Volume 49, Issue 3 pp. 668-677
Original Research

Histogram Analysis of Native T1 Mapping and Its Relationship to Left Ventricular Late Gadolinium Enhancement, Hypertrophy, and Segmental Myocardial Mechanics in Patients With Hypertrophic Cardiomyopathy

Chong-Wen Wu MD

Chong-Wen Wu MD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

The first two authors contributed equally to this work.

Search for more papers by this author
Rui Wu MD

Rui Wu MD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

The first two authors contributed equally to this work.

Search for more papers by this author
Ruo-Yang Shi MD

Ruo-Yang Shi MD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

Search for more papers by this author
Dong-Aolei An MD

Dong-Aolei An MD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

Search for more papers by this author
Bing-Hua Chen MD

Bing-Hua Chen MD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

Search for more papers by this author
Meng Jiang MD, PhD

Meng Jiang MD, PhD

Department of Cardiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

Search for more papers by this author
Andrew Bacyinski DPT

Andrew Bacyinski DPT

Department of Radiology, Wayne State University School of Medicine, Detroit, Michigan, USA

Search for more papers by this author
Ali Rahim MS

Ali Rahim MS

Department of Radiology, Wayne State University School of Medicine, Detroit, Michigan, USA

Search for more papers by this author
James M. Deen MS

James M. Deen MS

Department of Radiology, Wayne State University School of Medicine, Detroit, Michigan, USA

Search for more papers by this author
Jiani Hu PhD

Jiani Hu PhD

Department of Radiology, Wayne State University School of Medicine, Detroit, Michigan, USA

Search for more papers by this author
Tong-Tong Han MS

Tong-Tong Han MS

Circle Cardiovascular Imaging, Calgary, Alberta, Canada

Search for more papers by this author
Jian-Rong Xu MD, PhD

Corresponding Author

Jian-Rong Xu MD, PhD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

Address reprint requests to: L.-M.W. or J.-R.X., Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 PuJian Road, Shanghai 200127, P.R. China. E-mail: [email protected] or [email protected]Search for more papers by this author
Lian-Ming Wu MD, PhD

Corresponding Author

Lian-Ming Wu MD, PhD

Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China

Address reprint requests to: L.-M.W. or J.-R.X., Department of Radiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, No. 160 PuJian Road, Shanghai 200127, P.R. China. E-mail: [email protected] or [email protected]Search for more papers by this author
First published: 24 August 2018
Citations: 7

Abstract

Background

The use of native T1 mapping for evaluation of hypertrophic cardiomyopathy (HCM) is being explored, and its combination with histogram analysis may benefit the accuracy of such assessments.

Purpose

To investigate the relationship of segmental left ventricular wall thickness (LVWT), myocardial fibrosis, and strain parameters with segmental histogram parameters of native T1 mapping in HCM patients.

Study Type

Retrospective.

Subjects

Ninety-three HCM patients without previous cardiovascular diseases were included.

Field Strength/Sequence

3.0T cardiac MR. Steady-state free precession cine imaging, modified Look–Locker inversion recovery, phase-sensitive inversion recovery.

Assessment

Images were assessed by three experienced radiologists.

Statistical Tests

Mann–Whitney U-tests, area under the curve (AUC), Spearman's rank correlation, intraclass correlation coefficient, and Bland–Altman test were used for statistical analysis.

Results

A higher LVWT value correlated with higher means, minimums, 10th/25th/50th/75th/90th percentiles, maximums, kurtosis, entropy, and lower SD and energy of T1 mapping (P < 0.05 for all), with the correlation being stronger for entropy and energy (Spearman's rho = 0.439 and –0.413, respectively) than other parameters. Late gadolinium enhancement positive (LGE+) segments exhibited higher mean, minimum, 10th/25th/50th/75th/90th percentiles, maximum, entropy, and lower energy of T1 times than late gadolinium enhancement negative (LGE–) segments (P < 0.001 for all). Impaired strain function parameters (peak thickening and thickening rate in radial, circumferential, and longitudinal directions) demonstrated a weak correlation with higher entropy (P < 0.001 for all) and lower energy (P < 0.001 for all).

Data Conclusion

Histogram parameters of native T1 mapping provide more information than mean T1 times alone. Among these parameters, entropy and energy may correlate better with LVWT, myocardial late gadolinium enhancement, and strain parameters than mean T1 times in HCM patients.

Level of Evidence: 2

Technical Efficacy Stage: 2

J. Magn. Reson. Imaging 2019;49:668–677.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.