Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Left chest wall Port - A - Cath is seen with catheter tip extending to the low SVC . Midline sternotomy wires are noted . The lungs appear clear bilaterally . The heart is mildly enlarged which is unchanged . The mediastinal contour appears normal . No acute bony abnormalities .
    OUTPUT:
    
Mild cardiomegaly unchanged . No signs of pneumonia or edema .