Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The lung volumes are low . There is no pleural effusion or pneumothorax . Diffuse bilateral opacification is most confluent in the lower portions of the lung and particularly in the lower part of the right lobe and at the right lung base . Bony structures are unremarkable .
    OUTPUT:
    
Diffuse lung opacification . A focal right basilar opacity suggests atelectasis , although a focus of bronchopneumonia could be considered . More generally , diffuse opacification is not very specific and could be seen with pulmonary edema , diffuse pneumonia , or alternatively other forms of acute lung injury .