ECG-Triggered Non-Contrast-Enhanced MR Angiography (TRANCE) versus Digital Subtraction Angiography (DSA) in patients with peripheral arterial occlusive disease of the lower extremities

Abstract

TRANCE achieves high diagnostic accuracy in the thigh and calf regions, whereas the pedal arteries showed limited quality.

Nonenhanced Magnetic Resonance Angiography of the Lower Extremity Vessels at 7 Tesla

“…5 Another trial observed an excellent overall image quality for ECG-triggered nonYcontrast-enhanced MRA (TRANCE) in 91.4% versus 95.7% DSA for the thigh and in 60.7% versus 91.0% for the calves, although the diagnostic quality of the pedal arteries was rated as insufficient. 7 Imaging of a whole angiogram amounted to 67.5 minutes, on average, in this study. 7 Compared with these nonYcontrast-enhanced MRA studies at lower field strength, our study at 7 T exhibited comparable results regarding image quality in the evaluation of healthy volunteers.…”

“…7 Imaging of a whole angiogram amounted to 67.5 minutes, on average, in this study. 7 Compared with these nonYcontrast-enhanced MRA studies at lower field strength, our study at 7 T exhibited comparable results regarding image quality in the evaluation of healthy volunteers. However, our initial study does not reflect the entire potential of 7-T imaging regarding the gain in spatial and temporal resolution yet.…”

Nonenhanced peripheral MR-angiography (MRA) at 3 Tesla: evaluation of quiescent-interval single-shot MRA in patients undergoing digital subtraction angiography

“…Image quality of QISS-MRA was non-diagnostic in 2-3 % of the vessel segments. Non-diagnostic Vessel segments: Aorta (1), AIC right and left common iliac artery (2, 3), AIE right and left external iliac artery (4,5), AFC right and left common femoral artery (6, 7), AFP right and left deep femoral artery (8,9), AFS right and left proximal and distal superficial femoral artery (10)(11)(12)(13), AP right and left proximal, middle, and distal popliteal artery (14)(15)(16)(17)(18)(19), ATA right and left proximal and distal anterior tibial artery (20)(21)(22)(23), TFT right and left tibiofibular trunk (24,25), PTA right and left proximal and distal posterior tibial artery (26)(27)(28)(29), and AF right and left proximal and distal fibular artery (30)(31)(32)(33) image quality was attributed to off-resonance artifacts. Off-resonance refers to a deviation of the local spins' resonant frequency in relation to the nominated scanner center frequency and is caused by main field inhomogeneities or magnetic susceptibilities [21].…”

“…Another promising nonenhanced MRA technique for assessment of PAD is subtraction MRA. Recent studies demonstrated that nonenhanced subtraction MRA allows assessment of PAD with high image quality [23,24]. However, several studies also revealed the drawbacks of nonenhanced subtraction MRA.…”

“…The arterial vascular tree was divided into 32 segments for analysis of image quality and diagnostic performance: abdominal aorta (1), pelvic vessel segments including right and left common iliac artery (2, 3), right and left external iliac artery (4,5), and right and left common femoral artery (6,7), thigh vessel segments including right and left deep femoral artery (8,9), right and left proximal and distal superficial femoral artery (10-13), right and left proximal, middle, and distal popliteal artery (14)(15)(16)(17)(18)(19), and calf vessel segments including right and left proximal and distal anterior tibial artery (20)(21)(22)(23), right and left tibiofibular trunk (24,25), right and left proximal and distal posterior tibial artery (26)(27)(28)(29), and right and left proximal and distal fibular artery (30-33). Two blinded readers (M.W.…”