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Impact of three-dimensional reconstruction on ischaemic time and operative time in robot-assisted partial nephrectomy 认领 引用
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作者 Deerush Kannan Sakthivel Sindhu Sankaran +2 位作者 Madhav Tiwari Sandeep Bafna Narasimhan Ragavan 《Asian Journal of Urology》 CAS CSCD 2026年第1期52-55,共4页
Objective:Partial nephrectomy(PN)is the standard treatment for T1a renal masses,increasingly applied to T1b tumours due to advancements in robotic surgery and imaging.While CT urograms are standard,three-dimensional(3... Objective:Partial nephrectomy(PN)is the standard treatment for T1a renal masses,increasingly applied to T1b tumours due to advancements in robotic surgery and imaging.While CT urograms are standard,three-dimensional(3D)reconstruction is gaining traction for complex tumours to enhance preoperative planning.This study aimed to compare the impact of 3D reconstruction on operative time and ischaemic time during robot-assisted PN.Methods:A prospective,non-randomised study was conducted on 112 patients who underwent robot-assisted PN between January 2020 and October 2022.Patients were divided into two groups:Group A(n=56)with the aid of 3D reconstruction for complex tumours and Group B(n=56)without 3D reconstruction.Operative time and ischaemic time were analysed,along with other outcomes such as margin positivity and postoperative complications.Results:Despite higher tumour complexity in Group A,mean operative time(190.1[standard deviation,SD 38.5]min vs.189.3[SD 42.6]min)and mean ischaemic time(20.4[SD 5.6]min vs.20.3[SD 5.3]min)were comparable between Group A and Group B.Margin positivity and complications were also similar,suggesting that 3D reconstruction aids in efficient surgery even for complex cases.-Conclusion:3D reconstruction enhances understanding of complex renal tumours,maintaining operative efficiency comparable to less complex cases.Further randomized studies are needed to confirm these findings. 展开更多
关键词 Three-dimensional reconstruction Robot-assisted partial nephrectomy Nephron sparing surgery Augmented reality Robotic urological surgery Minimally invasive surgery
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Clinical value of computed tomography-based three-dimensional reconstruction of the pelvis and mesorectum in middle to low rectal carcinoma 认领 引用
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作者 Fei-Yue Ke Hao Chen +5 位作者 Ji-Sheng Liu Wen-Cai Li Gaurav Dhamija Ruchi Dharamshibhai Viroja Gui-Ping Chen Xiao-Cong Zhou 《World Journal of Gastrointestinal Surgery》 SCIE 2026年第5期275-288,共14页
BACKGROUND Laparoscopic anus-preserving resection for middle to low rectal carcinoma is technically challenging because of restricted pelvic space and bulky mesorectum.Although computed tomography(CT)imaging-based thr... BACKGROUND Laparoscopic anus-preserving resection for middle to low rectal carcinoma is technically challenging because of restricted pelvic space and bulky mesorectum.Although computed tomography(CT)imaging-based threedimensional(3D)reconstruction enables accurate pelvic and mesorectal measurements,few studies have systematically quantified sex-related differences or explored their impact on surgical outcomes.AIM To evaluate sex-related pelvic and mesorectal anatomical differences using CT-based 3D reconstruction and assess their clinical relevance in middle to low rectal carcinoma.METHODS We retrospectively analyzed 103 patients with primary middle to low rectal carcinoma who underwent laparoscopic low or ultra-low anterior resection between January 2018 and January 2024.Pelvic and mesorectal parameters were obtained using CT-based 3D reconstructions.Differences between sexes were compared,and their associations with operative difficulty and short-term outcomes were evaluated.RESULTS Significant sex-related differences were observed in pelvic diameters,pelvic angles,pelvic volume,and mesorectal fat volume(all P<0.05).Male patients had smaller pelvic volumes(P=0.007)but larger mesorectal fat volumes(P=0.047)compared with female patients.Despite a higher incidence of previous abdominal surgery among female patients(P<0.05),intraoperative blood loss was significantly lower in females than in males(P<0.05).CONCLUSION CT-based 3D reconstruction reveals clinically relevant sex-related pelvic and mesorectal anatomical differences that may aid in preoperative assessment of middle to low rectal carcinoma. 展开更多
关键词 Rectal carcinoma Pelvic anatomy Three-dimensional reconstruction Pelvic volume Mesorectal fat Laparoscopic surgery
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Comparison of Freeze-drying and Gradient Dehydration Treatment on X-ray Imaging for Three-dimensional Reconstruction of Early Human Embryonic Brain Samples 认领 引用
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作者 Yangqianbo Yao Wenjie Hao +3 位作者 Shengju Wu Qizhi He Tiqiao Xiao Zhijun Zhang 《Neuroscience Bulletin》 SCIE CAS CSCD 2026年第4期931-936,共6页
Dear Editor,Understanding early human brain development is crucial for uncovering the origins of neurodevelopmental disorders[1].Traditional methods,such as histological staining and sectioning,provide only two-dimens... Dear Editor,Understanding early human brain development is crucial for uncovering the origins of neurodevelopmental disorders[1].Traditional methods,such as histological staining and sectioning,provide only two-dimensional views,which fail to display the complete structure and often damage delicate tissue structures[2].These approaches face limitations in visualizing complex three-dimensional(3D)networks,particularly the developing vascular system. 展开更多
