Correction with blood T1 is essential when measuring post-contrast myocardial T1 value in patients with acute myocardial infarction by Choi Eui-Young, Hwang Sung Ho, Yoon Young Won, Park Chul Hwan, Paek Mun Young, Greiser Andreas, Chung Hyemoon, Yoon Ji-Hyun, Kim Jong-Youn, Min Pil-Ki, Lee Byoung Kwon, Hong Bum-Kee, Rim Se-Joong, Kwon Hyuck Moon, Kim Tae Hoon