公开(公告)号：US20230255507A1

公开(公告)日：2023-08-17

申请号：US18165961

申请日：2023-02-08

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Ryohei TAKAYANAGI ,  Takaya MORI ,  Kagami FUJITA ,  Akihiro TAGUCHI ,  Masao YUI

IPC: A61B5/055 ,  A61B5/00

CPC classification number: A61B5/055 ,  A61B5/72

Abstract: A magnetic resonance imaging apparatus includes sequence controlling circuitry configured: to obtain, during a time period after excitation of a first nuclide in a hyperpolarized state but no later than before obtainment of a first magnetic resonance signal from the first nuclide, a second magnetic resonance signal from a second nuclide that is different from the first nuclide and is in a non-hyperpolarized state, by exciting the second nuclide; and to control each of gradient magnetic field waveforms so as to cause both a first sum indicating a sum of application amounts of a gradient magnetic field related to the excitation of the second nuclide and a second sum indicating a sum of application amounts of a gradient magnetic field related to the obtainment of the second magnetic resonance signal to be close to zero, no later than before the obtainment of the first magnetic resonance signal.

公开(公告)号：US20220137171A1

公开(公告)日：2022-05-05

申请号：US17513083

申请日：2021-10-28

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Ryohei TAKAYANAGI ,  Hiroki KONDO ,  Masaaki UMEDA ,  Naoyuki FURUDATE

IPC: G01R33/483 ,  G01R33/54

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry configured, on a basis of one or both of (A) a parameter related to applying one of inversion and flip pulses and (B) an intensity of a slice selecting gradient magnetic field applied together with the one of the pulses in relation to selecting a slice to which the one of the pulses is applied, to determine one or both of (A) a parameter related to applying the other of the inversion and (B) flip pulses; and an intensity of the slice selecting gradient magnetic field applied together with the other of the pulses in relation to selecting a slice to which the other of the pulses is applied.