| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To extract an abnormal area and a mismatch area of both images in brain perfusion image and diffusion-weighted image, using MRI, of acute phase cerebral infarction, and to visualize a signal change of an affected side to an unaffected side and analyze quantitatively. <P>SOLUTION: The left and right of brain perfusion image or diffusion-weighted image is divided, and one side is reversed and subtracted from another side or divided, then a normal tissue is inhibited and an abnormal area can be extracted even if an original image has high contrast. The difference of the left and the right of Cmax image wherein the concentration of contrast medium is maximum is compared in addition to Time-To-Peak image, and the affected/unaffected side can be determined without depending on the shape ofΔR2* curve. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
