Contrast Detection and Timing for MR Angiography with Self-Navigated DC Signal Detection
Reeder S, Brodsky E, Brau A, Block W, Brittain J
University of Wisconsin, University of Wisconsin
In this work, we describe a self-navigated method for the detection of contrast uptake for rapid MR angiographic applications. Using a 3D projection reconstruction angiographic imaging method (VIPR), samples from the center of k-space are collected just prior to the readout gradient in order to measure the DC component of image spatial frequencies. Acquiring this information every TR provides a rapid method for tracking the bolus of contrast as it enters the patient. This method can be generalized to Cartesian image acquisitions and shows promise for improving the timing and detection of contrast boluses.