Analysis of Myocardial T₁ Value for Japanese Healthy Subjects with Non-contrast Myocardium T₁ Mapping

Abstract

The purpose of this study was to analyze the native T₁ value of myocardium and the relationship between myocardial native T₁ value and gender, age and myocardial areas in Japanese. The subject of this study was 145 Japanese healthy subjects who underwent cardiac magnetic resonance imaging (MRI) at medical examination. MRI scanner was Ingenia 1.5T (Philips Healthcare, Best, The Netherlands). T₁ mapping was acquired with modified look-locker inversion recovery method using IR pulse. The native T₁ value of all subjects was 983.5±34.8 ms, and we were able to acquire the reference value of the native T₁ value at our hospital. The native T₁ value was significantly higher in females than in males. There was variation in native T₁ value among the myocardial areas, and the native T₁ value was significantly higher in the septum than in the lateral region. In the future, collaborative research in multicenter is necessary to obtain the reference value of Japanese.