Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest correlated to images from PET - CT from ___ . Slightly increased interstitial markings within the lungs compatible with patient 's history of pulmonary fibrosis , not significantly changed from prior CT scan . There is no evidence of consolidation or effusion . Cardiomediastinal silhouette is within normal limits . Osseous structures are notable for shortening of the right clavicle with an incompletely visualized and likely widened acromioclavicular distance .
    OUTPUT:
    
Evidence of patient 's known pulmonary fibrosis without definite superimposed acute cardiopulmonary process .