Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs again demonstrate a right PICC with the tip in the mid to low SVC . There has been improvement of generalized opacities , now with asymmetric increased opacity of the left mid-lower lungs . The cardiomediastinal silhouette is unchanged , and there are again probable small pleural effusions . There is no pneumothorax .
    OUTPUT:
    
Improvement of generalized opacities , except for a region of increased opacity of the left mid-lower lungs , representing either asymmetric resolution of ARDS or ARDS coexisting with pneumonia .