公开(公告)号：US5492122A

公开(公告)日：1996-02-20

申请号：US228348

申请日：1994-04-15

申请人： Terry Button ,  Susan Barbour ,  Justine D. Cermignani ,  Eric Crugnale ,  Robert E. McGill ,  Glenn Spacht

发明人： Terry Button ,  Susan Barbour ,  Justine D. Cermignani ,  Eric Crugnale ,  Robert E. McGill ,  Glenn Spacht

IPC分类号： A61N1/40 ,  A61N5/02 ,  G01R33/48 ,  A61B5/055

CPC分类号： G01R33/4804 ,  A61N1/403 ,  A61N5/02

摘要： A hyperthermia treatment apparatus includes an annular radio frequency (RF) antenna array with bolus that is compatible with a magnetic resonance imaging (MRI) machine. Antenna elements polarized parallel to the axis of the cylinder are used for forming a Specific Absorption Ratio (SAR) map as well as for directing the energy to accomplish hyperthermia. The array may be dynamically controlled to focus energy at any specified region within the cylinder. The array is positioned inside an MRI machine and is tuned to the machine's hydrogen resonant frequency. For treatment planning, the array is employed to form an SAR map via RF current density imaging. Using this map, array phase, amplitude, and temporal weighting are optimized until the SAR maxima is congruent with the treatment volume. For treatment, RF radiation is applied to the subject to induce heating of the treatment volume using these optimal array parameters. Temperature is periodically determined via noninvasive MRI methods (i.e., diffusion imaging, T.sub.1 map, etc.) in order to obtain an image that includes isotherms from which the pattern of heating can be observed. Feedback is provided such that adjustment may be made to compensate for bioheat transfer.

摘要翻译： 热疗治疗装置包括具有与磁共振成像（MRI）机器兼容的推注的环形射频（RF）天线阵列。 用于平行于气缸轴线偏振的天线元件用于形成比吸收比（SAR）图以及用于引导能量来实现热疗。 可以动态地控制阵列以将能量聚焦在气缸内的任何指定区域。 阵列位于MRI机器内部，并被调谐到机器的氢共振频率。 对于治疗计划，阵列用于通过RF电流密度成像形成SAR图。 使用该图，优化阵列相位，幅度和时间权重，直到SAR最大值与处理量一致。 对于治疗，使用这些最佳阵列参数将RF辐射施加到受试者以诱导治疗体积的加热。 通过非侵入性MRI方法（即，扩散成像，T1图等）周期性地确定温度，以便获得包括可观察到加热模式的等温线的图像。 提供反馈，使得可以进行调整以补偿生物热转移。

公开(公告)号：US5462055A

公开(公告)日：1995-10-31

申请号：US294500

申请日：1994-08-23

申请人： James A. Casey ,  Robert E. McGill

发明人： James A. Casey ,  Robert E. McGill

IPC分类号： A61N1/40 ,  A61N2/02 ,  G01R33/36 ,  G01R33/48 ,  A61B5/055

CPC分类号： A61N1/403 ,  A61N2/02 ,  G01R33/4804 ,  G01R33/34076 ,  G01R33/36 ,  G01R33/4808

摘要： An MRI machine RF body coil is arranged so that it can also function as a hyperthermia treatment apparatus by arranging the RF body coil as an array of individual antenna element connected to each other by individually controllable switches and feedthrough elements.

摘要翻译： MR机RF体线圈被布置成使得其也可以通过将RF体线圈布置为通过单独可控的开关和馈通元件彼此连接的单独天线元件的阵列来用作热疗治疗设备。

公开(公告)号：US5361764A

公开(公告)日：1994-11-08

申请号：US87905

申请日：1993-07-09

申请人： Francis D. Reynolds ,  Joseph S. Baran ,  Robert P. Bisey ,  Terry Button ,  Robert E. McGill ,  Nathan I. Nalven ,  Matthew A. Salvitti

发明人： Francis D. Reynolds ,  Joseph S. Baran ,  Robert P. Bisey ,  Terry Button ,  Robert E. McGill ,  Nathan I. Nalven ,  Matthew A. Salvitti

IPC分类号： G01R33/34 ,  G01R33/36 ,  A61B5/055

CPC分类号： G01R33/34061 ,  G01R33/3657 ,  G01R33/3628

摘要： A magnetic resonance imaging receiver system for producing high resolution images of the foot and ankle regions of a human subject. The magnetic resonance imaging receiver comprises an antenna for receiving resonance signals produced by a magnetic resonance imaging, radio frequency excitation magnetic apparatus, a free standing foot cradle assembly for supporting and rigidly holding the foot and ankle of the subject, and a tuning/impedance matching circuit for providing for the maximum transfer of radio frequency energy from the antenna to the receiver unit in the magnetic resonance imaging, radio frequency excitation magnet apparatus. The system utilizes fixed local coils which operate in the receive only mode for receiving electromagnetic signals from resonating nuclei produced by a whole body MRI scanner system or the like to produce high quality images.

摘要翻译： 一种用于产生人类受试者的脚和脚踝区域的高分辨率图像的磁共振成像接收器系统。 磁共振成像接收机包括用于接收由磁共振成像产生的共振信号的天线，射频激励磁性装置，用于支撑并刚性地保持被检体的脚和脚踝的独立支架组件，以及调谐/阻抗匹配 用于在磁共振成像，射频激励磁体装置中提供从天线到接收器单元的射频能量的最大传输的电路。 该系统利用固定本地线圈，其以仅接收模式操作，用于从由全身MRI扫描仪系统等产生的共振核接收电磁信号以产生高质量图像。