BROADBAND DECOUPLING PULSE TRAIN WITH INTERLEAVED PAUSES FOR MAGNETIC RESONANCE SPECTROSCOPY
    1.
    发明申请
    BROADBAND DECOUPLING PULSE TRAIN WITH INTERLEAVED PAUSES FOR MAGNETIC RESONANCE SPECTROSCOPY 有权
    用于磁共振光谱的宽带放大器的宽带解码脉冲串

    公开(公告)号:US20110267052A1

    公开(公告)日:2011-11-03

    申请号:US13141089

    申请日:2009-11-23

    IPC分类号: G01R33/44

    摘要: A magnetic resonance apparatus (10) includes a magnet (18) that generates a static magnetic field, e.g., 7T, a resonance excitation system (26, 30, 32) induces resonance in an observed nuclear species such as 13C or 31P. A decoupling delay generator (48) introduces pauses between adjacent pulses of a decoupling pulse train configured to decouple a coupled species such as 1H. An RF amplifier (32, 44) whose energy shortage capacity would be exceeded by the pulse train without the pauses amplifies the pulse train with the pauses. The pauses are sufficiently short that decoupling and Nuclear Overhauser Effect enhancement are not adversely affected, but long enough to provide recovery time to the RF amplifier, e.g., 0.2 msec.

    摘要翻译: 磁共振装置(10)包括产生静态磁场(例如7T)的磁体(18),共振激发系统(26,30,32)在观察到的核物质如13C或31P中引起共振。 解耦延迟发生器(48)引入解耦脉冲串的相邻脉冲之间的暂停,其被配置为使耦合的物质例如1H去耦。 一个RF放大器(32,44),其能量短缺容量将被脉冲串超过,而不会暂停,脉冲串将随着暂停放大。 暂停时间足够短,使得去耦和核超越效应增强不会受到不利影响,但长度足以为RF放大器提供恢复时间,例如0.2毫秒。

    Broadband decoupling pulse trains with interleaved pauses for magnetic resonance spectroscopy
    2.
    发明授权
    Broadband decoupling pulse trains with interleaved pauses for magnetic resonance spectroscopy 有权
    宽带去耦脉冲串与磁共振波谱的交错暂停

    公开(公告)号:US09069048B2

    公开(公告)日:2015-06-30

    申请号:US13141089

    申请日:2009-11-23

    摘要: A magnetic resonance apparatus includes a magnet that generates a static magnetic field, e.g., 7T, and a resonance excitation system that induces resonance in an observed nuclear species such as 13C or 31P. A decoupling delay generator introduces pauses between adjacent pulses of a decoupling pulse train configured to decouple a coupled species such as 1H. An RF amplifier whose energy shortage capacity would be exceeded by the pulse train without the pauses amplifies the pulse train with the pauses. The pauses are sufficiently short that decoupling and Nuclear Overhauser Effect enhancement are not adversely affected, but long enough to provide recovery time to the RF amplifier, e.g., 0.2 msec.

    摘要翻译: 磁共振装置包括产生静态磁场(例如7T)的磁体和在观察到的核物质如13C或31P中引起共振的共振激励系统。 解耦延迟发生器在解耦脉冲串的相邻脉冲之间引入暂停,其被配置为使耦合的物质例如1H去耦。 如果没有暂停的脉冲串能够超出能量短缺的RF放大器,则会在暂停时放大脉冲串。 暂停时间足够短,使得去耦和核超越效应增强不会受到不利影响,但长度足以为RF放大器提供恢复时间,例如0.2毫秒。

    Jumping around the center of k-space in annular sequential steps
    3.
    发明授权
    Jumping around the center of k-space in annular sequential steps 失效
    以环形顺序的步骤跳过k空间的中心

    公开(公告)号:US07489962B2

    公开(公告)日:2009-02-10

    申请号:US10572777

    申请日:2004-09-09

    IPC分类号: A61B5/05

    摘要: In a magnetic resonance imaging data acquisition method, k-space (100) is divided into a central region (102) disposed at k-space center and one or more annular surrounding regions (104, 106) having increasing distances from k-space center. The one or more annular surrounding regions include an outermost surrounding region (106) having a largest distance from k-space center. The k-space samples in the central region (102) are acquired. Subsequent to the acquiring of k-space samples in the central region, k-space samples are acquired in the one or more annular surrounding regions (104, 106). The k-space samples in the outermost surrounding region (106) are acquired last. The acquiring of k-space samples in at least the outermost surrounding region uses a row-by-row acquisition ordering in which each row of k-space samples acquired in the outermost surrounding region (106) completes a k-space plane.

    摘要翻译: 在磁共振成像数据采集方法中,k空间(100)被分成设置在k空间中心的中心区域(102)和与k空间中心距离增加的一个或多个环形周围区域(104,106) 。 一个或多个环形周围区域包括距离k-空间中心具有最大距离的最外周围区域(106)。 获取中心区域(102)中的k空间样本。 在中心区域获取k空间样本之后,在一个或多个环形周围区域(104,106)中获取k空间样本。 最外面的周边区域(106)中的k空间样本被最后获取。 在至少最外周围区域中获取k空间样本使用逐行采集排序,其中在最外周围区域(106)中获取的每一行k空间样本完成k空间平面。

    Self-adaptive tracking and phase encoding during data collection for contrast-enhanced MRA and dynamic agent uptake studies

    公开(公告)号:US06597937B2

    公开(公告)日:2003-07-22

    申请号:US09776964

    申请日:2001-02-05

    IPC分类号: A61B5055

    摘要: A magnetic resonance imaging method includes acquiring a baseline magnetic resonance image of a region of interest in the absence of a contrast agent and simulating an increase in image intensity of a subregion of interest within the region of interest which is subject to increased image intensity in the presence of a contrast agent. The magnetic resonance k-space signal intensity is correlated with contrast agent concentration in the subregion and a contrast agent is administered to the subject. As k-space data for the region of interest is acquired, the signal intensity is monitored to derive contrast agent concentration information. When the peak contrast agent concentration is detected from the monitored k-space data signal intensity, the phase encoding is adjusted so that k-space data with zero phase encoding is acquired. In a further aspect, a magnetic resonance imaging apparatus is also provided.