Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly with left ventricular configuration . There is increased retrocardiac density , though no apparent effacement of the diaphragm . The possibility of left lower lobe collapse and / or consolidation can not be entirely excluded . Curvilinear density overlying the left are border raises the question of an effusion . No pneumothorax . Sternotomy wires are intact .
    OUTPUT:
    
Moderate cardiomegaly . Increased retrocardiac density uncertain significance -- question compressive atelectasis , but the possibility of a pleural effusion and / or left lower lobe consolidation can not be excluded . . If clinically indicated , conventional PA and lateral views when the patient is able could help to further assess the left lower lobe .