Journal
MAGNETIC RESONANCE IMAGING
Volume 36, Issue -, Pages 128-134Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.mri.2016.10.030
Keywords
Mapping; Imaging; Magnetic resonance imaging; Ventricles
Funding
- Kakenhi from Japan Society for the Promotion of Science (JSPS) [26870339, 16K09017]
- Grants-in-Aid for Scientific Research [16H01849, 26870339, 16K09017] Funding Source: KAKEN
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Background: The left ventricle (LV) wall thickness is an important and routinely measured cardiologic parameter. Here we introduce three-dimensional (3D) mapping of LV wall thickness and function using a self-gated magnetic resonance (MR) sequence for ultra-high-field 11.7-T MR cine imaging of mouse hearts. Methods and results: Six male C57BL/6-j mice were subjected to 11.7-T MR imaging (MRI). Three standard views short axis, long axis four-chamber, and long axis two-chamber and eight consecutive short axis scans from the apex to base were performed for each mouse. The resulting 11 self-gated cine images were used for fast low-angle shot analysis with a navigator echo over an observation period of approximately 35 min. The right ventricle (RV) and LV were identified in the short axis and four-chamber views. On 3D color-coded maps, the interventricular septum wall (diastole: 0.94 +/- 0.05 mm, systole: 1.20 +/- 0.09 mm) and LV free wall (diastole: 1.07 +/- 0.15 mm, systole: 1.79 +/- 0.11 mm) thicknesses were measured. Conclusion: This 3D wall thickness mapping technique can be used to observe regional wall thickness at the end diastole and end-systole. Self-gated cine imaging based on ultra-high-field MRI can be used to accurately and easily measure cardiac function and wall thickness in normal mouse hearts. As in the preclinical study, this versatile and simple method will be clinically useful for the high-field-MRI evaluation of cardiac function and wall thickness. (C) 2016 Elsevier Inc. All rights reserved.
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