Partial flip angle MR imaging.

Partial flip angle MR imaging.
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部分翻转角磁共振成像。

DOI:
10.1148/radiology.162.2.3797669
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发表时间:
1987
期刊:
影响因子:
19.7
通讯作者:
Kaufman,L
Kaufman,L
中科院分区:
医学1区
文献类型:
--
作者:
Mills,TC;Ortendahl,DA;Hylton,NM;Crooks,LE;Carlson,JW;Kaufman,L

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相似文献

理论分析预测,在检查T1值升高的病变时,以部分(小于90度)翻转角进行磁共振(MR)成像可以将成像时间减少两到四倍。这种时间节省是因为当使用部分翻转执行成像时减少了重复时间(Tr)。部分翻转磁共振成像还可以提高快速人体成像的信噪比(S/N)。在这项研究中,分析工具被用来预测短TR、部分翻转序列的图像对比度和S/N。分析工作预测的短TR、部分翻转序列的实验实现将是最佳的,支持分析预测并证明其有效性。部分翻转磁共振成像只适用于当信号差值与噪声之比超过常规MR图像的阈值时才能缩短成像时间。部分翻转序列可以在头部和身体的磁共振成像中发挥优势,通过理论分析可以预测观察到的效果。
Theoretical analysis predicts that performing magnetic resonance (MR) imaging with partial (less than 90 degrees) flip angles can reduce imaging times two- to fourfold when lesions with elevated T1 values are being examined. This time savings occurs because repetition time (TR) is reduced when imaging is performed with partial flips. Partial flip MR imaging can also improve signal-to-noise ratio (S/N) in fast body imaging. For this study, analytical tools were used to predict image contrast and S/N for short TR, partial flip sequences. Experimental implementation of the short TR, partial flip sequences that analytical work had predicted would be optimal supported the analytical predictions and demonstrated their validity. Partial flip MR imaging is applicable to reducing imaging time only when the ratio of signal differences to noise exceeds threshold values in conventional MR images. Partial flip sequences can be used to advantage in MR imaging of both the head and the body, and the observed effects are predictable through theoretical analysis.
DOI: 10.1097/00004424-198702000-00014
发表时间: 1987-02-01
影响因子: 6.7
作者:
CROOKS, LE;HYLTON, NM;KAUFMAN, L
通讯作者: KAUFMAN, L
DOI: 10.1148/radiology.153.2.6091173
发表时间: 1984
期刊: Radiology
影响因子: 19.7
作者:
Ortendahl,DA;Hylton,N;Kaufman,L;Watts,JC;Crooks,LE;Mills,CM;Stark,DD
通讯作者: Stark,DD
DOI: 10.1055/s-2008-1041445
发表时间: 1986-03-01
影响因子: 2.7
作者:
MARAVILLA, KR;SORY, WC
通讯作者: SORY, WC
DOI: 10.1148/radiology.153.2.6484175
发表时间: 1984
期刊: Radiology
影响因子: 19.7
作者:
R. T. Droege;S. N. Wiener;M. Rzeszotarski
通讯作者: M. Rzeszotarski
快速傅立叶成像
DOI: 10.1002/mrm.1910020304
发表时间: 1985
影响因子: 3.3
作者:
C. Uijen;J. H. Boef;F. J. J. Verschuren
通讯作者: F. J. J. Verschuren