Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP radiograph through the chest was provided . Patient is rotated to his left . Lungs are clear with no focal consolidation convincing for pneumonia . Lung volumes are low . Cardiomediastinal and hilar contours when compared to prior study appear unchanged . No evidence of pulmonary edema . A left pectorally placed pacer is seen with leads in stable position . No free air under the right hemidiaphragm is identified . There is no large pleural effusion .
    OUTPUT:
    
No opacity convincing for pneumonia .