发明名称 |
B-value calculation and correction using a linear segment gradient waveform model |
摘要 |
A technique for calculating actual b-values in a diffusion weighted magnetic resonance imaging system and of adjusting the observed b-value until it is within a tolerance range of the prescribed b-value. A diffusion weighted image with the desired diffusion sensitivity may then be produced. Calculation of the actual b-value is accomplished by integrating the linear segments of the gradient waveform. Adjustment of observed b-value is accomplished by initially scaling the diffusion lobe amplitude and comparing a recalculated b-value to the prescribed b-value. Additional adjustment is provided by means of a numeric search iteratively performed until the recalculated b-value is within tolerance of the prescribed b-value.
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申请公布号 |
US6670812(B1) |
申请公布日期 |
2003.12.30 |
申请号 |
US20020243162 |
申请日期 |
2002.09.13 |
申请人 |
GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY, LLC |
发明人 |
MOCK BRYAN J.;MICHELICH CHARLES R. |
分类号 |
G01R33/28;A61B5/055;G01R33/563;(IPC1-7):G01V3/00 |
主分类号 |
G01R33/28 |
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地址 |
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