Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with secondary crowding of the bronchovascular structures . There is no obvious consolidation , effusion or evidence of edema . Linear left midlung opacity is likely atelectasis . Cardiac silhouette is within normal limits . No acute osseous abnormalities . Calcific densities in the right upper quadrant may be related to the gallbladder .
    OUTPUT:
    
No acute cardiopulmonary process .