CC BY-NC-ND 4.0 · Journal of Clinical Interventional Radiology ISVIR
DOI: 10.1055/s-0041-1730845
Original Article

Balanced Steady-State Free Precision and Time of Flight Noncontrast Magnetic Resonance Angiography in Peripheral Arterial Disease

Soumya Susan Regi
1  Division of Clinical Radiology, Department of Diagnostic Radiology, Christian Medical College, Vellore, Tamil Nadu, India
,
Aparna Irodi
1  Division of Clinical Radiology, Department of Diagnostic Radiology, Christian Medical College, Vellore, Tamil Nadu, India
,
Shyamkumar N. Keshava
2  Division of Clinical Radiology, Department of Interventional Radiology, Christian Medical College, Vellore, Tamil Nadu, India
,
Sunil Agarwal
3  Department of Vascular Surgery, Christian Medical College, Vellore, Tamil Nadu, India
› Author Affiliations
Funding Nil. pvalue > 0.05 in the aorta, the common femoral, superficial femoral and popliteal arteries, implying that the mean of the scores of the quality in these segments in the NC-MRA and CE-MRA/CTA were statistically not different from each other. pvalue of 0.05 taken as statistically significant. Low p values in the infrapopliteal arteries indicate statistically significant better image quality score on CE-MRA as compared with NC-MRA.

Abstract

Purpose To determine the diagnostic efficacy of balanced steady-state free precession (bSSFP) and time-of-flight (TOF)-based noncontrast magnetic resonance angiography (NC-MRA) in lower limb peripheral arterial disease (PAD).

Material and Methods 10 patients with suspected PAD underwent both NC-MRA (bSSFP and 2D TOF) and contrast-enhanced MR angiography (CE-MRA)/CT angiography (CTA). A total of 170 arterial segments (17 segments in each patient) were analyzed on NC-MRA and compared with CE-MRA/CTA for quality of images and for estimating the degree of stenoses. Image quality was graded as 1—poor, 2—fair, 3—good, and 4—excellent. The degree of stenoses was graded as 0—normal, 1— ≤ 50% narrowing, 2— > 50% narrowing, 3—near complete/100% occlusion. Sensitivity, specificity, positive predictive value, and negative predictive value of NC-MRA in identifying significant stenosis, as compared with CE-MRA/CTA, were estimated.

Results a) Mean grade of the image quality of NC-MRA was 3.10 and the CE-MRA/CTA was 3.64. b) The agreement in the estimation of the degree of stenosis on NC-MRA as compared with CE-MRA/CTA was substantial in aortoiliac segments (weighted kappa 0.646 [95% CI] [0.361–0.931] [p < 0.001]), almost perfect in femoropopliteal segments (weighted kappa 0.911 [95% CI] [0.79–1.032] [p < 0.001]), and poor in infrapopliteal segments (weighted kappa 0.052 [95% CI] [0.189–0.293] [p < 0.33587]).

Conclusion TOF and bSSFP-based NC-MRA was found to be comparable to the CE-MRA/CTA in the evaluation of PAD in lower limbs in the aortoiliac and femoropopliteal regions. NC-MRA was especially helpful in assessing the aortoiliac vessels and femoropopliteal vessels, with the imaging of infrapopliteal arteries being suboptimal.



Publication History

Publication Date:
06 July 2021 (online)

© 2021. Indian Society of Vascular and Interventional Radiology. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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