Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs appear clear . No focal opacity is identified to suggest pneumonia or aspiration . There is minimal atelectasis in the left lung base . There is no pulmonary edema or large pleural effusions . There is unchanged moderate - to - severe s - shaped scoliosis of the thoracolumbar spine . The thoracic aorta follows a tortuous course , which appears unchanged from prior . Moderate cardiomegaly is unchanged . A ventriculoperitoneal shunt catheter is partially imaged and appears intact .
    OUTPUT:
    
No acute cardiopulmonary process .