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MRI method to determine signature index of observation object from signal pattern obtained by gradient magnetic field pulse MRI
MRI method to determine signature index of observation object from signal pattern obtained by gradient magnetic field pulse MRI
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机译：MRI方法确定梯度磁场脉冲MRI获得的信号模式观察对象的签名索引
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摘要
A method for determining a signature index of an observation target tissue includes a step (12) of providing a general attenuation model of a gradient magnetic field pulse MRI attenuation signal S (b), and a reference model parameter vector (pR ( i)) providing step (14). Based on the variation over the b value of the determined (16) partial differential sensitivity dSi (b) of the model attenuation signal S (b) for each model parameter p (i) in the neutral state attenuation signal SN (b) A discrete and small set of b values is constructed (18) and a series of MRI images of the tissue to be observed are acquired using the noted b values (20). Next, for each voxel, the voxel V signature index (sADC (V), Sdist (V), SCdist (V), Snl (V), SI (V)) is obtained with the attention b value. And a scalar function depending on the distance from the signal pattern in the reference state of the tissue at the same attention b value (22). An apparatus for implementing such a method is configured.
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