关键词 developing vascular system x ray imaging early human brain development gradient dehydration three dimensional reconstruction histological staining delicate tissue structures freeze drying
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Three-dimensional reconstruction under computed tomography and myopectineal orifice measurement under laparoscopy for quality control of inguinal hernia treatment 认领 引用 被引量：3
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作者 Lei Zhang Jing Chen +7 位作者 Yu-Ying Zhang Lei Liu Han-Dan Wang Ya-Fei Zhang Jun Sheng Qiu-Shi Hu Ming-Liang Liu Yi-Lin Yuan 《World Journal of Gastrointestinal Endoscopy》 2025年第3期50-59,共10页
BACKGROUND Inguinal hernias are common after surgery.Tension-free repair is widely accepted as the main method for managing inguinal hernias.Adequate exposure,coverage,and repair of the myopectineal orifice(MPO)are ne... BACKGROUND Inguinal hernias are common after surgery.Tension-free repair is widely accepted as the main method for managing inguinal hernias.Adequate exposure,coverage,and repair of the myopectineal orifice(MPO)are necessary.However,due to differences in race and sex,people’s body shapes vary.According to European guidelines,the patch should measure 10 cm×15 cm.If any part of the MPO is dissected,injury to the nerves,vascular network,or organs may occur during surgery,thereby leading to inguinal discomfort,pain,and seroma formation after surgery.Therefore,accurate localization and measurement of the boundary of the MPO are crucial for selecting the optimal patch for inguinal hernia repair.AIM To compare the size of the MPO measured on three-dimensional multislice spiral computed tomography(CT)with that measured via laparoscopy and explore the relevant factors influencing the size of the MPO.METHODS Clinical data from 74 patients who underwent laparoscopic tension-free inguinal hernia repair at the General Surgery Department of the First Affiliated Hospital of Anhui University of Science and Technology between September 2022 and July 2024 were collected and analyzed retrospectively.Transabdominal preperitoneal was performed.Sixty-four males and 10 females,with an average age of 58.30±12.32 years,were included.The clinical data of the patients were collected.The boundary of the MPO was measured on three-dimensional CT images before surgery and then again during transabdominal preperitoneal.All the preoperative and intraoperative data were analyzed via paired t-tests.A t-test was used for comparisons of age,body mass index,and sex between the groups.In the comparative analysis,a P value less than 0.05 indicated a significant difference.RESULTS The boundaries of the MPO on 3-dimensional CT images measured 7.05±0.47 cm and 6.27±0.61 cm,and the area of the MPO was 19.54±3.33 cm2.The boundaries of the MPO during surgery were 7.18±0.51 cm and 6.17±0.40 cm.The errors were not statistically significant.However,the intraoperative BD(the width of the MPO,P=0.024,P0.05).CONCLUSION The application of this technology can aid in determining the most appropriate dissection range and patch size. 展开更多
关键词 Hernia Inguinal Myopectineal orifice Three-dimensional reconstruction Computed tomography Inguinal hernia
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Safety and efficacy of three-dimensional reconstruction technologyassisted percutaneous transhepatic biliary drainage:A metaanalysis 认领 引用
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作者 Ze-Hui Chen Li-Juan Zhang +4 位作者 Zhi-Xin Lin Shu-Xiang Lin Zheng-Fu Song Ze-Jian Wu Wei Lin 《World Journal of Gastrointestinal Surgery》 SCIE 2025年第9期367-380,共14页
BACKGROUND Percutaneous transhepatic biliary drainage(PTBD)is one of the primary clinical treatment options for patients with obstructive jaundice.In recent years,PTBD assisted by three-dimensional(3D)reconstruction t... BACKGROUND Percutaneous transhepatic biliary drainage(PTBD)is one of the primary clinical treatment options for patients with obstructive jaundice.In recent years,PTBD assisted by three-dimensional(3D)reconstruction technology has been widely implemented,but its advantages over traditional methods remains inconclusive.Thus,a discussion is warranted.AIM To explore the safety and efficacy of 3D reconstruction technology-assisted PTBD.METHODS We systematically searched the databases including the Cochrane Library,PubMed,EMBASE,Web of Science and China National Knowledge Infrastructure.The search period extended from the establishment of each database to November,2024.We screened the literature according to predefined inclusion and exclusion criteria,assessed the quality of the studies,and extracted data.Meta-analysis was performed using Revman 5.4.1 software.RESULTS A total of 15 studies were included,involving 1434 patients.The results of the meta-analysis showed that compared with the traditional group,the overall post-operative complications rate in the 3D reconstruction technology group was significantly lower[odds ratio=0.25;95%confidence interval(CI):0.17-0.36,P<0.00001].The overall puncture success rate in the 3D reconstruction group was better than those in the traditional group(odds ratio=3.61;95%CI:1.98-6.55,P<0.0001).However,there was no significant difference between the two groups in the reduction levels of postoperative total bilirubin(mean difference=-1.38;95%CI:-3.29 to 0.53,P=0.16).Subgroup analysis were conducted on the surgery time according to guidance stages of the 3D reconstruction,3D reconstruction imaging modalities,and types of studies.The results were stable,with no significant changes observed.CONCLUSION 3D reconstruction technology significantly improves the puncture success rate and safety of PTBD.However,it has no significant advantage in bile drainage effectiveness.Continued research is warranted to further explore its clinical value and optimize its application. 展开更多
