Patent ID: 9123121
Filing Date: 2015-09-01
Classification: A61B,G01R

Abstract:
1. A magnetic resonance imaging apparatus that acquires an image of a fluid by dividing k space into a plurality of segments, applying a two-dimensional selective excitation pulse as a pre-pulse, and measuring echo signals of one or more segments each time the two-dimensional selective excitation pulse is applied, the apparatus comprising: an imaging parameter determination unit that determines the number of segment execution times, which is the number of segments, amongst the plurality of segments of k space, measured each time the two-dimensional selective excitation pulse is applied, from a velocity of a fluid to be imaged, a size of an excitation region of the input two-dimensional selective excitation pulse, and measurement time per segment, wherein the imaging parameter determination unit includes a velocity determination section that determines a velocity of the fluid to be imaged and a number-of-segment-execution-times calculation section that calculates the number of segment execution times, and the velocity determination section includes a flow velocity image acquisition section that acquires a flow velocity image of the fluid to be imaged and a flow velocity determination section that determines a flow velocity of the fluid to be imaged from the flow velocity image, wherein the imaging parameter determination unit further includes a k-space ordering determination section that determines an echo signal acquired in each segment such that an echo signal with a greater effect of the two-dimensional selective excitation pulse is arranged in a region closer to the center of k space, and wherein the k-space ordering determination section determines a segment, in which an echo signal with a greatest effect of the two-dimensional selective excitation pulse is acquired, from the velocity of the fluid to be imaged and the measurement time per segment and arranges the echo signal near the center of k space.