Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Status post sternotomy . Mild prominence the cardiomediastinal silhouette is unchanged and compatible with recent surgery . There is continued s patchy retrocardiac opacity , consistent with left lower lobe collapse and / or consolidation , with slight elevation left hemidiaphragm and a small left effusion , all similar to the prior film . There is focal opacity in the right cardiophrenic region , likely in the right lower lobe posteriorly . No gross right effusion . No CHF . There is thin linear density at the extreme upper left lung apex , though it does not follow the usual curvilinear course the lung this typically seen with a small pneumothorax .
    OUTPUT:
    
1 . Left lower lobe collapse and / or consolidation and small left effusion is unchanged . 2 . Focal opacity in the right cardiophrenic region , likely in the right lower lobe is more pronounced on the current examination . While this may represent atelectasis , in the appropriate clinical setting , the differential diagnosis could include a focal infiltrate . 3 . Density at left lung apex , equivocal for tiny pneumothorax . Clinical correlation is requested . If clinically indicated , a repeat frontal view of the chest , taken at end - expiration of the respiratory cycle may help for further assessment .