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Abstract #2967

Volumetric dynamic MR-defecography

Valentin Ratz1, Tobias Wech1, Andreas Schindele2, Alexander Sauer1, Alexander Dierks1, Joachim Reibetanz3, Alfio Borzi2, Thorsten Bley1, and Herbert Köstler1

1Institute of Diagnostic and Interventional Radiology, Unisversity Hospital Würzburg, Würzburg, Germany, 2Institute of Mathematics, University Würzburg, Würzburg, Germany, 3Department of General-, Visceral-, Vascular- and Pediatric Surgery, Unisversity Hospital Würzburg, Würzburg, Germany

Current 2D MR-defecography techniques lack information about lateral localized pathologies. The purpose of this project was to implement a dynamic 3D MR-defecography which covers a larger area and thereby gathers more detailed information on the anatomy during defecation. Therefore we implemented a radial 3D TrueFISP Stack of Stars sequence with density-weighting and view-sharing. The highly undersampled datasets, which we have acquired in 5 patients, were reconstructed using a modified FISTA compressed sensing algorithm. The proposed method allows for a dynamic 3D examination of the fast defecation process. Therefore the detection of lateral localized pathologies is possible as well.

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