US 12,493,089 B2
Magnetic resonance imaging apparatus
Yutaka Machii, Nasushiobara (JP); Naoyuki Furudate, Otawara (JP); and Motohiro Miura, Yaita (JP)
Assigned to Canon Medical Systems Corporation, Otawara (JP)
Filed by Canon Medical Systems Corporation, Otawara (JP)
Filed on Sep. 1, 2023, as Appl. No. 18/459,516.
Claims priority of application No. 2022-146422 (JP), filed on Sep. 14, 2022.
Prior Publication US 2024/0085507 A1, Mar. 14, 2024
Int. Cl. G01R 33/54 (2006.01); G01R 33/385 (2006.01)
CPC G01R 33/543 (2013.01) [G01R 33/385 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A magnetic resonance imaging apparatus, comprising:
a processing circuit configured to
predict, based on an imaging sequence of magnetic resonance imaging and a relationship between a driving frequency of a gradient field coil and one of a magnet internal pressure and a magnet temperature of a static field magnet, the one of the magnet internal pressure and the magnet temperature at a time of execution of the imaging sequence,
adjust the imaging sequence based on a prediction result, and
execute the adjusted imaging sequence,
wherein the processing circuit is further configured to calculate, using an equivalent circuit to the one of the magnet internal pressure and the magnet temperature, a current value flowing to the equivalent circuit based on the imaging sequence, and predict the one of the magnet internal pressure and the magnet temperature at the time of the execution of the imaging sequence based on the current value
the equivalent circuit is generated based on the relationship, and includes a first circuit connected to a power supply equivalent to a gradient field power supply and having a self inductance, and a second circuit having a mutual inductance to the first circuit and resonating with respect to the first circuit, and
a resonance characteristic of the second circuit is set based on the relationship.