Impact of fat saturation in slice-selective inversion-prepared 3D SSFP renal MRA
Weidner J, Gunther R, Buecker A, Katoh M, Spuentrup E
RWTH Aachen University Hospital
The impact of additional fat saturation (SPIR,spectral presaturation inversion recovery) on vessel visualization was investigated in a slice-selective inversion-prepared 3D steady-state free-precession (SSFP) renal MR angiography (MRA) sequence. In 10 patients with suspected renovascular disease, a navigator-gated cardiac-triggered slice-selective inversion-prepared 3D SSFP sequence was performed with and without fat suppression. SNR, CNR and vessel sharpness were analyzed. Results were compared with contrast-enhanced MRA (CE-MRA) as the reference method. Using additional fat saturation, a significantly higher SNR and CNR can be achieved. Vessel sharpness was comparable for both sequences. Hence, fat saturation should be routinely used using this approach.