Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Asymmetric opacification of the right lung base with respect to the left could be due to basilar pneumonia . No pleural effusion or pneumothorax is detected . The pulmonary vasculature is moderately engorged , but there is no overt pulmonary edema . The cardiac silhouette is moderately to severely enlarged with left atrial and ventricular enlargement particularly striking on the lateral view . The thoracic aorta is tortuous . The mediastinal and hilar contours are otherwise within normal limits .
    OUTPUT:
    
Probable right lower lobe pneumonia . Moderate to severe cardiomegaly chronic , vascular engorgement of uncertain chronicity ; whether there is acute on chronic cardiac decompensation is radiographically indeterminate without prior imaging for comparison .