Radiology Department Shandong Cancer Hospital Ji’nan China;
Radiology Department Shandong Cancer Hospital Ji’nan China;
Radiology Department Shandong Cancer Hospital Ji’nan China;
Radiology Department Shandong Cancer Hospital Ji’nan China;
Radiology Department Shandong Cancer Hospital Ji’nan China;
Radiology Department Shandong Cancer Hospital Ji’nan China;
Mouth mucosa; Oxygen atomization inhalation; Radiotherapy; Radiation injuries;