Evaluating peripheral arterial disease with unenhanced quiescent-interval single-shot MR angiography at 3 T

Parag Amin*, Jeremy D. Collins, Ioannis Koktzoglou, Christopher Molvar, Michael Markl, Robert R. Edelman, James C. Carr

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

OBJECTIVE. The objective of our study was to assess the diagnostic performance of quiescent-interval single-shot (QISS) MR angiography (MRA) at 3 T for the evaluation of chronic lower limb ischemia. SUBJECTS AND METHODS. For this prospective study, 25 patients referred for lower extremity angiography for suspected or known chronic peripheral arterial disease were imaged on a 3-T system using QISS MRA. Contrast-enhanced MRA of the lower extremities was acquired at 3 T for each patient at the time of the initial visit and served as the noninvasive reference standard. Two blinded reviewers separately graded the degree of arterial stenosis. The sensitivity and specificity of QISS MRA for the determination of significant (≥ 50%) stenosis were calculated against contrast-enhanced MRA. Subsequent selective digital subtraction angiography (DSA) was performed and reviewed in nine patients. RESULTS. QISS MRA exhibited diagnostic performance nearly equivalent to that of contrast-enhanced MRA and also showed strong correlation with findings on DSA. Segment-based analysis revealed that, for the two reviewers, QISS MRA had sensitivities of 95.9% (142 of 148 segments) and 93.5% (145 of 155 segments) and specificities of 98.5% (595 of 604 segments) and 97.0% (578 of 596 segments) on comparison with contrast-enhanced MRA. CONCLUSION. QISS MRA maintains high diagnostic performance at 3 T despite the challenges inherent to image acquisition at higher field strengths.

Original languageEnglish (US)
Pages (from-to)886-893
Number of pages8
JournalAmerican Journal of Roentgenology
Volume202
Issue number4
DOIs
StatePublished - Apr 2014

Keywords

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

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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