Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes accentuate the cardiac silhouette and result in crowding of bronchovascular structures , particularly at the lung bases . With this limitation in mind , note is made of apparent bibasilar retrocardiac opacities . There is no pleural effusion , pneumothorax , or frank pulmonary edema identified . The cardiomediastinal silhouette is within normal limits . Note is made of splenic prominence in the upper abdomen , corresponding to splenomegaly reported on recent ultrasound of the same date .
    OUTPUT:
    
Bibasilar retrocardiac opacities , which could be due to atelectasis , aspiration , and / or infectious pneumonia . Repeat radiograph with improved inspiratory level would allow more complete assessment of this region .