Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates probably stable moderate cardiomegaly allowing for AP technique . Mild tortuosity to the thoracic aorta is unchanged . Lung volumes are mildly decreased , but there appears to be subtle increased perihilar vascular congestion ; however , no large effusion is noted .
    OUTPUT:
    
Moderate cardiomegaly and perivascular congestion without pleural effusion .