This document discusses cardiac imaging modalities such as CT, MRI, echocardiography, and nuclear scintigraphy used by cardiac surgeons. It provides information on how to perform good quality CT and MRI imaging, and what each modality can be used to visualize such as coronary artery anatomy, post-procedure evaluation, congenital heart disease, and cardiac function. The document also covers contraindications of CT and MRI, how to decide between the modalities, and risks of contrast-induced nephropathy.