a-e) 45 year old male with acutre anterior STEMI. Fusion (c) of MRA (a) and MRFTI (b) revealed mid LAD stenosis with thrombus formation (arrow). Late enhancement (LE) images showed non-transmural septal infarction with sub-endocardial microvascular obstruction (arrow). Corresponding XRA showed slwo flow with 90-95% mid LAD stenosis with thrombus (culpirt lesion). Thrombectomy performed with an Export catheter. f-j) 73 year old male with failed thrombolysis after acute inferior STEMI. Fusion (h) of MRA (g) and MRDTI demonstrate tight proxiomal to mid RCA stenosis with thrombus (arrow). LE images showed extensive transmural scarring of the infero-septal to infero-lateral segments with microvascular obstruction (arrow). XRA showed total occlusion of the RCA, collateralised by the left coronary arteries.