國家衛生研究院 NHRI:Item 3990099045/8431
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 12189/12972 (94%)
造访人次 : 954058      在线人数 : 770
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻
    主页 ‧ 登入 ‧ 上传 ‧ 说明 ‧ 关于NHRI ‧ 管理 到手机版


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.nhri.org.tw/handle/3990099045/8431


    题名: A moveable surface coil fabrication for MR-guided HIFU ablation
    作者: Hwang, SC;Chang, H;Kuo, IY;He, PH
    贡献者: Institute of Biomedical Engineering and Nanomedicine
    摘要: Background: In this study, a moveable MRI receive-only surface coil was fabricated and used to provide higher SNR MRI images focused on a small area. The moveable coil can be moved together with the HIFU transducer to improve the accuracy of MRI temperature measurement of HIFU ablation in a mini-pig model. Materials and methods A movable circle surface coils with a low input impedance preamplifier were made to connect the receive system of a 1.5T MRI scanner (Symphony, Siemens). The coil was moved together with the HIFU transducer during the HIFU ablation. The dynamic temperature images during HIFU ablation of porcine meat and living mini-pig leg were measured by this home-made coil. MR temperature measurements were calculated based on proton resonance frequency (PRF) shift method. A spoiled gradient echo sequence was applied for temperature mapping (TR = 13ms, TE = 7 ms, flip angle = 30 deg, matrix 128x128, FOV= 256 x 256 mm, slice thickness = 8 mm). Results: The SNR ratio using our coil was improved at least 3 times than using the commercial spinal coil array for the case of pig leg HIFU ablation since the coil is more closely to the target. The standard deviations of temperature measured by the moveable surface coils were 0.3, 0.6 deg C for porcine meat and pig leg, respectively. Conclusions: The results of our HIFU studies showed that the MRI image signal-to-noise ratio was improved and thus the higher precision of the temperature measurement could be obtained. It showed the advantage and feasibility of using a smaller and mobile surface coil for MR-guided HIFU ablation.
    日期: 2014-12-10
    關聯: Journal of Therapeutic Ultrasound. 2014 Dec 10;2(Suppl. 1):A20.
    Link to: http://dx.doi.org/10.1186/2050-5736-2-S1-A20
    显示于类别:[張恕(2004-2017)] 會議論文/會議摘要

    文件中的档案:

    档案 描述 大小格式浏览次数
    BMC2015010102.pdf88KbAdobe PDF586检视/开启


    在NHRI中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