Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bilateral regions of reticulonodular opacities predominantly involving the lower and mid lungs , similar in distribution to previous chest x-ray . There continues to be obscuration of the right heart border and left hemidiaphragm , probably reflecting a degree of atelectasis . Left PICC line is similar in position . There is no evidence of pneumothorax .
    OUTPUT:
    
Unchanged appearance of bilateral reticulonodular opacities .