Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable mediastinal and hilar contours . Moderate cardiomegaly evident with crescentic density projecting in the expected location of the mitral valve , likely representing enlarged significantly calcified mitral valve . Lungs are clear . No pleural effusion or pneumothorax evident . No narrowing of the trachea identified .
    OUTPUT:
    
Significantly calcified mitral annulus . No deviation or narrowing of the trachea identified .