关键词 Three-dimensional reconstruction technology Percutaneous transhepatic biliary drainage Obstructive jaundice Complications Liver function
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Three-Dimensional Reconstruction and Comparison of Three Tuna Species’Fish Body Structures Based on CT Scanning 认领 引用
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作者 SONG Liming ZHU Mingshan +1 位作者 ZHOU Zihan LI Yuwei 《Journal of Ocean University of China》 SCIE CAS CSCD 2025年第5期1341-1350,共10页
To better understand the biological structure of bigeye tuna(Thunnus obesus),albacore tuna(Thunnus alalunga),and longtail tuna(Thunnus tonggol),computed tomography(CT)was used to scan their bodies,and the data are pro... To better understand the biological structure of bigeye tuna(Thunnus obesus),albacore tuna(Thunnus alalunga),and longtail tuna(Thunnus tonggol),computed tomography(CT)was used to scan their bodies,and the data are processed by Mimics software.The skeleton,swim bladder,and muscle of the three tuna species are reconstructed in three dimensions.The surface area and volume of the corresponding parts are measured.The results show that the surface areas of the skeleton of longtail tuna,bigeye tuna,albacore tuna accounted for 28.18%,37.34%,33.45%of their whole body surface areas respectively;the surface areas of swim bladder accounted for 0,2.06%,2.72% of their whole body surface area respectively;and the surface areas of muscle accounted for 71.82%,60.6%,63.83%of their whole body surface areas respectively.And the volumes of skeleton accounted for 28.18%,8.05%,3.84%,the volumes of swim bladder accounted for 0,3.44%,0.92%,and the volumes of muscle accounted for 94.84%,88.51%,95.24%of their body volumes respectively.The swim bladder of the longtail tuna has degenerated,while that of the bigeye tuna is conical,exhibiting the highest volume proportion among the three species.In contrast,the swim bladder of the albacore tuna is both flat and elongated,resembling an arc.Additionally,the surface area and the volume of the bigeye tuna’s swim bladder differ signifi-cantly from those of the albacore tuna.Regarding skeletal and muscular structures,the bigeye tuna has the highest skeletal volume proportion(8.05%),whereas the albacore tuna exhibits the highest muscle volume proportion(95.24%).These morphological differences are closely associated with their respective habitats.This study demonstrates the potential of CT technology in fish morphological research,providing a reliable,non-invasive method for analyzing internal structures,quantifying organ characteristics and improving the accuracy of acoustic stock assessment. 展开更多
关键词 bigeye tuna albacore tuna longtail tuna CT scan 3D reconstruction mimics software
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Three-dimensional reconstruction method for measuring the knee valgus angle of the femur in northern Chinese adults 认领 引用 被引量：10
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作者 Tong LIU Chen-yu WANG +4 位作者 Jian-lin XIAO Lan-yu ZHU Xue-zhou LI Yan-guo QIN Zhong-li GAO 《Journal of Zhejiang University-SCIENCE B》 SCIE CAS CSCD 2014年第8期720-726,共7页
The purpose of this study was to establish a method for measuring the knee valgus angle from the ana- tomical and mechanical axes on three-dimensional reconstruction imaging models, and to use this method for estimati... The purpose of this study was to establish a method for measuring the knee valgus angle from the ana- tomical and mechanical axes on three-dimensional reconstruction imaging models, and to use this method for estimating an average knee valgus angle value for northern Chinese adults. Computed tomographic angiography data in DICOM format for 128 normal femurs from 64 adult subjects were chosen for analysis. After the femur images were subjected to three-dimensional reconstruction, the deepest point in the intercondylar notch （point A）, the midpoint of the medullary cavity 20 cm above the knee-joint line （point B）, and the landmark of the femoral head rotation center （point C） were identified on each three-dimensional model. The knee valgus angle was defined as the angle enclosed by the distal femoral anatomical axis （line AB） and the femoral mechanical axis （line AC）. The average （mean＋SD） of knee valgus angle for the 128 femurs was 6.20°±1.20° （range, 3.05° to 10.64°）. Significant positive correlations were found between the knee valgus angles of the right and left sides and between the knee valgus angle and age. During total knee arthroplasty, choosing a valgus cut angle of approximately 6° may achieve a good result in reestablishing the natural mechanical alignment of the lower extremity for patients of northern Chinese ethnicity. Larger valgus cut angles should be chosen for older patients. 展开更多
