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Abstract #2932

Subtraction in View-Shared 3D Contrast-Enhanced MRA

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

1Radiology, Mayo Clinic, Rochester, MN, United States

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.