Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a mildly enlarged heart and low lung volumes resulting in bronchovascular crowding . There are diffuse coarse interstitial opacities likely reflecting known interstitial lung disease , with probable mild superimposed pulmonary edema . Increased opacity in the left lower lobe may reflect patient 's known interstitial lung disease with atelectasis , but infection can not be excluded . There is a possible left pleural effusion . No pneumothorax . Elevation of the right hemidiaphragm is chronic . Compression deformity of an upper lumbar vertebral body is of unclear chronicity .
    OUTPUT:
    
Diffuse coarse interstitial opacities likely reflective of the patient 's known interstitial lung disease with superimposed mild pulmonary edema . More focal opacity in the left lung base could reflect atelectasis , but infection can not be excluded in the correct clinical setting . Possible small left pleural effusion .