关键词 Knee valgus angle Three-dimensional reconstruction femoral model Total knee arthroplasty NorthernChinese adults Preoperative design
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GPU-accelerated three-dimensional reconstruction method of the Compton camera and its application in radionuclide imaging 认领 引用 被引量：4
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作者 Ren-Yao Wu Chang-Ran Geng +6 位作者 Feng Tian Zhi-Yang Yao Chun-Hui Gong Hao-Nan Han Jian-Feng Xu Yong-Shun Xiao Xiao-Bin Tang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第4期54-68,共15页
A novel and fast three-dimensional reconstruction method for a Compton camera and its performance in radionuclide imaging is proposed and analyzed in this study. The conical surface sampling back-projection method wit... A novel and fast three-dimensional reconstruction method for a Compton camera and its performance in radionuclide imaging is proposed and analyzed in this study. The conical surface sampling back-projection method with scattering angle correction(CSS-BP-SC) can quickly perform the back-projection process of the Compton cone and can be used to precompute the list-mode maximum likelihood expectation maximization(LM-MLEM). A dedicated parallel architecture was designed for the graphics processing unit acceleration of the back-projection and iteration stage of the CSS-BP-SC-based LM-MLEM. The imaging results of the two-point source Monte Carlo(MC) simulation demonstrate that by analyzing the full width at half maximum along the three coordinate axes, the CSS-BP-SC-based LM-MLEM can obtain imaging results comparable to those of the traditional reconstruction algorithm, that is, the simple back-projection-based LM-MLEM. The imaging results of the mouse phantom MC simulation and experiment demonstrate that the reconstruction results obtained by the proposed method sufficiently coincide with the set radioactivity distribution, and the speed increased by more than 664 times compared to the traditional reconstruction algorithm in the mouse phantom experiment. The proposed method will further advance the imaging applications of Compton cameras. 展开更多
关键词 Compton camera Three-dimensional reconstruction Radionuclide imaging GPU
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Hyper-accuracy three-dimensional reconstruction as a tool for better planning of retroperitoneal liposarcoma resection: A case report 认领 引用 被引量：4
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作者 Mu-Shi Ye Hao-Kai Wu +2 位作者 Xing-Zhang Qin Fan Luo Zhuo Li 《World Journal of Clinical Cases》 SCIE 2022年第1期268-274,共7页
BACKGROUND Well-differentiated liposarcoma is the second most common pathologic type of retroperitoneal sarcoma.It is characterized by a huge mass,but multiple organ invasions are common.Surgery is the only treatment ... BACKGROUND Well-differentiated liposarcoma is the second most common pathologic type of retroperitoneal sarcoma.It is characterized by a huge mass,but multiple organ invasions are common.Surgery is the only treatment option for potential cure.Hyper-accuracy three-dimensional(3D)reconstruction is widely used in robotic partly nephrectomy owing to its ability to visualize overlapping anatomy.CASE SUMMARY A 54-year-old man was admitted for progressive abdominal distension over the preceding 2 mo.Computed tomography revealed a 32 cm×21 cm×12 cm lipomatous mass.Hyper-accuracy 3D reconstruction was performed because of the complex relationship between the mass and nearby tissue.The patient underwent surgical resection,and the tumor did not recur for over 16 mo.CONCLUSION Hyper-accuracy 3D reconstruction is useful for operative planning owing to its intuitiveness and precise determination of anatomical structures in both tumors and nearby tissues. 展开更多
关键词 Well-differentiated liposarcoma Hyper-accuracy three-dimensional reconstruction Surgical resection Case report
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Science Letters:Dynamic concision for three-dimensional reconstruction of human organ built with virtual reality modelling language (VRML) 认领 引用 被引量：4
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作者 禹正杨 郑树森 +2 位作者 陈雷霆 何晓乾 王建军 《Journal of Zhejiang University-SCIENCE B》 EI CAS 2005年第7期611-616,共6页
This research studies the process of 3D reconstruction and dynamic concision based on 2D medical digital images using virtual reality modelling language (VRML) and JavaScript language, with a focus on how to realize t... This research studies the process of 3D reconstruction and dynamic concision based on 2D medical digital images using virtual reality modelling language (VRML) and JavaScript language, with a focus on how to realize the dynamic concision of 3D medical model with script node and sensor node in VRML. The 3D reconstruction and concision of body internal organs can be built with such high quality that they are better than those obtained from the traditional methods. With the function of dynamic concision, the VRML browser can offer better windows for man-computer interaction in real-time environment than ever before. 3D reconstruction and dynamic concision with VRML can be used to meet the requirement for the medical observation of 3D reconstruction and have a promising prospect in the fields of medical imaging. 展开更多
关键词 Virtual Reality Modelling Language (VRML) Direct texture mapping Three-dimensional reconstruction Dynamic concision
