公开(公告)号：US09057767B2

公开(公告)日：2015-06-16

申请号：US13465864

申请日：2012-05-07

申请人： J. Rock Hadley ,  Dennis L. Parker ,  Glen R. Morrell

发明人： J. Rock Hadley ,  Dennis L. Parker ,  Glen R. Morrell

IPC分类号： G01V3/00 ,  G01R33/345 ,  G01R33/34 ,  G01R33/3415

CPC分类号： G01R33/3456 ,  G01R33/34 ,  G01R33/34076 ,  G01R33/3415

摘要： Systems, devices and methods provide an RF coil which produces a field having linear phase variation across an imaging volume. In one embodiment, a coil comprises multiple microstrip elements configured to have an increased effective electrical length. This increase in electrical length allows for a larger linear phase shifts over the length of the microstrip element which in turn increases linear phase variation capabilities. This may be accomplished by increasing the effective dielectric properties of the microstrip element. Increasing the effective dielectric may be accomplished by utilizing distributed capacitors along the length of a microstrip element (e.g. lumped element capacitors), by altering the materials used to fabricate the microstrip element, etc. Additionally, increasing the effective dielectric may be accomplished using a combination of these means. Embodiments may further enable linear phase variation along the imaging volume at high frequencies, such as frequencies utilized for 3 T and above MRI devices.

摘要翻译： 系统，装置和方法提供RF线圈，其产生在成像体积上具有线性相位变化的场。 在一个实施例中，线圈包括配置成具有增加的有效电长度的多个微带元件。 电长度的这种增加允许在微带线元件的长度上产生较大的线性相移，这又增加了线性相位变化能力。 这可以通过增加微带元件的有效介电性能来实现。 通过改变用于制造微带线元件的材料等，通过利用沿着微带元件（例如集总元件电容器）的长度的分布式电容器来实现增加有效电介质。另外，增加有效电介质可以使用组合 的这些手段。 实施例还可以在诸如用于3T及以上MRI装置的频率的高频下沿成像体积进行线性相位变化。

公开(公告)号：US20120280685A1

公开(公告)日：2012-11-08

申请号：US13465864

申请日：2012-05-07

申请人： J. Rock Hadley ,  Dennis L. Parker ,  Glen R. Morrell

发明人： J. Rock Hadley ,  Dennis L. Parker ,  Glen R. Morrell

IPC分类号： G01R33/341 ,  G01R33/54

CPC分类号： G01R33/3456 ,  G01R33/34 ,  G01R33/34076 ,  G01R33/3415

摘要： Systems, devices and methods provide an RF coil which produces a field having linear phase variation across an imaging volume. In one embodiment, a coil comprises multiple microstrip elements configured to have an increased effective electrical length. This increase in electrical length allows for a larger linear phase shifts over the length of the microstrip element which in turn increases linear phase variation capabilities. This may be accomplished by increasing the effective dielectric properties of the microstrip element. Increasing the effective dielectric may be accomplished by utilizing distributed capacitors along the length of a microstrip element (e.g. lumped element capacitors), by altering the materials used to fabricate the microstrip element, etc. Additionally, increasing the effective dielectric may be accomplished using a combination of these means. Embodiments may further enable linear phase variation along the imaging volume at high frequencies, such as frequencies utilized for 3 T and above MRI devices.

摘要翻译： 系统，装置和方法提供RF线圈，其产生在成像体积上具有线性相位变化的场。 在一个实施例中，线圈包括配置成具有增加的有效电长度的多个微带元件。 电长度的这种增加允许在微带线元件的长度上产生较大的线性相移，这又增加了线性相位变化能力。 这可以通过增加微带元件的有效介电性能来实现。 通过改变用于制造微带线元件的材料等，通过利用沿着微带元件（例如集总元件电容器）的长度的分布式电容器来实现增加有效电介质。另外，增加有效电介质可以使用组合 的这些手段。 实施例还可以在诸如用于3T及以上MRI装置的频率的高频下沿成像体积进行线性相位变化。

公开(公告)号：US5578921A

公开(公告)日：1996-11-26

申请号：US370907

申请日：1995-01-10

申请人： Glen R. Morrell

发明人： Glen R. Morrell

IPC分类号： G01R33/48 ,  G01R33/20

CPC分类号： G01R33/446

摘要： Using 3-D spectral-spatial excitation, the center frequency of the spectral passband can be varied as a function of two spatial coordinates. Such variation could be tailored to field map data to compensate for B.sub.0 shifts. The 3-D excitation has 3-D spiral trajectories in k-space.

摘要翻译： 使用3-D光谱空间激励，光谱通带的中心频率可以作为两个空间坐标的函数而变化。 这样的变化可以针对场地图数据来补偿B0偏移。 3-D激发在k空间中具有3-D螺旋轨迹。