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Aortoiliac disease: Two‐dimensional inflow MR angiography with lipid suppression
Author(s) -
Mulligan Susan A.,
Doyle Mark,
Matsuda Tetsuya,
Koslin D. Bradley,
Kenney Philip J.,
Barton Robert E.,
Pohost Gerald M.
Publication year - 1993
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880030605
Subject(s) - angiography , medicine , radiology , magnetic resonance imaging , magnetic resonance angiography , maximum intensity projection , nuclear medicine
A magnetic resonance (MR) imaging strategy, SLIP (spatially separated lipid presaturation), which can be incorporated into existing MR imaging and MR angiographic techniques, has been developed to suppress lipid signal. The authors report the clinical application of this technique, with a triple comparison of two‐dimensional inflow MR angiography, with and without SLIP, and x‐ray angiography in patients with aortoiliac disease. SLIP improved visualization of arterial segments, with 50 of 63 (79%) arterial segments visualized versus 41 of 63 (65%) for non‐SLIP MR angiography. The SLIP strategy aids in the depiction of slow or turbulent flow, because the lipid signal is suppressed while the intravascular signal is left undisturbed. Image quality improves because of the combination of decreased background lipid signal intensity and use of the maximum‐intensity‐projection algorithm. Compared with x‐ray arteriography, non‐SLIP MR angiography had a sensitivity and specificity of 60% and 56%, respectively, for detection of lesions with 50%–100% diameter reduction, while SLIP MR angiography had a sensitivity and specificity, respectively, of 53% and 67%.