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The Feasibility of Non-contrast-enhanced Zero Echo Time Magnetic Resonance Angiography for Characterization of Intracranial Atherosclerotic Disease

Overview

Overview

Journal Quant Imaging Med Surg

Specialty Radiology

Date 2021 Jun 3

PMID 34079714

Citations 4

Authors

Authors

Chao Zhang

Weiqiang Dou

Ke Yu

Yun Ji

Wenliang Wang

Muhammad Umair Sami

Yong Shen

Kai Xu

Affiliations

Affiliations

Soon will be listed here.

Abstract

Background: Accurate and non-invasive assessment of intracranial atherosclerotic disease (ICAD) is important because of its effect on treatment planning. The aim of this study is to investigate if zero echo time (zTE) magnetic resonance angiography (zTE-MRA) is feasible in the characterization of ICAD.

Methods: A total of 175 patients with ICAD were recruited. ZTE-MRA and time-of-flight (TOF)-MRA sequences were conducted for all participants using a 3T clinical MR system. Forty-one patients also underwent digital subtraction angiography (DSA), and were confirmed to have intracranial arterial stenosis (ICAS). Weighted kappa (κ) statistics were used to assess the inter-observer agreement and diagnostic consistency of both zTE- and TOF-MRA, using DSA as a reference. The Wilcoxon signed-rank test was used to evaluate differences in image quality between zTE- and TOF-MRA images. The nonparametric test of multiple paired samples was used to compare the results of vascular stenosis diagnosis between zTE-, TOF-MRA and DSA.

Results: Supported by high inter-observer agreement (weighted κ=0.78), zTE-MRA generated significantly higher scores than TOF-MRA for susceptibility artifact signal (mean: 3.03±0.98 2.72±1.09; P=0.017) and flow signal in parent artery (mean: 3.63±0.49 3.07±0.82; P<0.001). Additionally, zTE-MRA showed more robust diagnostic performance than TOF-MRA for patients with ICAD and degree of vascular stenosis (P<0.05), and was highly consistent with reference DSA images (weighted κ=0.80).

Conclusions: ZTE-MRA has potential for use as a routine clinical method for patients with ICAD.

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