Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is CHF , with interstitial edema . There is increased retrocardiac density , with obscuration of of left hemidiaphragm , consistent with collapse and / or consolidation , but note is also made that the left hemi diaphragm is probably slightly elevated . There is a probable small left effusion . There is also atelectasis at the right lung base . The aorta is calcified and tortuous . The heart is mildly enlarged . No definite pleural effusion or pneumothorax is seen . Gas seen along the upper abdominal wall on the right is not fully characterized , but could lie within the hepatic flexure of the colon .
    OUTPUT:
    
1 . Left lung base opacity concerning for infection . Possible small left effusion . 2 . Right lung base atelectasis . 3 . Cardiomegaly . CHF with interstitial edema .