Computer Assisted Surgery最新文献_第3页

Nonlinear ultrasonic imaging in pulse-echo mode using Westervelt equation: a preliminary research 基于Westervelt方程的脉冲回波模式非线性超声成像初步研究

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-09-24 DOI: 10.1080/24699322.2019.1649065

Wuxuan Chen, Peng Wang, Zhihong Zhang, Xudong Deng, C. Zhang, Shenggen Ju

引用次数: 5

Notice of Duplicate Publication 复本公告

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-09-16 DOI: 10.1080/24699322.2019.1646921

引用次数: 0

Quantitative assessment of three vendor’s metal artifact reduction techniques for CT imaging using a customized phantom 定量评估三个供应商的金属伪影减少技术用于CT成像使用定制的幻影

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-09-10 DOI: 10.1080/24699322.2019.1649075

R. Chou, Jung-Hui Li, Liu-Kuo Ying, Cheng-Hsun Lin, Wan Leung

{"title":"Quantitative assessment of three vendor’s metal artifact reduction techniques for CT imaging using a customized phantom","authors":"R. Chou, Jung-Hui Li, Liu-Kuo Ying, Cheng-Hsun Lin, Wan Leung","doi":"10.1080/24699322.2019.1649075","DOIUrl":"https://doi.org/10.1080/24699322.2019.1649075","url":null,"abstract":"Abstract A metal implant was placed in an acrylic phantom to enable quantitative analysis of the metal artifact reduction techniques used in computed tomography (CT) scanners from three manufacturers. Two titanium rods were placed in a groove in a cylindrical phantom made by acrylic, after which the groove was filled with water. The phantom was scanned using three CT scanners (Toshiba, GE, Siemens) under the abdomen CT setting. CT number accuracy, contrast-to-noise ratio, area of the metal rods in the images, and fraction of affected pixel area of water were measured using ImageJ. Different iterative reconstruction, dual energy, and metal artifact reduction techniques were compared within three vendors. The highest contrast-to-noise ratio of three scanners were 85.7 ± 8.4 (Toshiba), 85.9 ± 11.7 (GE), and 55.0 ± 14.8 (Siemens); and the most correct results of metal area were 157.1 ± 1.4 mm2 (Toshiba), 155.0 ± 1.0 (GE), and 170.6 ± 5.3 (Siemens). The fraction of affected pixel area obtained using single-energy metal artifact reduction of Toshiba scanner was 2.2% ± 0.7%, which is more favorable than 4.1% ± 0.7% obtained using metal artifact reduction software of GE scanner (p = 0.002). Among all quantitative results, the estimations with fraction of affected pixel areas matched the effect of metal artifact reduction in the actual images. Therefore, the single-energy metal artifact reduction technique of Toshiba scanner had a desirable effect. The metal artifact reduction software of GE scanner effectively reduced the effect of metal artifacts; however, it underestimated the size of the metal rods. The monoenergetic and dual energy composition techniques of Siemens scanner could not effectively reduce metal artifacts.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"24 1","pages":"34 - 42"},"PeriodicalIF":2.1,"publicationDate":"2019-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2019.1649075","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41771440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Evaluation of laparoscopic forceps jaw contact pressure and distribution using pressure sensitive film 用压敏膜评价腹腔镜钳颌接触压力及分布

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-29 DOI: 10.1080/24699322.2019.1649073

