MAGNETIC RESONANCE IMAGING DEVICE

摘要

While contrast MRA measurement is being carried out, the concentration of the contrast agent is made to reach its peak when the low-frequency component is measured by controlling the measurement order of the k-space, considering the distance from the origin. The measurement points in the k-space are divided into two groups. When the concentration of the contrast agent in a target vessel becomes high, the measurement of the first group is started. For the first group, the sample points are sampling-controlled from the high-frequency component toward the low-frequency component in such a way that the distance from the origin gradually decreases. For the other group to be measured consecutively, the sample points on the opposite side of the origin are sampling-controlled from the low-frequency component toward the high-frequency component in such a way that the distance from the origin gradually increases. The influence of the error of the imaging timing in the contrast MRA measurement is reduced, and the whole vessel is drawn in high contrast. The image of an artery can be selectively drawn.