Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . The lungs are clear . Poor visualization of the left hemidiaphragm on the frontal projections may relate to a prominent epicardial fat pad . Mild cardiomegaly is not significantly changed . The mediastinal contours are normal . No pleural effusions are seen . There is no pneumothorax . Multilevel degenerative changes of the thoracolumbar spine are noted .
    OUTPUT:
    
No acute cardiac or pulmonary process .