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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