Subtraction in View-Shared 3D Contrast-Enhanced MRA

Eric Allen Borisch¹, Clifton R. Haider¹, Roger C. Grimm¹, Stephen J. Riederer¹

3D contrast-enhanced MR Angiography frequently uses a pre-contrast (tissue) acquisition as a subtraction reference (mask) to improve the output image quality and contrast-to-noise ratio. We discuss the appropriate application of this technique to the case of 3D time-resolved view-shared reconstructions, including at what stage in the reconstruction process the subtraction is performed and the selection of effective mask data to suppress magnetization history effects.