Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous two - view chest x-ray from ___ . Exam is slightly limited secondary to patient body habitus . There is hazy increased opacity at the left lung base which is likely due to overlying soft tissues and prominent pericardial fat pad . There is no evidence of consolidation or effusion . Cardiomediastinal silhouette is within normal limits . Left shoulder arthroplasty is again seen in addition to hypertrophic changes in the spine .
    OUTPUT:
    
No definite acute cardiopulmonary process .