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

作者：Wagner Moritz^*; Knobloch Gesine; Gielen Martin; Lauff Marie Teres; Romano Valentina; Hamm Bernd; Kroencke Thomas

来源：International Journal of Cardiovascular Imaging, 2015, 31(4): 841-850.

DOI：10.1007/s10554-015-0612-3

• Quiescent-interval single-shot (QISS)
• Angiography
• MR angiography (MRA)
• Peripheral arterial disease (PAD)
• Nonenhanced MR angiography

Quiescent-interval single-shot MRA (QISS-MRA) is a promising nonenhanced imaging technique for assessment of peripheral arterial disease (PAD). Previous studies at 3 Tesla included only very limited numbers of patients for correlation of QISS-MRA with digital subtraction angiography (DSA) as standard of reference (SOR). The aim of this prospective institutional review board-approved study was to compare QISS-MRA at 3 Tesla with DSA in a larger patient group. Our study included 32 consecutive patients who underwent QISS-MRA, contrast-enhanced MRA (CE-MRA), and DSA. Two readers independently performed a per-segment evaluation of QISS-MRA and CE-MRA for image quality and identification of non-significant stenosis (< 50 %) versus significant stenosis (50-100 %). The final dataset included 1,027 vessel segments. Reader 1 and 2 rated image quality as diagnostic in 96.8 and 98.0 % of the vessel segments on QISS-MRA and in 99.3 and 98.4 % of the vessel segments on CE-MRA, respectively. DSA was available for 922 segments and detected significant stenosis in 133 segments (14.4 %). Consensus reading yielded the following diagnostic parameters for QISS-MRA versus CE-MRA: sensitivity: 83.5 % (111/133) versus 82.7 % (110/133), p = 0.80; specificity: 93.9 % (741/789) versus 95.7 % (755/789), p = 0.25; and diagnostic accuracy: 92.4 % (852/922) versus 93.8 % (865/922), p = 0.35. In conclusion, using DSA as SOR, QISS-MRA and CE-MRA at 3 Tesla showed similar diagnostic accuracy in the assessment of PAD. A limitation of QISS-MRA was the lower rate of assessable vessel segments compared to CE-MRA.

• 出版日期2015-4