Abstract #4978

Dynamic Contrast-Enhanced Imaging of the Rectum Using Golden-Angle Radial Sparse Parallel MRI (GRASP): Initial Experience and Comparison to a Conventional Approach Using Time-resolved Angiography With Interleaved Stochastic Trajectories (TWIST).

Daniel Hausmann¹, Jing Liu², Philipp Riffel¹, Johannes Budjan¹, Robert Grimm ³, Tobias Block⁴, Stefan O Schoenberg¹, and Ulrike I Attenberger¹

¹Institute of Clinical Radiology and Nuclear Medicine, University Medicine Mannheim, Mannheim, Germany, ²Department of Radiology, Peking Universtiy First Hospital, Beijing, China, ³Siemens Healthcare, Erlangen, Germany, ⁴Department of Radiology, New York University, New York City, NY, USA

MR perfusion images to discriminate between normal rectal wall and rectal cancers with less variance of perfusion values and superior image quality compared to conventional TWIST-Angiography can be generated using time-resolved free-breathing MRI with continuous golden-angle radial sampling and iterative reconstruction (GRASP). Additional morphologic assessment (“one-stop-shop”) with high spatial resolution, artifact-insensitive, multiphase, contrast-enhanced imaging may increase accuracy and diagnostic confidence of the examination.

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