Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Coarse bilateral reticular opacities are in keeping with the known history of fibrosis . As compared to the prior chest radiograph from ___ , new superimposed interstitial opacities suggest an acute process such as infection or pulmonary edema . Moderate cardiomegaly is stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
New diffuse interstitial opacities superimposed on chronic fibrosis may be due to exacerbation of interstitial lung disease , infection or edema . A dedicated chest CT may be performed for further evaluation if clinically warranted .