Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , accentuating the cardiac silhouette and bronchovascular structures . The cardiomediastinal silhouette and pulmonary vasculature are within normal limits considering this factor and rightward patient rotation . The aorta is tortuous . There is no pleural effusion or pneumothorax . The lungs are grossly clear .
    OUTPUT:
    
No acute intrathoracic abnormality on this limited study . Repeat radiograph with improved positioning and greater inspiratory effort may be helpful for more complete assessment of the thorax when the patient is clinically able .