Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates obscuration of the right heart border by a patchy opacity . The left pulmonary artery appears prominent , the right hila unremarkable . The aorta appears tortuous or alternatively dilated . Interstitial markings are identified at the left lung base suggestive of pulmonary edema . Biapical scarring appear symmetric . There is no pleural effusion or pneumothorax . Visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . Patchy opacity obscuring the right heart border may reflect aspiration or alternatively early pneumonia in the correct clinical setting . 2 . Prominent left pulmonary artery and interstitial interstitial markings at the left base suggests vascular congestion and mild pulmonary edema .