Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relatively low lung volumes are seen with relative elevation of the left hemidiaphragm as seen on prior CT . Linear opacity in the right midlung laterally is compatible with atelectasis . There is no consolidation or effusion . Known right apical nodule on prior CT is not clearly delineated by plain film . No acute osseous abnormalities identified . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
No acute cardiopulmonary process . Known right apical right pulmonary nodule not delineated by x-ray .