| 摘要 |
<p>A separative imaging is provided to obtain separate images of water and fat using quantitative MRI while eliminating separation error caused by non-uniform magnetic field. When a spin echo signal is received, there are carried out the S0 scanning in which the phases of magnetization vectors of water and fat are in agreement with each other, the S1 scanning in which the phases of magnetization vectors are different by 180 DEG and the S2 scanning in which the phases of magnetization vectors are different by 90 DEG . A quantitative difference between water and fat is calculated from the image data of the S1 and S2 scannings, and a separation image of water and fat is obtained from the absolute value images of the S0 and S1 scannings. According to the invention which uses absolute value images of the S0 and S1 scannings, there does not develop any separation error caused by deviation in the phase that stems from non-uniform magnetic field. Further, the phase term due to non-uniform static magnetic field is removed and a quantitative difference between water and fat is calculated based on the image data of the S1 and S2 scannings. Water and fat component are identified for the separation images found from the absolute value data.</p> |
