Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exam from ___ . Somewhat linear left basilar opacity is again seen suggestive of atelectasis . Elsewhere the lungs are clear of consolidation or effusion . Again seen is prominent mediastinal contour superiorly on the right , potentially due to tortuous vessels however as previously suggested nonurgent CT suggested to further characterize . Degenerative changes seen at shoulders bilaterally .
    OUTPUT:
    
No definite acute cardiopulmonary process . Upper mediastinal contour on the right as on prior potentially due to tortuous vessels however CT scan suggested on a nonurgent basis unless already performed or if older films become available to document significant stability .