Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are poorly expanded with a retrocardiac opacity as well as a more subtle opacity in the right cardiophrenic angle . There is diffuse increased interstitial markings as well as increased vascular markings with upper re-distribution . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Constellation of findings is compatible with a left lower lobe pneumonia and possible right lower lobe pneumonia on the background of interstitial pulmonary edema .