Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Assessment of the medial lung apices is slightly limited by the patient 's chin and neck projecting over and obscuring these regions . Heart size appears mildly enlarged , accentuated by low lung volumes . The mediastinal and hilar contours are unchanged . Crowding of bronchovascular structures without pulmonary edema is demonstrated . Minimal patchy atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Hypertrophic changes are noted within the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis . No definite radiographic evidence for pneumonia .