Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mild to moderately enlarged . The mediastinal and hilar contours are unchanged with atherosclerotic calcifications at the aortic knob again demonstrated . Mild upper zone vascular re-distribution is presumably due to supine positioning . The opacification over the left mid and lower lung fields appear well marginated , and could be due to overlying soft tissue structures . No other focal consolidation , pleural effusion or pneumothorax is seen . Multilevel degenerative changes are noted in the imaged thoracolumbar spine . Degenerative changes are also noted within both shoulders .
    OUTPUT:
    
Hazy opacification over the left mid and lower lung fields are presumably due to overlying soft tissue . This could be further assessed with a dedicated PA and lateral view of the chest .