Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Low lung volumes accentuate the cardiac silhouette and result in crowding of bronchovascular structures . . There is no large pleural effusion or pneumothorax . Patchy opacity at right lung base is nonspecific but potentially due to atelectasis in the setting of low lung volumes .
    OUTPUT:
    
Limited assessment due to low lung volumes . Repeat radiograph with improved inspiratory level would assist in evaluating the cardiovascular status of the patient and in more fully characterizing a patchy opacity at the right lung base .