Age- and gender-dependence of myocardial and blood T1. A) Measured myocardial T1 within manually drawn myocardial contours demonstrated a small elevation of T1 in young females. B) Myocardial midwall T1 (see partial volume section), indicated a similar persistent gender difference, albeit at a slightly lower T1 likely due to reduction of blood partial volume. C) Left Ventricle blood T1. D) Right Ventricle blood T1. Note: Unpaired student T-test p-values are marked above each bar for age-groups when Bonferroni-corrected significance threshold is achieved for gender difference.