Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs without pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal . A right upper extremity PICC tip is unchanged in position in the mid SVC . The pulmonary vasculature is normal .
    OUTPUT:
    
No acute chest abnormality .