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Three-dimensional reconstruction of industrial parts from a single image 认领 引用 被引量：2
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作者 Zhenxing Xu Aizeng Wang +1 位作者 Fei Hou Gang Zhao 《Visual Computing for Industry,Biomedicine,and Art》 EI 2024年第1期340-351,共12页
This study proposes an image-based three-dimensional(3D)vector reconstruction of industrial parts that can gener-ate non-uniform rational B-splines(NURBS)surfaces with high fidelity and flexibility.The contributions o... This study proposes an image-based three-dimensional(3D)vector reconstruction of industrial parts that can gener-ate non-uniform rational B-splines(NURBS)surfaces with high fidelity and flexibility.The contributions of this study include three parts:first,a dataset of two-dimensional images is constructed for typical industrial parts,including hex-agonal head bolts,cylindrical gears,shoulder rings,hexagonal nuts,and cylindrical roller bearings;second,a deep learning algorithm is developed for parameter extraction of 3D industrial parts,which can determine the final 3D parameters and pose information of the reconstructed model using two new nets,CAD-ClassNet and CAD-ReconNet;and finally,a 3D vector shape reconstruction of mechanical parts is presented to generate NURBS from the obtained shape parameters.The final reconstructed models show that the proposed approach is highly accurate,efficient,and practical. 展开更多
关键词 Three-dimensional reconstruction Non-uniform rational B-splines Industrial parts Deep learning
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Evaluating the use of three-dimensional reconstruction visualization technology for precise laparoscopic resection in gastroesophageal junction cancer 认领 引用 被引量：2
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作者 Dan Guo Xiao-Yan Zhu +2 位作者 Shuai Han Yu-Shu Liu Da-Peng Cui 《World Journal of Gastrointestinal Surgery》 SCIE 2024年第5期1311-1319,共9页
BACKGROUND Laparoscopic gastrectomy for esophagogastric junction(EGJ)carcinoma enables the removal of the carcinoma at the junction between the stomach and esophagus while preserving the gastric function,thereby provi... BACKGROUND Laparoscopic gastrectomy for esophagogastric junction(EGJ)carcinoma enables the removal of the carcinoma at the junction between the stomach and esophagus while preserving the gastric function,thereby providing patients with better treatment outcomes and quality of life.Nonetheless,this surgical technique also presents some challenges and limitations.Therefore,three-dimensional reconstruction visualization technology(3D RVT)has been introduced into the procedure,providing doctors with more comprehensive and intuitive anatomical information that helps with surgical planning,navigation,and outcome evaluation.AIM To discuss the application and advantages of 3D RVT in precise laparoscopic resection of EGJ carcinomas.METHODS Data were obtained from the electronic or paper-based medical records at The First Affiliated Hospital of Hebei North University from January 2020 to June 2022.A total of 120 patients diagnosed with EGJ carcinoma were included in the study.Of these,68 underwent laparoscopic resection after computed tomography(CT)-enhanced scanning and were categorized into the 2D group,whereas 52 underwent laparoscopic resection after CT-enhanced scanning and 3D RVT and were categorized into the 3D group.This study had two outcome measures:the deviation between tumor-related factors(such as maximum tumor diameter and infiltration length)in 3D RVT and clinical reality,and surgical outcome indicators(such as operative time,intraoperative blood loss,number of lymph node dissections,R0 resection rate,postoperative hospital stay,postoperative gas discharge time,drainage tube removal time,and related complications)between the 2D and 3D groups.RESULTS Among patients included in the 3D group,27 had a maximum tumor diameter of less than 3 cm,whereas 25 had a diameter of 3 cm or more.In actual surgical observations,24 had a diameter of less than 3 cm,whereas 28 had a diameter of 3 cm or more.The findings were consistent between the two methods(χ2=0.346,P=0.556),with a kappa consistency coefficient of 0.808.With respect to infiltration length,in the 3D group,23 patients had a length of less than 5 cm,whereas 29 had a length of 5 cm or more.In actual surgical observations,20 cases had a length of less than 5 cm,whereas 32 had a length of 5 cm or more.The findings were consistent between the two methods(χ2=0.357,P=0.550),with a kappa consistency coefficient of 0.486.Pearson correlation analysis showed that the maximum tumor diameter and infiltration length measured using 3D RVT were positively correlated with clinical observations during surgery(r=0.814 and 0.490,both P<0.05).The 3D group had a shorter operative time(157.02±8.38 vs 183.16±23.87),less intraoperative blood loss(83.65±14.22 vs 110.94±22.05),and higher number of lymph node dissections(28.98±2.82 vs 23.56±2.77)and R0 resection rate(80.77%vs 61.64%)than the 2D group.Furthermore,the 3D group had shorter hospital stay[8(8,9)vs 13(14,16)],time to gas passage[3(3,4)vs 4(5,5)],and drainage tube removal time[4(4,5)vs 6(6,7)]than the 2D group.The complication rate was lower in the 3D group(11.54%)than in the 2D group(26.47%)(χ2=4.106,P<0.05).CONCLUSION Using 3D RVT,doctors can gain a more comprehensive and intuitive understanding of the anatomy and related lesions of EGJ carcinomas,thus enabling more accurate surgical planning. 展开更多
