Dongyue Si, Rui Guo, Lan Cheng, Xiangchuang Kong, Daniel A Herzka, Haiyan Ding
{"title":"基于多参数饱和恢复和可变翻转角度（mSAVA）的自由呼吸三维同步心肌 T1 和 T2 图谱。","authors":"Dongyue Si, Rui Guo, Lan Cheng, Xiangchuang Kong, Daniel A Herzka, Haiyan Ding","doi":"10.1016/j.jocmr.2024.101065","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Quantitative myocardial tissue characterization with T<sub>1</sub> and T<sub>2</sub> parametric mapping can provide an accurate and complete assessment of tissue abnormalities across a broad range of cardiomyopathies. However, current clinical T<sub>1</sub> and T<sub>2</sub> mapping tools rely predominantly on two-dimensional (2D) breath-hold sequences. Clinical adoption of three-dimensional (3D) techniques is limited by long scan duration. The aim of this study is to develop and validate a time-efficient 3D free-breathing simultaneous T<sub>1</sub> and T<sub>2</sub> mapping sequence using multi-parametric SAturation-recovery and Variable-flip-Angle (mSAVA).</p><p><strong>Methods: </strong>mSAVA acquires four volumes for simultaneous whole-heart T<sub>1</sub> and T<sub>2</sub> mapping. We validated mSAVA using simulations, phantoms, and in-vivo experiments at 3T in 11 healthy subjects and 11 patients with diverse cardiomyopathies. T<sub>1</sub> and T<sub>2</sub> values by mSAVA were compared with modified Look-Locker inversion recovery (MOLLI) and gradient and spin echo (GraSE), respectively. The clinical performance of mSAVA was evaluated against late gadolinium enhancement (LGE) imaging in patients.</p><p><strong>Results: </strong>Phantom T<sub>1</sub> and T<sub>2</sub> by mSAVA showed a strong correlation to reference sequences (R<sup>2</sup> = 0.98 and 0.99). In-vivo imaging with an imaging resolution of 1.5 × 1.5 × 8 mm<sup>3</sup> could be achieved. Myocardial T<sub>1</sub> and T<sub>2</sub> of healthy subjects by mSAVA were 1310 ± 46 and 44.6 ± 2.0 ms, respectively, with T<sub>1</sub> standard deviation higher than MOLLI (105 ± 12 vs 60 ± 16 ms) and T<sub>2</sub> standard deviation lower than GraSE (4.5 ± 0.8 vs 5.5 ± 1.0 ms). mSAVA T<sub>1</sub> and T<sub>2</sub> maps presented consistent findings in patients undergoing LGE. Myocardial T<sub>1</sub> and T<sub>2</sub> of all patients by mSAVA were 1421 ± 79 and 47.2 ± 3.3 ms, respectively.</p><p><strong>Conclusion: </strong>mSAVA is a fast 3D technique promising for clinical whole-heart T<sub>1</sub> and T<sub>2</sub> mapping.</p>","PeriodicalId":15221,"journal":{"name":"Journal of Cardiovascular Magnetic Resonance","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11347066/pdf/","citationCount":"0","resultStr":"{\"title\":\"Free-breathing three-dimensional simultaneous myocardial T<sub>1</sub> and T<sub>2</sub> mapping based on multi-parametric SAturation-recovery and Variable-flip-Angle.\",\"authors\":\"Dongyue Si, Rui Guo, Lan Cheng, Xiangchuang Kong, Daniel A Herzka, Haiyan Ding\",\"doi\":\"10.1016/j.jocmr.2024.101065\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>Quantitative myocardial tissue characterization with T<sub>1</sub> and T<sub>2</sub> parametric mapping can provide an accurate and complete assessment of tissue abnormalities across a broad range of cardiomyopathies. However, current clinical T<sub>1</sub> and T<sub>2</sub> mapping tools rely predominantly on two-dimensional (2D) breath-hold sequences. Clinical adoption of three-dimensional (3D) techniques is limited by long scan duration. The aim of this study is to develop and validate a time-efficient 3D free-breathing simultaneous T<sub>1</sub> and T<sub>2</sub> mapping sequence using multi-parametric SAturation-recovery and Variable-flip-Angle (mSAVA).