Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable frontal radiograph of the chest was acquired . Lung volumes are slightly low , causing bronchovascular crowding . Streaky opacities at both lung bases are likely atelectasis , although early infection could have a similar appearance . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
Low lung volumes with streaky bilateral lower lung opacities , possibly atelectasis , although infection can not be excluded . If there is persistent concern for pneumonia , recommend further evaluation with PA and lateral radiographs at end inspiration .