Rui Zhu, M. Maréchal, I. Yamamoto, M. Lawn, T. Nagayasu, Keitaro Matsumoto

{"title":"Evaluation of laparoscopic forceps jaw contact pressure and distribution using pressure sensitive film","authors":"Rui Zhu, M. Maréchal, I. Yamamoto, M. Lawn, T. Nagayasu, Keitaro Matsumoto","doi":"10.1080/24699322.2019.1649073","DOIUrl":"https://doi.org/10.1080/24699322.2019.1649073","url":null,"abstract":"Abstract In this study, the authors used the Fujifilm Prescale Pressure Measuring System to measure the contact pressure and distribution at the jaws of laparoscopic grasping forceps. This data was then correlated with measured pressures at the forceps handles to understand the relationship between the surgeon’s actuating pressure and that on the organ being manipulated. The purpose of this study is to create a database of tactile information to provide guidelines in defining minimally invasive surgery (MIS). This is expected to be important as today's society continues to progress in the use of automation, IoT, AI and MIS. In order to achieve the above, the authors developed an experimental device consisting of an actuator, a load cell and an MCU to stably actuate and control the handle side of grasping forceps. Target organs were simulated using triangular prisms of various silicone rubber materials. The experimental method involved actuating the handle side with preset pressure values for fixed time periods and using sensitive film to measure the pressure at the forceps tip. The film data was then scanned, processed and analyzed.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"24 1","pages":"105 - 116"},"PeriodicalIF":2.1,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2019.1649073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42603454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Design and control of a MRI-compatible pneumatic needle puncture robot 磁共振兼容气动穿刺机器人的设计与控制

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-26 DOI: 10.1080/24699322.2019.1649067

Baoliang Zhao, Y. Fu, Yuanyuan Yang, Peng Zhang, Ying Hu

引用次数: 5

Encoder-decoder with dense dilated spatial pyramid pooling for prostate MR images segmentation 用于前列腺MR图像分割的密集扩张空间金字塔池编码器-解码器

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-19 DOI: 10.1080/24699322.2019.1649069

Lei Geng, Jia Wang, Zhitao Xiao, Jun Tong, Fang Zhang, Jun Wu

引用次数: 10

Development of modified RSA algorithm using fixed mersenne prime numbers for medical ultrasound imaging instrumentation 医学超声成像仪器中使用固定梅森素数的改进RSA算法的发展

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-14 DOI: 10.1080/24699322.2019.1649070

Seung-Hyeok Shin, Won-Sok Yoo, Hojong Choi

{"title":"Development of modified RSA algorithm using fixed mersenne prime numbers for medical ultrasound imaging instrumentation","authors":"Seung-Hyeok Shin, Won-Sok Yoo, Hojong Choi","doi":"10.1080/24699322.2019.1649070","DOIUrl":"https://doi.org/10.1080/24699322.2019.1649070","url":null,"abstract":"Abstract Purpose: Encryption of patient information has become an important issue in medical ultrasound instrumentation to secure information when images are accessed off-site. The proposed algorithm is used to encrypt private medical images and transfer the encrypted images to improve the encryption capability and elapsed time. Materials and methods: We generate a public key using three prime numbers, including a fixed Mersenne prime number, in the modified Rivest-Shamir-Adelman (RSA) algorithm to compare the encryption capability. We calculated and compared the elapsed time using the modified RSA algorithm with a breast phantom in the medical ultrasound imaging instrumentation. Results: The encryption capability is improved because the elapsed time when using three prime numbers is longer (1.2337 s) than that when using two prime numbers (1.0712 s). However, the elapsed time using fixed Mersenne prime numbers (0.8360 s) is a similar to that using two prime numbers (0.8389 s). Conclusions: Our proposed cryptographic algorithm provides improved encryption in medical ultrasound imaging compared to algorithms that use two prime numbers that are not Mersenne prime numbers, while transmitting images with adequate elapsed times.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"24 1","pages":"73 - 78"},"PeriodicalIF":2.1,"publicationDate":"2019-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2019.1649070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44194308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Assisted therapeutic system based on reinforcement learning for children with autism 基于强化学习的自闭症儿童辅助治疗系统

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-14 DOI: 10.1080/24699322.2019.1649072

