Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left PICC tip terminates in the mid SVC . Heart size is decreased compared with the prior study , now appearing borderline enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . There are mild patchy opacities in the lung bases in the setting of low lung volumes . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Low lung volumes with patchy opacities in lung bases , potentially atelectasis , but infection can not be excluded in the correct clinical setting .