Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Degree of inspiration is small with results in crowding of bronchovascular markings at the bases , however even taking this into account , there is probably some streaky left retrocardiac subsegmental atelectasis . No parenchymal or hilar mass is seen and no pleural fluid is present . No central pulmonary vascular congestion or edema is present and cardiac size is within normal limits . Thoracic vertebral bodies appear demineralized from maintained in height alignment .
    OUTPUT:
    
Left retrocardiac subsegmental atelectasis , possibly exaggerated due to small lung volumes .