</p><p><strong>Methods: </strong>mSAVA acquires four volumes for simultaneous whole-heart T<sub>1</sub> and T<sub>2</sub> mapping. We validated mSAVA using simulations, phantoms, and in-vivo experiments at 3T in 11 healthy subjects and 11 patients with diverse cardiomyopathies. T<sub>1</sub> and T<sub>2</sub> values by mSAVA were compared with modified Look-Locker inversion recovery (MOLLI) and gradient and spin echo (GraSE), respectively. The clinical performance of mSAVA was evaluated against late gadolinium enhancement (LGE) imaging in patients.</p><p><strong>Results: </strong>Phantom T<sub>1</sub> and T<sub>2</sub> by mSAVA showed a strong correlation to reference sequences (R<sup>2</sup> = 0.98 and 0.99). In-vivo imaging with an imaging resolution of 1.5 × 1.5 × 8 mm<sup>3</sup> could be achieved. Myocardial T<sub>1</sub> and T<sub>2</sub> of healthy subjects by mSAVA were 1310 ± 46 and 44.6 ± 2.0 ms, respectively, with T<sub>1</sub> standard deviation higher than MOLLI (105 ± 12 vs 60 ± 16 ms) and T<sub>2</sub> standard deviation lower than GraSE (4.5 ± 0.8 vs 5.5 ± 1.0 ms). mSAVA T<sub>1</sub> and T<sub>2</sub> maps presented consistent findings in patients undergoing LGE. 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Free-breathing three-dimensional simultaneous myocardial T1 and T2 mapping based on multi-parametric SAturation-recovery and Variable-flip-Angle.
Background: Quantitative myocardial tissue characterization with T1 and T2 parametric mapping can provide an accurate and complete assessment of tissue abnormalities across a broad range of cardiomyopathies. However, current clinical T1 and T2 mapping tools rely predominantly on two-dimensional (2D) breath-hold sequences. Clinical adoption of three-dimensional (3D) techniques is limited by long scan duration. The aim of this study is to develop and validate a time-efficient 3D free-breathing simultaneous T1 and T2 mapping sequence using multi-parametric SAturation-recovery and Variable-flip-Angle (mSAVA).
Methods: mSAVA acquires four volumes for simultaneous whole-heart T1 and T2 mapping. We validated mSAVA using simulations, phantoms, and in-vivo experiments at 3T in 11 healthy subjects and 11 patients with diverse cardiomyopathies. T1 and T2 values by mSAVA were compared with modified Look-Locker inversion recovery (MOLLI) and gradient and spin echo (GraSE), respectively. The clinical performance of mSAVA was evaluated against late gadolinium enhancement (LGE) imaging in patients.
Results: Phantom T1 and T2 by mSAVA showed a strong correlation to reference sequences (R2 = 0.98 and 0.99). In-vivo imaging with an imaging resolution of 1.5 × 1.5 × 8 mm3 could be achieved. Myocardial T1 and T2 of healthy subjects by mSAVA were 1310 ± 46 and 44.6 ± 2.0 ms, respectively, with T1 standard deviation higher than MOLLI (105 ± 12 vs 60 ± 16 ms) and T2 standard deviation lower than GraSE (4.5 ± 0.8 vs 5.5 ± 1.0 ms). mSAVA T1 and T2 maps presented consistent findings in patients undergoing LGE. Myocardial T1 and T2 of all patients by mSAVA were 1421 ± 79 and 47.2 ± 3.3 ms, respectively.
Conclusion: mSAVA is a fast 3D technique promising for clinical whole-heart T1 and T2 mapping.
期刊介绍：
Journal of Cardiovascular Magnetic Resonance (JCMR) publishes high-quality articles on all aspects of basic, translational and clinical research on the design, development, manufacture, and evaluation of cardiovascular magnetic resonance (CMR) methods applied to the cardiovascular system. Topical areas include, but are not limited to:
New applications of magnetic resonance to improve the diagnostic strategies, risk stratification, characterization and management of diseases affecting the cardiovascular system.
New methods to enhance or accelerate image acquisition and data analysis.
Results of multicenter, or larger single-center studies that provide insight into the utility of CMR.
Basic biological perceptions derived by CMR methods.
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