Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates mild interstitial markings diffusely , likely not clinically significant . No focal opacity is seen . There is no pleural effusion identified . The heart is mildly enlarged . No pulmonary edema is seen . The hilar contour is within normal limits . No acute osseous abnormality is seen .
    OUTPUT:
    
Mild cardiomegaly . Otherwise , chest radiograph is essentially unremarkable .