Accelerated High-Resolution 3D Isotropic Wrist MRI at 7 Tesla: Compressed Sensing vs. SENSE
Bobby Runderkamp1, Matthan Caan2, Wietske van der Zwaag3, Robert Hemke1, Mario Maas1, Mads Andersen4,5, Gustav Strijkers2, Karin Markenroth Bloch4, and Aart Nederveen1
1Radiology & Nuclear Medicine, Amsterdam UMC, Amsterdam, Netherlands, 2Biomedical Engineering and Physics, Amsterdam UMC, Amsterdam, Netherlands, 3Spinoza Center for Neuroimaging, Amsterdam, Netherlands, 4Lund University Bioimaging Center, Lund, Sweden, 5Philips Healthcare, Copenhagen, Denmark
Imaging of the intricate arrangement of small structures in the wrist benefits from high resolution imaging, which the increased SNR at 7 Tesla can enable. However, the increased resolution requires longer scan times, decreasing patient comfort and increasing risk of motion artifacts. In this work, we evaluated compressed sensing (CS) acceleration of a clinical wrist 7T MRI protocol, 0.45mm isotropic resolution, in comparison to SENSE-acceleration. We show that CS-acceleration can produce adequate to good image quality in significantly shorter scan times, not achievable by increasing SENSE-acceleration.
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