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Higher frame-rate phase-contrast with temporally under-sampled phase-reference acquisition: preliminary data in two vascular regions
Jerome Lamy1, Gigi Galiana2, and Dana Peters2
1Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, United States, 2Department of Radiology and Biomedical Imaging, Yale, New Haven, CT, United States
Here we introduce a simple method temporally under-sampling acquisition of the phase-reference images and evaluate it both in the aortic and pulmonary vein flow.
A) Aortic 2D PC-MRI images and the resultant velocities curves B. C, D and E show localization of the pulmonary vein, F) pulmonary vein 2D PC-MRI images G) and the resultant velocity curve. The four characteristic peaks are labeled.
Pulse sequence showing conventional through-plane velocity encoding (GSL), and the accelerated phase-reference method (GSL2) with 1.33-fold higher frame rate, and (GSL3), 1.5-fold higher frame rates, which is accomplished by acquiring the phase-reference data less often.