Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal view of the chest demonstrate persistent opacity in the right upper lobe . There is a heterogeneous opacity in the right medial lung base , which appears slightly more conspicuous since prior . There are prominent interstitial lung markings , which may reflect underlying interstitial edema . Lung volumes are low . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Partially imaged upper abdomen is unremarkable . No pleural effusion is seen . No pneumothorax .
    OUTPUT:
    
Persistent right upper lobe opacity . Heterogeneous right lung base opacity is slightly more conspicuous since prior , which may reflect multifocal pneumonia . Dedicated PA and lateral views would be helpful if / when patient able .