MAGNETIC RESONANCE IMAGING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an MRI device capable of accurately obtaining and imaging the temperature change of an examinee body. SOLUTION: An arithmetic means for reconstituting images based on NMR signals (complex signals) from the examinee body extracts (301 and 311) an examinee body part in complex images obtained from the complex signals, calculates (302 and 312) space phase distribution based on the complex data of the extracted part, performs (304 and 314) arc tangent aliasing correction for space phase distribution data and calculates (305 and 315) temperature distribution based on the space phase distribution data after the correction. Plural measurements are performed at the different time t1 and t2 and the space distribution of the temperature change is calculated (320) from a difference between data obtained by the plural measurements. The space distribution image of the temperature change is composed with tissue images and displayed at a display means (321). Background noise and false images by arc tangent aliasing are removed and highly accurate temperature change images are obtained.