Meeting Banner
Abstract #3897

Comparison of Subtractive and Non-Subtractive Nonenhanced MR Angiography for Peripheral Arterial Disease: a Pilot Study

MAGNA25Emily Ward1, NavYash Gupta, Eugene Dunkle1, Christopher Glielmi2, Robert R. Edelman1, 3

1Radiology, NorthShore University HealthSystem, Evanston, IL, United States; 2Siemens Healthcare; 3Radiology, Northwestern University, Chicago, IL, United States

Nonenhanced techniques can be a useful alternative to contrast-enhanced MRA for patients with peripheral arterial disease. Both subtractive and non-subtractive approaches have been proposed. The purpose of this pilot study was to determine the relative merits and accuracy of the two types of nonenhanced approaches. Our data showed good sensitivity and excellent inter-observer agreement for PAD using either subtractive or non-subtractive nonenhanced MRA. In this pilot study, specificity and image quality were significantly better for QISS than Native SPACE, due to substantially reduced sensitivity to motion artifacts and lack of dependence on selection of trigger delays.

Abstract PDF

Keywords

accuracy acknowledgment advantages agent agreement alternative angiography approaches approved arterial artery artifacts avoiding axial better blinded board calf cine contrast coronal degree delays dependence determine determined diastolic dimensions disease either enhanced evaluated evaluation examples excellent excluded experienced fast femoral fibrosis foundation function gated good graded grant heartbeat impaired incidence independent institutional intensity inter intervention joint kappa lack limbs male measured merits motion native northwestern observer often part partition patient patients percutaneous peripheral pilot pixel population potential presence prior projections proposed prosthesis pulse quality radiologists radiology reader readings reduced related renal require resolution resolved review risk scale scores segment segments selection sensitivity seventeen shot significantly slice source space specificity spin station statistic stepping studied substantially subtractive supported surgical suspected system systemic systolic table thick thin timing trigger twist types useful variability versus ward years