Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The replaced tracheostomy tube ends about 2 .5 cm from the carina , slightly lower than the prior exam but appropriately positioned . The left PICC line ends in the mid SVC . Lung volumes are low . Right lower lung hazy opacity is compatible with dependent pleural effusion , overall unchanged . Widened mediastinum , in part secondary to tortuous thoracic aorta is overall unchanged . Cardiac silhouette is unchanged . No pneumothorax .
    OUTPUT:
    
Replaced tracheostomy tube is appropriately positioned . Otherwise , no significant interval change .