Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube appears to be in unchanged position . Left - sided Port - A - Cath tip terminates in the proximal right atrium , unchanged . Cardiac , mediastinal and hilar contours are normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Marked gaseous distension of the colon is noted within the upper abdomen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .