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Abstract #1765

Fast high Spatiotemporal-Resolution Spiral bSSFP Cardiac Cine with Disentanglement-based Reconstruction and Segmentation

Oliver Schad1, Julius Frederik Heidenreich1,2, Nils-Christian Petri3, Viktor Hartung1, Bettina Baeßler1, Bernhard Petritsch1,4, Thorsten Alexander Bley1, and Tobias Wech1,5
1Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany, 2Department of Radiology, University of Madison, Madison, WI, United States, 3Department of Internal Medicine 1, University Hospital Würzburg, Würzburg, Germany, 4Department of Diagnostic and Interventional Radiology, Klinikum Klagenfurt am Wörthersee, Klagenfurt am Wörthersee, Austria, 5Comprehensive Heart Failure Center, University Hospital Würzburg, Würzburg, Germany

Synopsis

Keywords: Heart Failure, Cardiovascular, High Temporal Resolution Cine

Motivation: MR-Imaging of rapid processes, such as the beating heart, typically relies on segmented acquisitions. Improving temporal resolution often requires extended acquisition windows, potentially increasing the burden on patients.

Goal(s): A highly-efficient spiral bSSFP acquisition scheme, combined with a deep learning-based reconstruction is employed to reduce acquisition times for high-temporal-resolution cine imaging.

Approach: Spiral acquisitions were performed on a subject with regular heartbeat, enabling creation of segmented, undersampled cine frames with temporal resolutions of 3.7$$$\,$$$ms, 7.4$$$\,$$$ms and 11.1$$$\,$$$ms. Additionally, real-time frames were acquired with a temporal resolution of 48.1$$$\,$$$ms.

Results: The proposed approach achieves improved accuracy in depicting cardiac motion compared to real-time imaging.

Impact: With undersampled spiral bSSFP acquisitions and a disentanglement-based reconstruction method high temporal resolution cardiac cine imaging can be acquired with up to 3.7$$$\,$$$ms/frame, potentially improving accuracy in left ventricular strain analysis and cardiac function assessment in subjects with regular heartbeat.

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Keywords