| 摘要 |
<p>An MRI apparatus has an operating means for reconstructing images based on NMR signals (complex signals) emitted from an object to be examined and the operating means is provided with the following operation functions. It extracts an object part from a complex image obtained from the complex signals (301, 311), calculates a spatial phase distribution based on the complex data of the extracted part (302, 312), performs arctangent aliasing correction for the spatial phase distribution data (304, 314), and calculates a temperature distribution based on the corrected spatial phase distribution data (305, 315). Plural measurements are performed at different times t1, t2 and a spatial distribution of temperature changes is calculated from the difference between data obtained in these measurements (320). The spatial distribution of temperature changes is combined with a tissue image and displayed on a display means (321). Artifacts caused by a background noise or arctangent aliasing can be eliminated and a highly precise temperature change image can be obtained. <IMAGE></p> |
