There were thirty two patients which had dubious focus after radiotherapy were detected by CT and 18 F - FDG/DHC, the accurate diagnosis by CT or 18 F - FDG/DHC were fourteen or twenty nine respective.

• 放疗后CT早期复查发现病情变化的32位患者中,CT能明确病变性质者14例,181F-FDG/DHC为29例。