Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The lateral contour of the descending aorta and inferior left heart border are indistinct , which may be secondary to technique and body habitus as well as low lung volumes with atelectasis ; however , focal consolidation and pneumonia can not be definitely excluded in the appropriate clinical situation . No pleural effusion . No pneumothorax . The heart size appears enlarged , which may in part be secondary to technique . There is mild cardiovascular congestion .
    OUTPUT:
    
1 . Mild vascular congestion and probable mild cardiomegaly . 2 . Retrocardiac opacity , may be atelectasis with low lung volumes and secondary to technique / body habitus , but focal consolidation suggesting pneumonia can not be excluded in the appropriate clinical situation .