Minjia Li, Xue Li, Lun Xie, Jing Liu, Feifei Wang, Zhiliang Wang

{"title":"Assisted therapeutic system based on reinforcement learning for children with autism","authors":"Minjia Li, Xue Li, Lun Xie, Jing Liu, Feifei Wang, Zhiliang Wang","doi":"10.1080/24699322.2019.1649072","DOIUrl":"https://doi.org/10.1080/24699322.2019.1649072","url":null,"abstract":"Abstract Assisted therapy is increasingly used in autism spectrum disorders (ASD) for improving social interaction and communication skills in recent years. A lot of studies have proven that the form of interactive games for therapy has a good effect on children with autism. Thus, our study provided an assisted therapeutic system based on Reinforcement Learning (RL) for children with ASD, which has five interactive subgames. As is well known, it is necessary to establish and maintain compelling interactions in therapeutic process. Therefore, we aim to adjust the interactive content according to the emotions of children with autism. However, due to the atypical and unusually differences in children with autism, most systems are based on off-line training of small samples of individuals and online recognition, so the existing assisted systems are limited in their ability to automatically update system parameters of new mappings. The integration of RL and Convolutional Neural Network (CNN)-Support Vector Regression (SVR) was used to deal with the updating online of prediction model’s weights. The normalized emotion labels were evaluated by the therapists. Eleven children with autism as subjects were invited in this experiment and captured facial video images. The experiment lasted for five weeks of intermittent assisted therapy, and the results were evaluated for the system and the therapy effect. Finally, we achieved a general reduction in the root mean square error of the model prediction results and labels. Although there is no significant difference in Social Responsiveness Scale (SRS) scores before and after assisted therapy (p value = 0.60), in individual subjects (Sub. 1, Sub. 2 and Sub.3), the SRS total score is significantly reduced (Average drop of 19 points). These results demonstrate the effectiveness of prediction model based on RL and show the feasibility of assisted therapeutic system in children with autism.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"24 1","pages":"104 - 94"},"PeriodicalIF":2.1,"publicationDate":"2019-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2019.1649072","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46515683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Lung segmentation method with dilated convolution based on VGG-16 network 基于VGG-16网络的扩张卷积肺部分割方法

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-12 DOI: 10.1080/24699322.2019.1649071

Lei Geng, Siqi Zhang, Jun Tong, Zhitao Xiao

引用次数: 50

Clustering-based undersampling with random over sampling examples and support vector machine for imbalanced classification of breast cancer diagnosis 基于聚类的随机过采样样本下采样和支持向量机的乳腺癌症诊断不平衡分类

IF 2.1 4区医学

Computer Assisted Surgery Pub Date : 2019-08-12 DOI: 10.1080/24699322.2019.1649074

Jue Zhang, Li Chen

{"title":"Clustering-based undersampling with random over sampling examples and support vector machine for imbalanced classification of breast cancer diagnosis","authors":"Jue Zhang, Li Chen","doi":"10.1080/24699322.2019.1649074","DOIUrl":"https://doi.org/10.1080/24699322.2019.1649074","url":null,"abstract":"Abstract To overcome the two-class imbalanced classification problem existing in the diagnosis of breast cancer, a hybrid of Random Over Sampling Example, K-means and Support vector machine (RK-SVM) model is proposed which is based on sample selection. Random Over Sampling Example (ROSE) is utilized to balance the dataset and further improve the diagnosis accuracy by Support Vector Machine (SVM). As there is one different sample selection factor via clustering that encourages selecting the samples near the class boundary. The purpose of clustering here is to reduce the risk of removing useful samples and improve the efficiency of sample selection. To test the performance of the new hybrid classifier, it is implemented on breast cancer datasets and the other three datasets from the University of California Irvine (UCI) machine learning repository, which are commonly used datasets in class imbalanced learning. The extensive experimental results show that our proposed hybrid method outperforms most of the competitive algorithms in term of G-mean and accuracy indices. Additionally, experimental results show that this method also performs superiorly for binary problems.","PeriodicalId":56051,"journal":{"name":"Computer Assisted Surgery","volume":"24 1","pages":"62 - 72"},"PeriodicalIF":2.1,"publicationDate":"2019-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24699322.2019.1649074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42793989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 47