Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are faint streaky opacities at the bases and periphery of the mid lungs , similar to the prior study , compatible with atelectasis . There is no focal airspace opacity to suggest pneumonia . The cardiomediastinal silhouette and hilar contours are normal with exception of a tortuous and unfolded aorta . There is no pleural effusion or pneumothorax . There are two screws projecting over the right proximal humerus .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality . Chronic areas of linear atelectasis .