Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs demonstrate low lung volumes . Heart is mildly enlarged . Mediastinal silhouette is unremarkable . Left lung demonstrates confluent opacities within the upper and lower lobes concerning for pneumonia . Right lung is clear . No pleural effusion and no pneumothorax .
    OUTPUT:
    
Findings concerning for multifocal pneumonia within the left upper and lower lobes .