专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

US4920318A Surface coil system for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的表面线圈系统
公开(公告)号：US4920318A
公开(公告)日：1990-04-24
申请号：US252819
申请日：1988-10-03
申请人： George J. Misic , Gregory C. Hurst , G. Neil Holland , John L. Patrick, III , Paul T. Orlando
发明人： George J. Misic , Gregory C. Hurst , G. Neil Holland , John L. Patrick, III , Paul T. Orlando
IPC分类号： G01R33/34 , G01R33/341 , G01R33/36
CPC分类号： G01R33/3628 , G01R33/34046 , G01R33/341 , G01R33/34007 , G01R33/34084 , G01R33/3657
摘要： A resonance exciting coil (C) excites magnetic resonance in nuclei disposed in an image region in which a main magnetic field and transverse gradients have been produced. A flexible receiving coil (D) includes a flexible plastic sheet (40) on which one or more loops (20) are adhered to receive signals from the resonating nuclei. Velcro straps (46) strap the flexible sheet and the attached coil into close conformity with the surface of the portion of the patient to be imaged. An impedance matching or coil resonant frequency adjusting network (50) is mounted on the flexible sheet for selectively adjusting at least one of an impedance match and the peak sensitivity resonant frequency of the receiving coil. A preamplifier (52) amplifies the received signals prior to transmission on a cable (24). A selectively variable voltage source (70) applies a selectively adjustable DC bias voltage to the cable for selectively adjusting at least one of the impedance match and the LC resonant frequency of the receiving coil. The received signals are amplified by an amplifier (82) and processed by an image processor (30) to form man-readable images of the examined region of the patient for display on a video display (32) or the like.
摘要翻译：共振励磁线圈（C）在设置在已经产生主磁场和横向梯度的图像区域中的核中激发磁共振。柔性接收线圈（D）包括柔性塑料片（40），一个或多个环（20）粘附在柔性塑料片上以接收来自谐振核的信号。魔术贴带（46）将柔性片材和附接的线圈绑定成与待成像的患者部分的表面紧密一致。阻抗匹配或线圈共振频率调整网络（50）安装在柔性片上，用于选择性地调节接收线圈的阻抗匹配和峰值灵敏度谐振频率中的至少一个。前置放大器（52）在电缆（24）上传输之前放大所接收的信号。选择性可变电压源（70）向电缆施加选择性可调节的直流偏置电压，用于选择性地调节接收线圈的阻抗匹配和LC谐振频率中的至少一个。所接收的信号由放大器（82）放大并由图像处理器（30）处理，以形成用于在视频显示器（32）等上显示的被检查区域的人可读图像。

IPRDB

热门服务

关于我们

友情链接

联系方式