Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right PICC extends to the low SVC , near the cavoatrial junction . There are surgical clips in the right upper quadrant . The lung volumes remain low , with resultant bronchovascular crowding . Additionally , in comparison to multiple prior studies , there is progressive opacity involving the left hemithorax , with indistinctness of the normal vascular and interstitial markings . While it is conceivable that this represents asymmetric edema , the appearance is more concerning for an evolving infectious process . The right lung is relatively well aerated . There is no large effusion , and there is no pneumothorax . Hilar and cardiomediastinal contours are difficult to assess given rotation and low lung volume , though appear stable .
    OUTPUT:
    
Increasing opacity in the left hemithorax is concerning for an evolving infectious process . Close radiographic follow - up is warranted . The right lung remains well aerated .