Patent ID: 11899086
Assignee: CANON MEDICAL SYSTEMS CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A magnetic resonance imaging method implemented by a magnetic resonance imaging apparatus, the magnetic resonance imaging method comprising:
a process performed by sequence controlling circuitry to execute (i) a first pulse sequence in which a spatially selective Inversion recovery (IR) pulse and a spatially non-selective IR pulse are applied, and subsequently a Cartesian acquisition is performed when a first Inversion Time (TI) period has elapsed, and a radial acquisition is performed after the Cartesian acquisition, and (ii) a second pulse sequence in which the spatially non-selective IR pulse is applied without applying the spatially selective IR pulse, and subsequently a Cartesian acquisition is performed when the first TI period has elapsed, and a radial acquisition is performed after the Cartesian acquisition, while varying the first TI period, with respect to a plurality of first TI periods;
a process performed by processing circuitry to calculate a second TI period to be used in a third pulse sequence and a fourth pulse sequence, based on data obtained from the first pulse sequence and the second pulse sequence;
a process performed by the sequence controlling circuitry to execute (iii) the third pulse sequence in which the spatially selective IR pulse and the spatially non-selective IR pulse are applied, and subsequently a Cartesian acquisition is performed when the second TI period has elapsed, and a radial acquisition is performed after the Cartesian acquisition, and (iv) the fourth pulse sequence in which the spatially non-selective IR pulse is applied without applying the spatially selective IR pulse, and subsequently a Cartesian acquisition is performed when the second TI period has elapsed, and a radial acquisition is performed after the Cartesian acquisition; and
a process performed by the processing circuitry to generate a magnetic resonance image of an imaged region based on data obtained from the third pulse sequence and the fourth pulse sequence,
wherein, the method further comprises a process performed by the processing circuitry to calculate, as an index, with respect to the imaged region, at least one selected from among: a peak signal value, a peak flow time, an arterial transit time, and a blood flow volume, based on the data obtained from the third pulse sequence and the fourth pulse sequence,
the imaged region is a region in a brain, and
the method further comprises a process performed by the processing circuitry to predict an abnormality in a perforator branch based on the index.