Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to earlier the same day at 12 :53 p .m . and allowing for technical differences , the degree of opacity at the right base may be slightly increased . The degree of opacity at the left lung apex is also increased . Otherwise , I doubt significant interval change . As before , there is truncation of the left - sided airway , though this occurs slightly more proximal now at the distal left main stem bronchus , with near - complete opacification of the left lung , notably worse in the left lung apex than it was on the prior film . The left hemidiaphragm is obscured . The right lung shows background COPD with patchy opacity and possible pleural fluid / thickening at the right base , which also appears slightly worse compared with the prior film . Allowing for patient rotation , the trachea remains midline . An area of focal expansion of the trachea immediately above the aortic knob is suggested , probably unchanged . There is mild vascular plethora visualized in the aerated portion of the right upper lung , but otherwise , no definite evidence of CHF .
    OUTPUT:
    
Overall similar to CXR from earlier the same day , but with increased opacity at left apex and ? right base since that film . Compared with the film from ___ , where there was considerable opacification of the left mid zone , findings in the left upper lung and right base have clearly progressed . If clinically indicated , CT may help for further assessment .