Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP radiograph of the chest was obtained . Moderate - to - severe enlargement of the cardiac silhouette is not significantly changed . There is pulmonary venous congestion with predominantly perihilar and right lower lung heterogeneous opacities as well as Kerley B lines , most consistent with mild interstitial pulmonary edema . Given the slight asymmetry of the opacities at the right lung base , a superimposed infectious process can not be excluded . There may be a small right pleural effusion . No pneumothorax is seen . The mediastinal contours are grossly unchanged .
    OUTPUT:
    
1 . Mild interstitial pulmonary edema , likely cardiogenic in nature given moderate cardiomegaly . 2 . Possible small right pleural effusion . 3 . Heterogeneous opacities at the right lung base could be atelectasis , although an infectious process can not be excluded . Short - term follow - up radiographs may be helpful to evaluate further if clinically indicated .