Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are somewhat low in volume with bibasilar left greater than right atelectasis , at least in part owing to chronic elevation of the left hemidiaphragm , which is slightly increased on the current study . No focal consolidation concerning for pneumonia is seen . Mild vascular redistribution is seen , suggesting vascular congestion without overt edema identified on this study . Mild cardiomegaly is unchanged with a tortuous aorta .
    OUTPUT:
    
Mild vascular congestion without evidence of pneumonia .