Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal semi-upright view of the chest was obtained portably . The tracheostomy is in standard position . Lung volumes are very low , resulting in bronchovascular crowding . Atelectasis is seen at the right lung base . There is no large pneumothorax or pleural effusion . Cardiac and mediastinal silhouettes are stable . No acute osseous abnormality is identified .
    OUTPUT:
    
Right basilar atelectasis . Otherwise , no acute intrathoracic process .