Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . A large retrocardiac opacity containing foci of gas may represent a large hiatal hernia though this would be new from the prior imaging studies . Left lower lobe opacity may represent pneumonia . Small pleural effusions are seen , left greater than right . A hazy opacity in the right lower lung is indeterminate . Small nodules project over the upper lungs which are new from the prior study . Heart size can not be assessed . No large pneumothorax . Bony structures are intact .
    OUTPUT:
    
Large retrocardiac density which may in part reflect the presence of a hiatal hernia though consolidation in the lower lungs concerning for pneumonia with small pleural effusions . Nodules project over the upper lungs which require further evaluation with CT .