中国医疗器械杂志最新文献

[Advances in Surface Modification Techniques of Ureteral Stents]. 输尿管支架表面修饰技术的研究进展

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240535

Guanjun Ma, Hua Xie, Chao Zhou, Guangtai Zhou, Haijun Zhang

引用次数: 0

[Development of Synchronous Arbitrary Gate-PW Doppler for Ultrasound Microvascular Imaging and Preliminary Validation]. 同步任意门- pw多普勒超声微血管成像的研制及初步验证

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240675

Chao Li, Lanxi Xiang, Yigang Du, Zhilan Zheng, Shuangshuang Li

引用次数: 0

[Quantitative Analysis of the Impact of Various iCBCTs on the Image Quality of Lung Adaptive Radiotherapy]. [各种icbct对肺部适应性放疗图像质量影响的定量分析]。

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.250014

Ruifeng Zhao, Bin Su, Xiaofei Jiang

{"title":"[Quantitative Analysis of the Impact of Various iCBCTs on the Image Quality of Lung Adaptive Radiotherapy].","authors":"Ruifeng Zhao, Bin Su, Xiaofei Jiang","doi":"10.12455/j.issn.1671-7104.250014","DOIUrl":"10.12455/j.issn.1671-7104.250014","url":null,"abstract":"Objective: To investigate the impact of different iterative cone beam CT (iCBCT) scanning beam currents from a ring-mounted linac on synthetic CT image quality for lung adaptive radiotherapy under lung scanning protocol.Methods: The CIRS lung motion phantom was configured to simulate conventional respiratory motion pattern, followed by 4D-CT simulation. After transferring the radiotherapy plan to the ring-mounted Halcyon 3.0 linac, three groups of typical iCBCT scans with different beam currents [ I low (160 mA), I middle (282 mA), and I high (491 mA)] were performed and corresponding image reconstructions were completed. Synthetic CT (sCT) images were subsequently obtained based on the deformable registration algorithm.Results: Compared to the corresponding CBCT images, the sCT images exhibited a significant reduction in artifacts. The fine structure of the planning CT (pCT) image was preserved for sCT images corresponding to different scanning beam currents, with Dice similarity coefficients exceeding 0.90 for all cases.Conclusion: The image quality of sCT corresponding to different iCBCTs is comparable to that of pCT, and changes in iCBCT beam parameters have a negligible impact on sCT image quality. Taking into account both image quality and imaging dose factors associated with the beam currents, iCBCT with a lower beam current on the ring-mounted Halcyon linac offers greater clinical value in lung adaptive radiotherapy.","PeriodicalId":52535,"journal":{"name":"中国医疗器械杂志","volume":"49 4","pages":"423-428"},"PeriodicalIF":0.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145066290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Design and Experimental Study of Electrical Impedance Tomography System for Tumor Ablation Boundary Monitoring]. [用于肿瘤消融边界监测的电阻抗断层成像系统设计与实验研究]。

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.250010

Wei Wei, Lidong Xing, Xiaofei Jin, Zhiyu Qian, Jingqi Song, Kairan Wan, Haotian Wang

{"title":"[Design and Experimental Study of Electrical Impedance Tomography System for Tumor Ablation Boundary Monitoring].","authors":"Wei Wei, Lidong Xing, Xiaofei Jin, Zhiyu Qian, Jingqi Song, Kairan Wan, Haotian Wang","doi":"10.12455/j.issn.1671-7104.250010","DOIUrl":"10.12455/j.issn.1671-7104.250010","url":null,"abstract":"The minimally invasive thermal ablation technology differs from traditional surgical operations, which requires auxiliary equipment to evaluate ablation results. However, the ultrasound and CT currently used in clinical practice have shortcomings such as artifacts and radiation. Therefore, this paper proposes a design for a minimally invasive thermal ablation evaluation system based on the principle of electrical impedance tomography technology to monitor the ablation range. At the same time, the innovative introduction of a programmable gain feedforward signal as the parameter signal of the multiplier demodulator in the electrical impedance tomography system design can effectively solve the problem of weak signals being submerged in noise and improve imaging accuracy. The system controls the amplitude of the excitation current signal and the acquisition / processing of boundary voltages via an STM32, uploads the collected data to an upper computer, and reconstructs the conductivity distribution using the Newton-Raphson algorithm to map the size of the ablation area. Experimental results show that the system can effectively reflect the size of the microwave ablation area. Under the same minimally invasive ablation parameters, the average imaging errors are 0.6 mm for the long diameter, 0.8 mm for the short diameter, and 1.75% for the axial ratio (long diameter / short diameter), demonstrating high consistency. This verifies the technical potential of electrical impedance tomography in minimally invasive thermal ablation.","PeriodicalId":52535,"journal":{"name":"中国医疗器械杂志","volume":"49 4","pages":"444-452"},"PeriodicalIF":0.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145066251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Applications of AI Technology in Radiation Safety and Protection]. [人工智能技术在辐射安全防护中的应用]。

