Contrast-Enhanced Magnetic Resonance Angiography MoBI-trak in the
Study of Peripheral Vascular Disease |
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Authors: | Alessandro Carriero Alberto Maggialetti Dario Pinto Matteo Salcuni Mariam Mansour Sergio Petronelli Lorenzo Bonomo |
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Institution: | (1) Department of Radiology, University of Chieti, Chieti, Italy, IT |
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Abstract: | Purpose: To evaluate the diagnostic
accuracy of contrast-enhanced magnetic resonance angiography (CE-MRA)
MoBI-trak of peripheral vessels in patients with peripheral vascular
disease who were candidates for digital subtraction angiography
(DSA).
Methods: Eleven patients underwent CE-MRA with
automated table movement (MoBI-trak) using a 1.5 T superconducting
magnet (Philips Gyroscan ACS NT) equipped with a Power Trak 6000
gradient. Contrast medium (Gd-DTPA) was administered in two sequential
boluses-20 cm3 at 0.6 cm3/sec (starting phase)
and 20 cm3 at 0.3 cm3/sec (maintenance
phase)-using a MedRad Spectris automatic injector. DSA was the gold
standard and was performed using a Philips Integris 3000, with a
brilliance intensifier of 38 seconds. DSA and MRA were evaluated on
printed films.
Results: DSA provided 213 diagnostic
assessments: 144 negative, 30 stenosis <50%, 5 stenoses in the
51-70% range, 12 stenoses in the 71-99% range and 22 occlusions.
CE-MRA MoBI-trak sensitivity, specificity, positive and negative
predictive value and diagnostic accuracy were 94.1%, 99.2%, 98.4%,
80.0% and 97.5%, respectively.
Conclusions: Our work
is in accordance with the literature. Using this technique MoBI-trak
has been shown to be a reliable technique for the detection of
peripheral vascular disease up to the trifurcation, although it
underlines the necessity for more diagnostic investigation and
improvements in the technique. |
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Keywords: | |
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