Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes which results in bronchovascular crowding . There are increased streaky opacities at the bilateral bases which likely represent atelectasis , however superimposed infection can not be excluded . Perihilar prominence of vessels suggests pulmonary vascular engorgement . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Increased streaky opacities at the bilateral bases which likely represent atelectasis , however superimposed infection can not be excluded . 2 . Perihilar prominence of vessels suggests pulmonary vascular engorgement .