Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral patchy pulmonary opacities appear slightly increased as compared to the prior study , particularly in the left lower lobe . Patchy opacities involve the mid to lower lungs bilaterally . No large pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are unremarkable . There is gaseous distention of partially imaged bowel .
    OUTPUT:
    
Patchy bilateral mid to lower lung opacities appear slightly increased as compared to the prior study , particularly in the left lower lobe , worrisome for worsened multifocal pneumonia , slightly progressed on the left . Findings involve bilateral lower lobes and possibly right middle lobe and / or lingula . Gaseous distention of partially imaged bowel .