关键词 Gastroesophageal junction cancer Endoscopy Tumor resection Three-dimensional reconstruction visualization Two-dimensional imaging computed tomography
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Assessment of Gastric Cancer: Value of Two-phase Multidetector-row Spiral CT Three-dimensional Reconstruction Technique 认领 引用 被引量：4
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作者 李震 胡道予 +2 位作者 肖明 张进华 宋金梅 《The Chinese-German Journal of Clinical Oncology》 2005年第6期365-368,共4页
Abstract Objective： To evaluate the diagnostic value of two-phase multidetector-row spiral CT threedimensional reconstruction technique in TNM staging of gastric cancer. Methods： In 29 patients with gastric carcinom... Abstract Objective： To evaluate the diagnostic value of two-phase multidetector-row spiral CT threedimensional reconstruction technique in TNM staging of gastric cancer. Methods： In 29 patients with gastric carcinoma pathologically conformed, plan scans were done firstly. Two-phase spiral CT was performed within one breathhold each. Distension of the stomach was achieved by intravenous application of anisodamine and effervescent granules. After bolus injection of contrast medium, scanning was performed in the arterial and venous phase, and the source images were thin reconstructed. The stomach to three-dimension analysis was constructed by volume rendering （VR） multiplanaz volume reconstruction （MPVR）, shaded surface display （SSD） and CT virtual gastroscopy （CTVG） technique. In combination with the sources images, gastric tumour invasion and lymph node metastasis was assessed, and TNM staging was performed. Results： In 29 cases of gastric carcinoma, the sensitivity and specificity of two-phase multidetector-row spiral CT three-dimensional reconstruction technique in T1, T2, T3 and Ta staging, the sensitivity and specificity was 50% and 50%, 87.5% and 77.8%, 83.3% and 76.9% and 100% and 80% respectively. For the N staging, the sensitivity and specificity in No, N1, and N2 N3 was 83.3% and 71.4%, 87.5% and 77.8% and 81.8% and 75% respectively. The sensitivity and the specificity for M1 staging was 100%. Conclusion： The reconstruction technique in combination with 16-slices spiral-CT can perform TNM staging well and effectively guide the choice of the surgical procedures for gastric cancer. 展开更多
关键词 spiral-CT gastric carcinoma three-dimensional reconstruction
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Training image analysis for three-dimensional reconstruction of porous media 认领 引用 被引量：1
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作者 滕奇志 杨丹 +2 位作者 徐智 李征骥 何小海 《Journal of Southeast University(English Edition)》 EI CAS 2012年第4期415-421,共7页
In order to obtain a better sandstone three-dimensional （3D） reconstruction result which is more similar to the original sample, an algorithm based on stationarity for a two-dimensional （2D） training image is prop... In order to obtain a better sandstone three-dimensional （3D） reconstruction result which is more similar to the original sample, an algorithm based on stationarity for a two-dimensional （2D） training image is proposed. The second-order statistics based on texture features are analyzed to evaluate the scale stationarity of the training image. The multiple-point statistics of the training image are applied to obtain the multiple-point statistics stationarity estimation by the multi-point density function. The results show that the reconstructed 3D structures are closer to reality when the training image has better scale stationarity and multiple-point statistics stationarity by the indications of local percolation probability and two-point probability. Moreover, training images with higher multiple-point statistics stationarity and lower scale stationarity are likely to obtain closer results to the real 3D structure, and vice versa. Thus, stationarity analysis of the training image has far-reaching significance in choosing a better 2D thin section image for the 3D reconstruction of porous media. Especially, high-order statistics perform better than low-order statistics. 展开更多
关键词 three-dimensional reconstruction training image stationarity porous media multiple-point statistics
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Study on Multi-density Contrast Agent Fillers of Duct Casting Based on CT Three-Dimensional Reconstruction 认领 引用 被引量：6
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作者 黄海龙 陈进军 +2 位作者 王瑜 陈小宇 龚达聪 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 2017年第2期300-306,共7页
The three-dimensional visualization model of human body duct is based on virtual anatomical structure reconstruction with duct angiography,which realizes virtual model transferred from two-dimensional,planar and stati... The three-dimensional visualization model of human body duct is based on virtual anatomical structure reconstruction with duct angiography,which realizes virtual model transferred from two-dimensional,planar and static images into three-dimensional,stereoscopic and dynamic ones repectively.In recent years,the multi-duct segmentation and division of the same specimen（or organ） is the focus of attention shared by surgeons and clinical anatomists.On the basis of 4.22 g/cm3 body bone density,this study has screened out metal oxide contract agent with different density for infusion and modeling,as well as compared and analyzed the effects of three-dimensional image of CT