 Myocardial infarction MI frequently recurs after non-ST elevation MI NSTEMI that may be related to insufficient vulnerable plaque identification using invasive coronary angiography. Furthermore, the natural behaviour of vulnerable plaques in NSTEMI over time and their relation with biomarkers need further exploration. More accurate identification and assessing long-term behaviour of vulnerable plaques may improve therapeutic strategies and clinical outcome. The investigators hypothesize that fully integrated 18Fluoride Sodium-Fluoride 18F-NaF Positron Emission TomographyCardiac Magnetic Resonance imaging PETCMR increases the ability to detect vulnerable plaques as compared to coronary angiography. 