Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are decreased compared to the previous examination . Heart size appears mildly enlarged , slightly increased from prior , likely related to the decreased lung volumes . Mediastinal and hilar contours are unremarkable . Mild pulmonary vascular congestion appears new in the interval . More focal patchy opacity is seen within the medial right lung base , which could reflect atelectasis , but infection is not excluded in the correct clinical setting . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities are present .
    OUTPUT:
    
Decreased lung volumes compared to prior . Mild pulmonary edema , new in the interval . Patchy right basilar opacity may reflect atelectasis , but infection is not excluded in the correct clinical setting .