virtual bronchoscopy（CTVB）,three-dimensional image of CT maximum intensity projection and three-dimensional model.This experiment result showed synchronously infusing multi-duct of same specimen（or organ） with contrast agent in different densities could reconstruct three-dimensional models of all ducts once only and adjust threshold to develop single or multiple ducts.It was easier to segment and observe the duct structure,anastomosis,directions and crossing in different parts,which was beyond comparison with three-dimensional image of CTVB.Although the existing three-dimensional duct reconstruction techniques still cannot be applied in living bodies temporarily,this study focused on a creative design of ducts segmentation in different density,which proposed a new experimental idea for developing multi-duct three-dimensional model in living body in the future.It will play a significant role in disease diagnosis and individual design in surgical treatment program.Therefore,this study observes the three-dimensional status of human duct with the application of contrast agent fillers in different density,combined with three-dimensional reconstruction technology.It provides an innovative idea and method for constructing three-dimensional model of digital multi-duct specimen,and the ultimate goal is to develop the digitized virtual human and precise medical treatment better and faster. 展开更多
关键词 bronchi of pig lung three-dimensional reconstruction contrast agent density difference duct casting
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A rapid micro-magnetic resonance imaging scanning for three-dimensional reconstruction of peripheral nerve fascicles 认领 引用 被引量：2
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作者 Zhi Yao Li-Wei Yan +7 位作者 Tao Wang Shuai Qiu Tao Lin Fu-Lin He Ru-Heng Yuan Xiao-Lin Liu Jian Qi Qing-Tang Zhu 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第11期1953-1960,共8页
The most common methods for three-dimensional reconstruction of peripheral nerve fascicles include histological and radiology techniques. Histological techniques have many drawbacks including an enormous manual worklo... The most common methods for three-dimensional reconstruction of peripheral nerve fascicles include histological and radiology techniques. Histological techniques have many drawbacks including an enormous manual workload and poor image registration. Micro-magnetic resonance imaging（Micro-MRI）, an emerging radiology technique, has been used to report results in the brain, liver and tumor tissues. However, micro-MRI usage for obtaining intraneural structures has not been reported. The aim of this study was to present a new imaging method for three-dimensional reconstruction of peripheral nerve fascicles by ~1T micro-MRI. Freshly harvested sciatic nerve samples from an amputated limb were divided into four groups. Two different scanning conditions（Mannerist Solution/GD-DTPA contrast agent, distilled water） were selected, and both T1 and T2 phases programmed for each scanning condition. Three clinical surgeons evaluated the quality of the images via a standardized scale. Moreover, to analyze deformation of the two-dimensional image, the nerve diameter and total area of the micro-MRI images were compared after hematoxylin-eosin staining. The results show that rapid micro-MRI imaging method can be used for three-dimensional reconstruction of the fascicle structure. Nerve sample immersed in contrast agent（Mannerist Solution/GD-DTPA） and scanned in the T1 phase was the best. Moreover, the nerve sample was scanned freshly and can be recycled for other procedures. MRI images show better stability and smaller deformation compared with histological images. In conclusion, micro-MRI provides a feasible and rapid method for three-dimensional reconstruction of peripheral nerve fascicles, which can clearly show the internal structure of the peripheral nerve. 展开更多
关键词 nerve regeneration peripheral nerve fascicular three-dimensional reconstruction fascicular topography micro-magnetic resonanceimaging rapid acquired images contrast agent Mannerist Solution histological techniques deformation analysis peripheral nerve injury neural regeneration
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Survey of methods and principles in three-dimensional reconstruction from two-dimensional medical images 认领 引用 被引量：6
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作者 Mriganka Sarmah Arambam Neelima Heisnam Rohen Singh 《Visual Computing for Industry,Biomedicine,and Art》 EI 2023年第1期199-217,共19页
Three-dimensional(3D)reconstruction of human organs has gained attention in recent years due to advances in the Internet and graphics processing units.In the coming years,most patient care will shift toward this new p... Three-dimensional(3D)reconstruction of human organs has gained attention in recent years due to advances in the Internet and graphics processing units.In the coming years,most patient care will shift toward this new paradigm.However,development of fast and accurate 3D models from medical images or a set of medical scans remains a daunting task due to the number of pre-processing steps involved,most of which are dependent on human expertise.In this review,a survey of pre-processing steps was conducted,and reconstruction techniques for several organs in medical diagnosis were studied.Various methods and principles related to 3D reconstruction were highlighted.The usefulness of 3D reconstruction of organs in medical diagnosis was also highlighted. 展开更多
