Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph , there has been a substantial decrease in size of the left pleural effusion which is almost completely resolved . There is no pneumothorax . A hazy opacity overlying the right upper lobe is unchanged and most likely represents an infection , although asymmetric edema could be considered . There is no right pleural effusion . A right PICC ends in the low SVC . The cardiomediastinal silhouette is normal and unchanged .
    OUTPUT:
    
1 . No pneumothorax . 2 . Right upper lobe opacity is most likely pneumonia , although asymmetric edema can be considered .