| 摘要 |
<p>A partial region in an imaged slice is two-dimensionally excited by applying an oscillating gradient magnetic field in two or three axial directions together with RF thus to conduct an MRSI. At a preprocessing step, a scout image is formed, an ROI is interactively set on the image, and an RF modulating waveform is automatically generated by two-dimensional Fourier transform of an ROI shape, and a measurement matrix for the smallest square covering the ROI is automatically generated. By the MRSI, the RF is modulated with the RF modulating waveform generated at the preprocessing step to measure an image matrix formed at the preprocessing step. Since an unnecessary portion such as a fat portion can be avoided precisely along its shape and only necessary portions are excited, a metabolic substance image from which unnecessary signals are completely eliminated can be generated. Since a desired ROI is inputted interactively on a scout image, the ROI can be simply set. The measurement time can be shortened by generating a square measurement matrix.</p> |
