Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Bilateral pleural effusions are noted , small , left greater than right . There is associated compressive lower lobe atelectasis though can not exclude pneumonia . There is mild hilar fullness without frank pulmonary edema . No large pneumothorax . The heart remains mildly enlarged . The mediastinal contour is unchanged with atherosclerotic calcifications noted . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly with bilateral pleural effusions and lower lobe compressive atelectasis as well as mild pulmonary congestion .