Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . When compared with the prior cardiac MRI , there is a similar pattern of hilar and perihilar opacity consistent with known sarcoidosis . Difficult to exclude a subtle superimposed pneumonia . No large effusion or pneumothorax . No convincing signs of edema . Heart size appears unchanged . Bony structures are intact .
    OUTPUT:
    
Bilateral hilar and perihilar opacities similar in appearance from prior cardiac MR likely reflects known sarcoid . Difficult to exclude a superimposed pneumonia though overall pattern is largely unchanged allowing for differences in technique .