Magnetic resonance imaging apparatus and magnetic resonance imaging method

摘要

A magnetic resonance imaging apparatus includes a collecting unit, a specifying unit, an acquiring unit and a calculating unit. The collecting unit collects a plurality of fluid images that are images of a fluid traveling though a subject. The specifying unit specifies a distance traveled by the fluid by using a difference image between a reference image that is one of the fluid images and each fluid image. The acquiring unit acquires an elapsed time corresponding to the traveled distance from pulse sequence information that is used to collect the fluid images. The calculating unit calculates a flow velocity of the fluid by dividing the traveled distance by the elapsed time.

主权项

1. A magnetic resonance imaging (MRI) apparatus comprising
MRI gantry components including static and gradient magnetic field generators, at least one radio frequency (RF) coil coupled to an imaging volume, at least one RF transmitter, at least one RF receiver and at least one control computer having a processor and memory configured to control said gantry components so as to effect operations including: collecting a plurality of fluid images that are MR images of a fluid traveling through a subject, each of said MR images having been acquired by execution of an MRI pulse sequence at a different cardiac phase; specifying a traveled distance of the fluid between different cardiac phases by using a difference image between a reference image that is one of the fluid images and each other fluid image; acquiring an elapsed time corresponding to the traveled distance of the fluid between different cardiac phases based on MRI pulse sequence information that was used to collect the fluid images at said different cardiac phases; and calculating a flow velocity of the fluid for each said different cardiac phase by dividing the traveled distance by the elapsed time for each said different cardiac phase, wherein the elapsed time is an elapsed time in which MR signals with which the center part of a k space is filled are collected.