Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph . Tracheostomy tube and right PICC are unchanged . Chin obscures the right apex ; however , the remainder of the lungs appear well expanded and clear . There is no pleural effusion or pneumothorax . Heart and mediastinal contours are unchanged .
    OUTPUT:
    
No acute intrathoracic process .