Patent ID: 9510770
Filing Date: 2016-12-06
CPC Classification: A61B,G01R

Claim Text:
1. A nuclear magnetic resonance imaging apparatus comprising: a static magnetic field generator configured to generate a static magnetic field in a space where an object is placed; a gradient magnetic field application section configured to apply a gradient magnetic field to the object; a high frequency magnetic field generator configured to apply an RF pulse with a magnetic resonance frequency to the object; a signal detector configured to detect an echo signal generated from the object; an image reconstruction section configured to reconstruct an image using the detected echo signal; and a controller configured to control the gradient magnetic field application section, the high frequency magnetic field generator, and the signal detector, wherein the controller estimates a partial body SAR regarding a part of the object by calculating an amount of the echo signal received by the signal detector and generated from the part of the object expressed by ( calculating a ratio between the signal generated from the part of the object and the signal generated from the entire wide region expressed by α=S h /S b , and calculating energy absorbed into the part of the object using the ratio of the signals, wherein a head region is defined by L head , and {right arrow over (r)} is a position vector, f −1 is a function determined by an imaging function, MRIsignal ({right arrow over (r)}) is an MRI signal strength of {right arrow over (r)}.