Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is somewhat limited by patient rotation . The presence of a dense left breast prosthesis obscures assessment of the left lung base and heart . Cardiac silhouette size appears mildly enlarged but grossly unchanged . The mediastinal and hilar contours are similar . Upper zone vascular redistribution is likely due to supine positioning , without overt pulmonary edema . Patchy opacity within the right lung base may reflect infection or aspiration . There may be a patchy opacity in the left lung base but assessment is suboptimal . No pleural effusion or pneumothorax is clearly seen on this supine exam . No acute osseous abnormality is seen .
    OUTPUT:
    
Patchy right basilar opacity may reflect infection or aspiration . There may be additional left basilar opacification however assessment is limited due to the presence of overlying breast prosthesis .