Dual arterial Phase acquisition Based on united Compressed Sensing Technology of MRI Provides Good Hepatic arteries display and optimal Late arterial Phase

Abstract Purpose: To evaluate the application of equivalent voxel dual arterial phase (AP) sequence in dynamic contrast-enhanced magnetic resonance imaging (MRI) for the liver arteries display and optimal capture of late AP. Material and Methods: A total of 190 patients enrolled in our study were randomly divided into two cohorts. The equivalent voxel dual AP acquisition based on the unified compressed sensing (uCS) technique was performed in a cohort of 94 patients, and the single AP based on T1-weighted gradient echo acquisition was performed in 96 patients. The successful capturing rates of late AP and evaluations of the display of hepatic arteries were compared between the dual AP and single AP cohorts. Results: The image quality of liver arteries in the dual AP cohort was mostly higher than that in the conventional single AP cohort. In the first arterial sequence of dual AP imaging, early AP was observed in 76 (80.9%) patients, and late AP was observed in 18 (19.1%) patients. In the second arterial sequence of dual AP, the late AP was observed in 97.9% (92/94) of the patients, and the portal venous phase was observed in 2.1% (2/94). The capture rate of optimal late AP in dual AP was 100%, which was significantly higher than that of single AP (84.3%, P<0.001). Conclusion : The dual AP acquisition based on uCS can provide a high image quality of hepatic arteries and optimal late AP.