Volume 57, Issue 5 pp. 1376-1389
Research Article

Reliability and Value of 3D Sequential QUantitative T1-T2-T2* MAppings (SQUMA) MR Multi-Parametric Imaging in Characterizing Carotid Artery Atherosclerosis

Huiyu Qiao PhD

Huiyu Qiao PhD

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

School of Medicine, Tsinghua University-Peking University Joint Center for Life Sciences, Beijing, China

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Qiansu Yang BS

Qiansu Yang BS

Center of Medicine Clinical Research, Department of Pharmacy, Medical Supplies Center of PLA General Hospital, Beijing, China

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Ran Huo PhD

Ran Huo PhD

Department of Radiology, Peking University Third Hospital, Beijing, China

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Hualu Han PhD

Hualu Han PhD

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

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Zihan Ning BS

Zihan Ning BS

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

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Rui Shen MS

Rui Shen MS

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

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Xiaowei Song MD, PhD

Xiaowei Song MD, PhD

Department of Neurology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China

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Huijun Chen PhD

Huijun Chen PhD

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

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Shuo Chen PhD

Corresponding Author

Shuo Chen PhD

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

Address reprint requests to: S.C. or X.Z., Haidian District, 100084 Beijing, China. E-mail: [email protected] or [email protected]

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Xihai Zhao MD, PhD

Corresponding Author

Xihai Zhao MD, PhD

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University School of Medicine, Beijing, China

Address reprint requests to: S.C. or X.Z., Haidian District, 100084 Beijing, China. E-mail: [email protected] or [email protected]

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First published: 29 September 2022

Shuo Chen and Xihai Zhao contributed equally to this study.

Abstract

Background

T1, T2, and T2* mappings are seldom performed in a single examination, and their values in evaluating symptomatic atherosclerosis are lacking.

Purpose

To perform three-dimensional (3D) quantitative T1, T2, and T2* mappings (SQUMA) multi-parametric imaging for carotid vessel wall and evaluate its reliability and value in assessing carotid atherosclerosis.

Study Type

Prospective.

Subjects

Eight healthy subjects and 20 patients with symptomatic carotid atherosclerosis.

Field Strength/Sequence

3 T, SQUMA imaging T1-, T2-, and T2*-mapping, multi-contrast vessel wall imaging including T1- and T2-weighted, time-of-flight, and SNAP sequences.

Assessment

SQUMA was acquired in all subjects and multi-contrast images were acquired in healthy subjects. T1, T2, and T2* values and lumen area (LA), wall area (WA), mean wall thickness (MeanWT), and normalized wall index (NWI) of carotid arteries were measured. SQUMA and multi-contrast measurements were compared in healthy subjects and differences in SQUMA measurements between healthy subjects and patients were assessed. The discriminative value of SQUMA measurements for symptomatic vessel was determined.

Statistical Tests

Paired t or Wilcoxon signed-rank test, independent t or Mann–Whitney U test, area under the receiver operating characteristic curve (AUC), intraclass correlation coefficients, and Bland–Altman plots. Statistically significant level, P < 0.05.

Results

There were no significant differences in LA (P = 0.340), WA (P = 0.317), MeanWT (P = 0.088), and NWI (P = 0.091) of carotid arteries between SQUMA and multi-contrast vessel wall images. The values of T2 (50.9 ± 2.9 msec vs. 44.5 ± 4.2 msec), T2* (28.2 ± 4.3 msec vs. 24.7 ± 2.6 msec), WA (23.7 ± 4.6 mm2 vs. 36.2 ± 7.7 mm2), MeanWT (0.99 ± 0.05 mm vs. 1.50 ± 0.28 mm), and NWI (40.7 ± 3.0% vs. 53.8 ± 5.4%) of carotid arteries in healthy subjects were significantly different from those in atherosclerotic patients. The combination of quantitative T1, T2, and T2* values and MeanWT showed greatest AUC (0.81; 95% CI: 0.65–0.92) in discriminating symptomatic vessels.

Data Conclusion

Carotid MR 3D quantitative multi-parametric imaging of SQUMA enables acquisition of T1, T2, and T2* maps, reliably measuring carotid morphology and discriminating carotid symptomatic atherosclerosis.

Level of Evidence

2

Technical Efficacy

Stage 2

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