Patient safety, and local and global SAR estimation of real-time for improved scanning performance.

摘要

Peculiar energy absorptance (SAR) the calculation processor (36), it calculates section SAR and general situation SAR in the method and the device in order to make the increase of the RF duty cycle in high magnetic field MR scanning possible, calculates also the spatial SAR map. (It was based on the E boundary) it depends on using the data which is levelled beforehand, SAR presumption of high speed and high accuracy becomes possible depending upon efficient actualization. For example by incorporating the further information like patient position, for example as for SAR calculation precision, generally known Q queue, (, it is possible to increase SAR calculation precision by using the information where patient peculiarity was beforehand calculated separate on the basis of the bio mesh). Optionally, the sequence controller (24) general SAR optimum RF pulse is formed. After optimum RF pulse is impressed, SAR and its spatial distribution are required. Also the SAR hot spot is required. Q queue within the appropriate radius which centers the hot spot to attach is levelled, weight is done, to general Q queue is added. After general Q queue is renewed, new optimum RF pulse is drawn up. In order to make SAR smallest focus, one of processes or it is possible to repeat plural.