Magnetic resonance imaging apparatus

Abstract

The invention provides a magnetic resonance imaging apparatus. The apparatus includes a unit which acquires, by a first sequence, an MR signal before administration of a contrast agent and which also acquires, by a second sequence, an MR signal after the administration, the first sequence dephasing a magnetization after RE excitation to make a greater signal reduction in a first signal component regarding a fluid flowing within a first range than in a second signal component regarding the fluid flowing within a second less than the first range, the second sequence bringing the MR signal afterthe administration to a level corresponding to the concentration of the agent, a unit which reconstructs first and second images, and a unit which generates a third image on the basis of the first and second images, the third image showing the degree of a change of the fluid after the administration from a state before the administration.

Description

[0001] (Cross-reference to related application)

[0002] This application is based on and claims priority from prior Japanese Patent Application No. 2009-091303 filed on April 3, 2009, the entire contents of which are hereby incorporated by reference. technical field

[0003] The present invention relates to a technique for acquiring information for medical diagnosis based on magnetic resonance signals radiated from a subject. Background technique

[0004] Perfusion imaging using intravascular contrast agents in dynamic susceptibility contrast-magnetic resonance imaging (DSC-MRI: dynamic susceptibility contrast magnetic resonance imaging) or dynamic contrast-enhanced MRI (DCE-MRI: dynamic contrast-enhanced magnetic resonance imaging), etc. ), since blood vessels become a diagnostic obstacle, it is desirable to exclude them from the analysis image. Blood vessels can be excluded by image processing such as threshold processing on an image in which blood vessels have already b...

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