Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are midline and intact and a prosthetic cardiac valve is again noted . Surgical clips are again noted within the upper mid abdomen and overlying the right upper hemithorax . The cardiac , mediastinal and hilar contours are mildly prominent consistent with mild cardiomegaly unchanged from prior exam . No pneumothorax is noted . A small left pleural effusion with associated compressive left basilar atelectasis is slightly worse compared to prior exam . Platelike bibasilar atelectasis is noted . Compression fractures involving the mid thoracic vertebrae are unchanged since the most recent prior exam . Atherosclerotic calcification of the carotid arteries is noted bilaterally .
    OUTPUT:
    
Small left pleural effusion slightly increased compared to prior exam .