Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study limited due to patient rotation . In addition , the arm overlies the chest on the lateral view . The cardiomediastinal silhouette is stable . The hila are grossly unremarkable . There are patchy left lower lung opacities which are similar in appearance to prior exam from ___ , likely reflecting atelectasis . Otherwise , there is no focal lung consolidation . There is no pneumothorax . There is no pulmonary edema . There are small effusion seen posteriorly , likely bilateral . There is no sizable pleural effusion . There is no evidence of a displaced rib fracture .
    OUTPUT:
    
1 . No displaced rib fracture identified . Please note that radiography is not sensitive for the detection of subtle or nondisplaced rib fractures . 2 . Patchy left lung opacities likely reflect atelectasis , unchanged from prior . 3 . Small posterior pleural effusions , likely bilateral .