Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal with a left ventricular configuration . The mediastinal and hilar contours are stable with mild atherosclerotic calcification of the aorta . Streaky linear opacities in the lung bases are most likely reflective of atelectasis . No pleural effusion or pneumothorax is visualized . There are no acute osseous abnormalities . The pulmonary vascularity is not engorged .
    OUTPUT:
    
Streaky linear opacities in lung bases most likely reflective of atelectasis .