Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Analysis is performed in direct comparison with the next preceding similar study ___ ___ . A tracheostomy cannula is in place , seen to terminate in the trachea 5 cm above the level of the carina . The position is unchanged . A right - sided PICC line is noted , seen to terminate overlying the right - sided mediastinal structures at the level of the carina . This corresponds to the mid portion of the SVC . There is no evidence of pneumothorax in the apical area . The heart size may have increased mildly in comparison with the previous portable chest examination , but this assessment is uncertain , considering portable technique and bedside examination resulting in geometric distortion . The pulmonary vasculature appears more crowded than before , but this is most likely related to patient 's poorer inspirational effort with relatively high - positioned diaphragms . Perivascular haze or central pulmonary edema can not be identified on this portable examination . Also , the lateral pleural sinuses are free from any major pleural effusion . No new acute discrete parenchymal infiltrates can be seen ; however , the crowded appearance of the vasculature creates some linear structures on the bases most likely representing atelectasis . More older chest examinations are reviewed and it is noted that the patient had similar chest findings already on ___ before the tracheostomy was performed . The PICC line have been placed and identified on chest examination ___ ___ .
    OUTPUT:
    
Low volume aeration , tracheostomy cannula in unchanged position without pneumothorax . Stable chest findings , no evidence of new acute parenchymal infiltrates .