Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged including tortuosity of the aorta and borderline cardiomegaly . There is a mild interstitial abnormality suggestive of pulmonary vascular congestion . Patchy opacities are present at both lung bases , not specific although most suggestive of atelectasis . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
Findings suggesting mild vascular congestion . In the appropriate clinical setting , atypical pneumonia could also be considered . Also , although it is difficult to exclude focal pneumonia at the lung bases , patchy basilar opacities with low lung volumes could also be seen with atelectasis .