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公开(公告)号：US20080024128A1
公开(公告)日：2008-01-31
申请号：US11496557
申请日：2006-07-31
IPC分类号： G01V3/00
CPC分类号： G01R33/5617 , G01N24/081 , G01R33/445 , G01R33/448 , G01R33/56341
摘要： Methods and pulse sequences for facilitating nuclear magnetic resonance (NMR) measurements in grossly inhomogeneous fields. Methods and pulse sequences according to the invention may be used to accurately measure variables such as transverse relaxation time, longitudinal relaxation time, and diffusion, without the need for data at long recovery time, thereby allowing for faster measurements. In addition, methods and pulse sequences according to embodiment of the invention may allow simultaneous encoding of information in both the amplitude and the shape of echoes, so as to allow a single-shot measurement of multiple variables, e.g., both transverse relaxation time (from the decay of echo amplitudes) and longitudinal relaxation time (from the echo shape). CPMG detection may be used to overcome the often limited signal-to-noise ratio in grossly inhomogeneous fields.
摘要翻译： 用于促进在非常不均匀的场中进行核磁共振（NMR）测量的方法和脉冲序列。 根据本发明的方法和脉冲序列可以用于精确地测量诸如横向弛豫时间，纵向松弛时间和扩散的变量，而不需要在长恢复时间的数据，从而允许更快的测量。 此外，根据本发明的实施例的方法和脉冲序列可以允许在回波的幅度和形状两者中同时编码信息，以允许单次测量多个变量，例如横向弛豫时间（从 回波幅度的衰减）和纵向弛豫时间（从回波形状）。 可以使用CPMG检测来克服在非常不均匀场中经常受限的信噪比。
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公开(公告)号：US20100134104A1
公开(公告)日：2010-06-03
申请号：US12576307
申请日：2009-10-09
IPC分类号： G01R33/44
CPC分类号： G01R33/5617 , G01N24/081 , G01R33/445 , G01R33/448 , G01R33/56341
摘要： Methods and pulse sequences for facilitating nuclear magnetic resonance (NMR) measurements in grossly inhomogeneous fields. Methods and pulse sequences according to the invention may be used to accurately measure variables such as transverse relaxation time, longitudinal relaxation time, and diffusion, without the need for data at long recovery time, thereby allowing for faster measurements. In addition, methods and pulse sequences according to embodiment of the invention may allow simultaneous encoding of information in both the amplitude and the shape of echoes, so as to allow a single-shot measurement of multiple variables, e.g., both transverse relaxation time (from the decay of echo amplitudes) and longitudinal relaxation time (from the echo shape). CPMG detection may be used to overcome the often limited signal-to-noise ratio in grossly inhomogeneous fields.
摘要翻译： 用于促进在非常不均匀的场中进行核磁共振（NMR）测量的方法和脉冲序列。 根据本发明的方法和脉冲序列可以用于精确地测量诸如横向弛豫时间，纵向松弛时间和扩散的变量，而不需要在长恢复时间的数据，从而允许更快的测量。 此外，根据本发明的实施例的方法和脉冲序列可以允许在回波的幅度和形状两者中同时编码信息，以允许单次测量多个变量，例如横向弛豫时间（从 回波幅度的衰减）和纵向弛豫时间（从回波形状）。 可以使用CPMG检测来克服在非常不均匀场中经常受限的信噪比。
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公开(公告)号：US07852077B2
公开(公告)日：2010-12-14
申请号：US12576307
申请日：2009-10-09
IPC分类号： G01V3/00
CPC分类号： G01R33/5617 , G01N24/081 , G01R33/445 , G01R33/448 , G01R33/56341
摘要： Methods and pulse sequences for facilitating nuclear magnetic resonance (NMR) measurements in grossly inhomogeneous fields. Methods and pulse sequences according to the invention may be used to accurately measure variables such as transverse relaxation time, longitudinal relaxation time, and diffusion, without the need for data at long recovery time, thereby allowing for faster measurements. In addition, methods and pulse sequences according to embodiment of the invention may allow simultaneous encoding of information in both the amplitude and the shape of echoes, so as to allow a single-shot measurement of multiple variables, e.g., both transverse relaxation time (from the decay of echo amplitudes) and longitudinal relaxation time (from the echo shape). CPMG detection may be used to overcome the often limited signal-to-noise ratio in grossly inhomogeneous fields.
摘要翻译： 用于促进在非常不均匀的场中进行核磁共振（NMR）测量的方法和脉冲序列。 根据本发明的方法和脉冲序列可以用于精确地测量诸如横向弛豫时间，纵向松弛时间和扩散的变量，而不需要在长恢复时间的数据，从而允许更快的测量。 此外，根据本发明的实施例的方法和脉冲序列可以允许在回波的幅度和形状两者中同时编码信息，以允许单次测量多个变量，例如横向弛豫时间（从 回波幅度的衰减）和纵向弛豫时间（从回波形状）。 可以使用CPMG检测来克服在非常不均匀场中经常受限的信噪比。
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公开(公告)号：US07622919B2
公开(公告)日：2009-11-24
申请号：US11496557
申请日：2006-07-31
IPC分类号： G01V3/00
CPC分类号： G01R33/5617 , G01N24/081 , G01R33/445 , G01R33/448 , G01R33/56341
摘要： Methods and pulse sequences for facilitating nuclear magnetic resonance (NMR) measurements in grossly inhomogeneous fields. Methods and pulse sequences according to the invention may be used to accurately measure variables such as transverse relaxation time, longitudinal relaxation time, and diffusion, without the need for data at long recovery time, thereby allowing for faster measurements. In addition, methods and pulse sequences according to embodiment of the invention may allow simultaneous encoding of information in both the amplitude and the shape of echoes, so as to allow a single-shot measurement of multiple variables, e.g., both transverse relaxation time (from the decay of echo amplitudes) and longitudinal relaxation time (from the echo shape). CPMG detection may be used to overcome the often limited signal-to-noise ratio in grossly inhomogeneous fields.
摘要翻译： 用于促进在非常不均匀的场中进行核磁共振（NMR）测量的方法和脉冲序列。 根据本发明的方法和脉冲序列可以用于精确地测量诸如横向弛豫时间，纵向松弛时间和扩散的变量，而不需要在长恢复时间的数据，从而允许更快的测量。 此外，根据本发明的实施例的方法和脉冲序列可以允许在回波的幅度和形状两者中同时编码信息，以允许单次测量多个变量，例如横向弛豫时间（从 回波幅度的衰减）和纵向弛豫时间（从回波形状）。 可以使用CPMG检测来克服在非常不均匀场中经常受限的信噪比。
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