Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: T - shaped tracheostomy tube appears in unchanged position . Heart size remains mildly enlarged . Mediastinal and hilar contours are unremarkable . There is mild cephalization of pulmonary vascular markings without overt pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is identified . Linear opacities in the lung bases likely reflect areas of atelectasis . No acute osseous abnormalities seen . Small amount of subcutaneous emphysema in the supraclavicular regions is seen bilaterally .
    OUTPUT:
    
No acute cardiopulmonary abnormality .