Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low although slightly improved compared to the prior study . A calcified thyroid nodule is again noted . A right - sided PICC terminates in the upper right atrium / cavoatrial junction . There are patchy airspace opacities throughout the left lung , similar in appearance when compared to the prior study . Opacities in the right lung are less conspicuous than on the prior study . No definite pleural effusion , no pneumothorax seen .
    OUTPUT:
    
Persistent bilateral airspace opacities with slight improvement in aeration of the right lung .