Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates intact median sternotomy wires , unchanged position of prosthetic valve , and right PICC tip in the low SVC . The lungs are moderately well expanded mild bilateral lower lobe atelectasis and stable mild vascular congestion . No focal opacity . Stable small bilateral pleural effusions are noted . No pneumothorax . Stable mild cardiomegaly . Mediastinal contour and hila are unremarkable . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
1 . Right PICC tip in low SVC . 2 . Mild bilateral lower lobe atelectasis . 3 . Stable mild cardiomegaly , small bilateral pleural effusions , and mild vascular congestion