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240336

Xiaowa Wang

引用次数: 0

[Research Strategies for Quality Evaluation of Medical Wound Dressings]. 医用伤口敷料质量评价研究策略

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.250058

Yanhui Xu, Xiang Li, Jinsheng Xie, Fang Lin, Jingfeng Zheng

引用次数: 0

[Estimation of Primary Electron Beam Parameters of Individual Linear Accelerator Using Monte Carlo Method]. [用蒙特卡罗方法估计单个直线加速器的初级电子束参数]。

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240632

Yisong He, Hang Yu, Yuchuan Fu, Jinyou Hu, Lian Zou

引用次数: 0

[Study on Quantitative Evaluation Method of Balance Ability in Cancer Patients Based on Gait Features]. 基于步态特征的癌症患者平衡能力定量评价方法研究

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240656

Junjie Liu, Xu Zhou, Chao Yu, Qingqing Cao, Zhiming Yao, Wanqiu Zhang, Ling Zhang, Wanqing Yao, Ning Lin

{"title":"[Study on Quantitative Evaluation Method of Balance Ability in Cancer Patients Based on Gait Features].","authors":"Junjie Liu, Xu Zhou, Chao Yu, Qingqing Cao, Zhiming Yao, Wanqiu Zhang, Ling Zhang, Wanqing Yao, Ning Lin","doi":"10.12455/j.issn.1671-7104.240656","DOIUrl":"10.12455/j.issn.1671-7104.240656","url":null,"abstract":"The importance of gait assessment in the rehabilitation of cancer patients is gradually being recognized. However, quantitative analysis of balance ability in cancer patients is still limited. A total of 102 cancer patients meeting the inclusion criteria were recruited from Hefei Cancer Hospital, Chinese Academy of Sciences. Their balance ability was evaluated using the Berg Balance Scale (BBS). Gait data were collected by an electronic walkway and an IMU sensor system, including spatial-temporal and kinematic gait features such as step length, cadence, support time, and range of motion. Recursive feature elimination was used for feature selection. Ridge, Elastic Net, SVR, RF, and AdaBoost models were used to predict balance ability scores. Five-fold cross-validation was used to evaluate the performance of these models. Results show that the SVR model achieves the best performance with fifteen features (RMSE=3.22, R 2=0.91), followed by Ridge (RMSE=3.63, R 2=0.89). A method for evaluating balance ability based on gait features is proposed, providing a quantitative tool for personalized rehabilitation interventions in cancer patients.","PeriodicalId":52535,"journal":{"name":"中国医疗器械杂志","volume":"49 4","pages":"369-374"},"PeriodicalIF":0.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145066295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Research on Application of Medical Device Real-World Evidence in Regulatory Decisions of the United States]. [美国医疗器械真实世界证据在监管决策中的应用研究]。

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240522

Xiaofang Gu, Yuanyuan Hou, Kai Lin, Juenan Pan

引用次数: 0

[Study on the Innovative Development of Photon Counting CT from Patent and Clinical Research Perspectives]. 【从专利与临床研究角度探讨光子计数CT的创新发展】。

中国医疗器械杂志 Pub Date : 2025-07-30 DOI: 10.12455/j.issn.1671-7104.240730

Ping Wang, Hao Xu, Xiaoying Sun, Bochao Zhou, Zhanfeng Xing

引用次数: 0