MAGNETIC RESONACE IMAGING APPARATUS AND CONTROL METHOD THEREFOR

摘要

In order to provide a magnetic resonance imaging apparatus capable of calculating the amount of absorption of electromagnetic waves into the object with high accuracy, the magnetic resonance imaging apparatus includes: a calculation means for calculating the amount of absorption of electromagnetic waves into the object upon the emission of RF pulses in a part of the object or a bed position where imaging is scheduled; a means for setting imaging conditions, in which the calculated amount of absorption satisfies conditions of the specified value of the amount of absorption of electromagnetic waves, from the relationship between the calculated amount of absorption and the specified value of the amount of absorption of electromagnetic waves; and a bed control device that controls a top plate according to the set imaging conditions.

主权项

1. A magnetic resonance imaging apparatus, comprising:
a bed including a top plate for moving an object placed thereon; a magnetic field generation device that generates a magnetic field in an imaging space where imaging of the object is performed; an irradiation coil that generates RF pulses to be emitted to the object; an image generation device that detects an NMR signal generated by the object and generates an MRI image based on the detected NMR signal; an input and output device configured to input an imaging position or imaging conditions of the object or to display the imaging position or the imaging conditions; a storage device that stores data regarding an absorption rate of electromagnetic waves; and a control device that calculates an amount of absorption of electromagnetic waves of the object upon emission of the RF pulses at the input imaging position based on the data regarding the absorption rate of electromagnetic waves read from the storage device, determines whether or not the calculated value satisfies conditions of a specified value regarding absorption of electromagnetic waves, and controls an imaging operation at the imaging position in accordance with data indicating the imaging conditions or the imaging position determined that the amount of absorption of electromagnetic waves satisfies the conditions of the specified value.