Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph was provided . Tracheostomy tube is in appropriate position . The trachea is narrowed as seen previously . A right PICC line has been removed . Compared to the prior radiographs , there is no significant change in the appearance of the lungs . Again seen is a left basilar opacity with obscuration of the left hemidiaphragm which may represent a combination of atelectasis and effusion . There is no overt pulmonary edema . There is no pneumothorax . There are aortic valvular calcifications . The heart is unchanged in size . Bones are intact .
    OUTPUT:
    
Overall , no significant change with left basilar opacity which may represent a combination of atelectasis and pleural effusion .