Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An AP bedside radiograph demonstrates markedly low lung volumes . The cardiomediastinal silhouette , when followed over time , particularly from ___ to today 's study , shows steady progressive enlargement , particularly of the right contour . This raises concern for an enlarging mediastinal fluid collection or hematoma . Mild cardiomegaly which is unchanged . Mild pulmonary edema persists , as well as more prominent atelectasis at the left lung base . An endotracheal tube lies 1 .3 cm above the carina , and although the neck is flexed , the tube should be withdrawn by at least 1 cm to ensure proper positioning . An NG tube courses into the stomach and inferiorly out of the field of view .
    OUTPUT:
    
1 . Progressive widening of the mediastinum raises concern for mediastinal hematoma or fluid collection given the patient 's history of trauma . If there is clinical suspicion for this occurrence , a CT is recommended for further evaluation . 2 . Stable mild congestive heart failure . 3 . The endotracheal tube should be withdrawn by at least 1 cm to ensure proper positioning .