Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is re- demonstrated . The aorta is tortuous . Pulmonary vasculature is not engorged . Patchy opacities are seen in the left lung base , potentially atelectasis but infection or aspiration can not be excluded . Streaky atelectasis is also demonstrated in the left lung base . No pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Patchy left basilar opacity may reflect atelectasis , but infection or aspiration can not be excluded in the correct clinical setting .