Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Overlying EKG leads are present . Lower lung opacities are predominantly linear and likely represent atelectasis though difficult to exclude an early pneumonia . No definite signs of congestion or edema . Mild cardiomegaly is noted . Mediastinal contour is normal . There are no acute osseous abnormalities .
    OUTPUT:
    
Lower lung opacities likely atelectasis , difficult to exclude an early component of pneumonia . Mild cardiomegaly .