C ase 1. An 85-year-old woman was hospitalized after 3 hours of chest pain and dyspnea. She was diagnosed as having anteroseptal acute myocardial infarction (AMI) from her symptoms and the ECG (elevated ST-T in leads I, aV L , and V 1 through V 3 ). She had to wait for emergency coronary angiography (CAG), because another patient with AMI was occupying the catheter laboratory. During her standby status, contrast-enhancement spiral CT was performed ( Figure 1a ). Total occlusion of the left

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... ior descending coronary artery (segment 7) was observed by the CAG. Six days after successful direct PTCA, plain and Gd-enhancement T1weighted MRI was performed (Figure 1b) . Three days after the PTCA, dual SPECT with 99m Tc-pyrophosphate (hot scan) and 201 Tl was performed (Figure 1c ). Seven days after the PTCA, serial dynamic spiral CT data were obtained at 50 seconds, 3 minutes, and 8 minutes at injection of the contrast material (1.2 mL/s, 100 mL total) (Figure 2) . Case 2. A 49-year-old man presented with chest pain. He was diagnosed as having inferior AMI from his symptoms and the ECG (elevated ST-T in leads II, III, aV F , and V 6 ). CAG demonstrated 99% stenosis of the right coronary artery (segment 4PD). Two days after successful direct PTCA, contrastenhancement spiral CT was performed (Figure 3a ). Three days after the PTCA, dual SPECT with 99m Tc-pyrophosphate (hot scan) and 201 Tl was performed (Figure 3b ).