关键词 Three-dimensional reconstruction Human organ Medical images
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Three-Dimensional Reconstruction of Fossil Insects within Their Ecosystems 认领 引用 被引量：1
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作者 WANG Chen SHIH Chungkun REN Dong 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第2期771-772,共2页
Objective This work is designed effect and production to improve the quality, visual efficiency of ecological reconstruction of fossil insects by using various three- dimensional software and exploring helpful methodo... Objective This work is designed effect and production to improve the quality, visual efficiency of ecological reconstruction of fossil insects by using various three- dimensional software and exploring helpful methodologies and techniques. 展开更多
关键词 Three-Dimensional Reconstruction of Fossil Insects within Their Ecosystems Maya
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Computed tomography three-dimensional reconstruction in the diagnosis of bleeding small intestinal polyps:A case report 认领 引用
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作者 Shu-Hui Zhang Ming-Wei Fan +2 位作者 Yan Chen Ying-Bin Hu Cheng-Xia Liu 《World Journal of Clinical Cases》 SCIE 2024年第16期2831-2836,共6页
BACKGROUND Computed tomography(CT)small bowel three-dimensional(3D)reconstruction is a powerful tool for the diagnosis of small bowel disease and can clearly show the intestinal lumen and wall as well as the outside s... BACKGROUND Computed tomography(CT)small bowel three-dimensional(3D)reconstruction is a powerful tool for the diagnosis of small bowel disease and can clearly show the intestinal lumen and wall as well as the outside structure of the wall.The horizontal axis position can show the best adjacent intestinal tube and the lesion between the intestinal tubes,while the coronal position can show the overall view of the small bowel.The ileal end of the localization of the display of excellent,and easy to quantitative measurement of the affected intestinal segments,the sagittal position for the rectum and the pre-sacral lesions show the best,for the discovery of fistulae is also helpful.Sagittal view can show rectal and presacral lesions and is useful for fistula detection.It is suitable for the assessment of inflammatory bowel disease,such as assessment of disease severity and diagnosis and differential diagnosis of the small bowel and mesenteric space-occupying lesions as well as the judgment of small bowel obstruction points.CASE SUMMARY Bleeding caused by small intestinal polyps is often difficult to diagnose in clinical practice.This study reports a 29-year-old male patient who was admitted to the hospital with black stool and abdominal pain for 3 months.Using the combination of CT-3D reconstruction and capsule endoscopy,the condition was diagnosed correctly,and the polyps were removed using single-balloon enteroscopyendoscopic retrograde cholangiopancreatography without postoperative complications.CONCLUSION The role of CT-3D in gastrointestinal diseases was confirmed.CT-3D can assist in the diagnosis and treatment of gastrointestinal diseases in combination with capsule endoscopy and small intestinal microscopy. 展开更多
关键词 Computed tomography three-dimensional reconstruction Capsule endoscopy Single-balloon enteroscopy Gastrointestinal bleeding Case report
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Phase Error Compensation of Three-Dimensional Reconstruction Combined with Hilbert Transform 认领 引用
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作者 Tao Zhang Jie Shen Shaoen Wu 《Computers, Materials & Continua》 SCIE EI 2021年第9期3121-3131,共11页
Nonlinear response is an important factor affecting the accuracy of three-dimensional image measurement based on the fringe structured light method.A phase compensation algorithm combined with a Hilbert transform is p... Nonlinear response is an important factor affecting the accuracy of three-dimensional image measurement based on the fringe structured light method.A phase compensation algorithm combined with a Hilbert transform is proposed to reduce the phase error caused by the nonlinear response of a digital projector in the three-dimensional measurement system of fringe structured light.According to the analysis of the influence of Gamma distortion on the phase calculation,the algorithm establishes the relationship model between phase error and harmonic coefficient,introduces phase shift to the signal,and keeps the signal amplitude constant while filtering out the DC component.The phase error is converted to the transform domain,and compared with the numeric value in the space domain.The algorithm is combined with a spiral phase function to optimize the Hilbert transform,so as to eliminate external noise,enhance the image quality,and get an accurate phase value.Experimental results show that the proposed method can effectively improve the accuracy and speed of phase measurement.By performing phase error compensation for free-form surface objects,the phase error is reduced by about 26%,and about 27%of the image reconstruction time is saved,which further demonstrates the feasibility and effectiveness of the method. 展开更多
关键词 Three-dimensional reconstruction structured light Hilbert transform phase compensation
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