Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP radiograph of the chest is obtained with the patient in the upright position . Support and monitoring devices are unchanged . Diffuse parenchymal opacities are less dense and lungs are better aerated . Cardiomediastinal contours are unchanged . No pleural effusions and no pneumothorax .
    OUTPUT:
    
Decreased pulmonary parenchymal opacities and better aeration bilaterally .