公开(公告)号：US08427154B2

公开(公告)日：2013-04-23

申请号：US12758151

申请日：2010-04-12

申请人： Rares Salomir ,  Jean-Noel Hyacinthe ,  Viallon Magalie

发明人： Rares Salomir ,  Jean-Noel Hyacinthe ,  Viallon Magalie

IPC分类号： G01V3/00

CPC分类号： G01R33/4814 ,  G01R33/4804 ,  G01R33/5611 ,  G01R33/5616

摘要： In a method and an apparatus for magnetic resonance guided high intensity focused ultrasound (HIFU), precise localization of the focal point of the HIFU is determined by imaging an examination subject in parallel with GRE sequences that respectively include a positive monopolar gradient pulse and a negative monopolar gradient pulse, that respectively encode the acoustic radiation force (ARF)-induced phase shift that is induced by the simultaneous activation of HIFU during the sequences. A GRE phase image is reconstructed from each acquisition sequence, and a difference image is formed between the two GRE phase images, from which the HIFU focal point is determined. An average image is formed of the two GRE phase images from which PRFS temperature map is determined simultaneously to ARFI map. The use of parallel imaging and the use of partial Fourier reconstruction for reconstructing the GRE phase images allows the data to be acquired sufficiently rapidly so as to minimize the adverse effect of tissue heating that occurs with conventional longer-duration, and repetitious, techniques.

摘要翻译： 在用于磁共振引导的高强度聚焦超声（HIFU）的方法和装置中，HIFU的焦点的精确定位是通过将检查对象与分别包括正单极梯度脉冲和负的单极梯度脉冲和负的 单极梯度脉冲，分别编码在序列期间由HIFU的同时激活诱导的声辐射力（ARF）诱导的相移。 从每个采集序列重建GRE相位图像，并且在确定HIFU焦点的两个GRE相位图像之间形成差分图像。 平均图像由两个GRE相位图像形成，PRFS温度图与ARFI图同时确定。 使用并行成像和使用部分傅里叶重构来重建GRE相位图像允许足够快速地获取数据，以便最小化传统的较长持续时间和重复技术发生的组织加热的不利影响。

公开(公告)号：US20110248714A1

公开(公告)日：2011-10-13

申请号：US12758151

申请日：2010-04-12

申请人： Rares Salomir ,  Jean-Noel Hyacinthe ,  Viallon Magalie

发明人： Rares Salomir ,  Jean-Noel Hyacinthe ,  Viallon Magalie

IPC分类号： G01R33/44

CPC分类号： G01R33/4814 ,  G01R33/4804 ,  G01R33/5611 ,  G01R33/5616

摘要： In a method and an apparatus for magnetic resonance guided high intensity focused ultrasound (HIFU), precise localization of the focal point of the HIFU is determined by imaging an examination subject in parallel with GRE sequences that respectively include a positive monopolar gradient pulse and a negative monopolar gradient pulse, that respectively encode the acoustic radiation force (ARF)-induced phase shift that is induced by the simultaneous activation of HIFU during the sequences. A GRE phase image is reconstructed from each acquisition sequence, and a difference image is formed between the two GRE phase images, from which the HIFU focal point is determined. An average image is formed of the two GRE phase images from which PRFS temperature map is determined simultaneously to ARFI map. The use of parallel imaging and the use of partial Fourier reconstruction for reconstructing the GRE phase images allows the data to be acquired sufficiently rapidly so as to minimize the adverse effect of tissue heating that occurs with conventional longer-duration, and repetitious, techniques.

摘要翻译： 在用于磁共振引导的高强度聚焦超声（HIFU）的方法和装置中，HIFU的焦点的精确定位是通过将检查对象与分别包括正单极梯度脉冲和负的单极梯度脉冲和负的 单极梯度脉冲，分别编码在序列期间由HIFU的同时激活诱导的声辐射力（ARF）诱导的相移。 从每个采集序列重建GRE相位图像，并且在确定HIFU焦点的两个GRE相位图像之间形成差分图像。 平均图像由两个GRE相位图像形成，PRFS温度图与ARFI图同时确定。 使用并行成像和使用部分傅里叶重构来重建GRE相位图像允许足够快速地获取数据，以便最小化传统的较长持续时间和重复技术发生的组织加热的不利影响。