Late-onset radiation-induced myocardial fibrosis after lung cancer radiotherapy: correlation of cardiac MRI with radiation treatment planning CT.

A 55-year-old male with history of prior LCx STEMI and remote chest external beam radiation underwent cardiac MRI(CMR) for aortic regurgitation. CMR demonstrated Nonischemic late gadolinium enhancement (LGE), valvular thickening, and pericardial effusion. Correlation with radiation treatment planning CT supported the diagnosis of radiation-induced myocardial fibrosis despite a history of prior STEMI.