Volume 56, Issue 3 pp. 944-955
Research Article

Multi-Planar, Multi-Contrast and Multi-Time Point Analysis Tool (MOCHA) for Intracranial Vessel Wall Characterization

Yin Guo MS

Yin Guo MS

Department of Bioengineering, University of Washington, Seattle, Washington, 98109 USA

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Gador Canton PhD

Gador Canton PhD

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

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Li Chen PhD

Li Chen PhD

Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington, 98109 USA

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Jie Sun MD

Jie Sun MD

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

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Duygu Baylam Geleri MD

Duygu Baylam Geleri MD

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

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Niranjan Balu PhD

Niranjan Balu PhD

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

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Dongxiang Xu PhD

Dongxiang Xu PhD

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

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Mahmud Mossa-Basha MD

Mahmud Mossa-Basha MD

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

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Thomas S. Hatsukami MD

Thomas S. Hatsukami MD

Department of Surgery, University of Washington, Seattle, Washington, 98109 USA

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Chun Yuan PhD

Corresponding Author

Chun Yuan PhD

Department of Bioengineering, University of Washington, Seattle, Washington, 98109 USA

Department of Radiology, University of Washington, Seattle, Washington, 98109 USA

Address reprint requests to: C.Y., 850 Republican Street, Suite D124, Seattle, Washington, USA. E-mail: [email protected]

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First published: 31 January 2022
Citations: 9

Abstract

Background

Three-dimensional (3D) intracranial vessel wall (IVW) magnetic resonance imaging can reliably image intracranial atherosclerotic disease (ICAD). However, an integrated, streamlined, and optimized workflow for IVW analysis to provide qualitative and quantitative measurements is lacking.

Purpose

To propose and evaluate an image analysis pipeline (MOCHA) that can register multicontrast and multitime point 3D IVW for multiplanar review and quantitative plaque characterization.

Study type

Retrospective.

Population

A total of 11 subjects with ICAD (68 ± 10 years old, 6 males).

Field Strength/Sequence

A 3.0 T, 3D time-of-flight gradient echo sequence and T1- and proton density-weighted fast spin echo sequences.

Assessment

Each participant underwent two IVW sessions within 2 weeks. Scan and rescan IVW images were preprocessed using MOCHA. The presence of atherosclerotic lesions was identified in different intracranial arterial segments by two readers (GC and JS, 12 years of vascular MR imaging experience each) following an established review protocol to reach consensus on each of the reviews. For all locations with identified plaques, plaque length, lumen and vessel wall areas, maximum and mean wall thickness values, normalized wall index and contrast enhancement ratio were measured.

Statistical Tests

Percent agreement and Cohen's κ were used to test scan–rescan reproducibility of detecting plaques using MOCHA. Intraclass correlation coefficient (ICC) and Bland–Altman analysis were used to evaluate scan–rescan reproducibility for plaque morphologic and enhancement measurements.

Results

In 150 paired intracranial vessel segments, the overall agreement in plaque detection was 92.7% (κ = 0.822). The ICCs (all ICCs > 0.90) and Bland–Altman plots (no bias observed) indicated excellent scan–rescan reproducibility for all morphologic and enhancement measurements.

Data Conclusion

Findings from this study demonstrate that MOCHA provides high scan–rescan reproducibility for identification and quantification of atherosclerosis along multiple intracranial arterial segments and highlight its potential use in characterizing plaque composition and monitoring plaque development.

Evidence Level

4

Technical Efficacy

Stage 2

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