Patent ID: 8958866
Filing Date: 2015-02-17
Classification: A61B,G01R

Abstract:
1. A method of producing an image of a subject using an MRI system, the method comprising the steps of: a) directing the MRI system to perform a first pulse sequence that includes the following sequential steps: b) acquiring a tag set of NMR data from the subject after step a) and at a tag acquisition time after step a1); c) directing the MRI system to perform a second pulse sequence that includes the following sequential steps: d) acquiring a control set of NMR data from the subject after step c) and at a control acquisition time after step c1) that is equal to the tag acquisition time; e) reconstructing a tag image from the tag set of NMR data and a control image from the control set of NMR data; and f) subtracting the tag image from the control image to produce the image of the subject, wherein the third cutoff velocity and the fourth cutoff velocity are different velocities, and wherein the image of the subject indicates a characteristic of the blood flowing within the selected vascular compartments and is substantially free of information from both stationary tissue and blood outside the selected vascular compartments.