Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Right upper extremity access PICC line is again seen with its tip in the mid SVC region . The heart remains moderately enlarged . Lung volumes are low though lungs appear clear . No signs of pneumonia or edema . No large effusion or pneumothorax . Bony structures are intact . Mediastinal contour is unremarkable .
    OUTPUT:
    
Moderate cardiomegaly . Appropriately positioned PICC line . No signs of pneumonia or edema .