Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left PICC tip terminates in the upper SVC . Lung volumes are slightly low . Heart size remains mildly enlarged . Mediastinal contours are unchanged . No pulmonary edema is demonstrated . Linear and patchy opacities within the lung bases , as well as along the fissure in the right upper lobe , are minimally worse in the interval . No pleural effusion or pneumothorax is seen , however the right lung apex is obscured due to the patient 's neck and chin projecting over this region . Mild multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Patchy opacities in the lung bases as well as right upper lobe linear opacity along the fissure , slightly worse in the interval . Findings likely reflect atelectasis though infection is not completely excluded . Left PICC tip in unchanged position in the upper SVC .