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| Clinical Study of Elderly Head and Neck Cancer line CT Plan Dose Distribution in Two-way Influence on Radiation |
| WANG Xieyuan, ZHANG Guihai, FENG Guangyong, et al |
| The Affiliated Hospital of Zunyi Medical College, Guizhou Zunyi 563000, China |
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Abstract Objective: To analyze the elderly head and neck cancer underwent CT treatment plans for two-way influence the dose distribution of radiation, in order to provide reference for the clinical. Methods: From March 2015 to March 2016, the elderly patients with head and neck cancer radiotherapy, were diagnosed by pathology for head and neck cancer, IMRT, a total of 12 patients were collected: 8 cases of nasopharyngeal carcinoma, 2 cases of tonsil carcinoma, 1 case of laryngeal carcinoma, 1 case of tongue cancer, among them 11 cases of male patients and 1 female patient, a comparison process and after radiotherapy of the following indicators: target and organ at risk, parotid gland volume, parotid mass and body midline distance. Results: A two-way process and after radiotherapy, the left and right sides of the parotid gland volume were reduced after treatment (P<0.05), left and right sides of parotid mass and body midline distance were reduced (P<0.05); GTV/PTV D2, Cheng D50, D95, D98, D100 is less than a ride, D95, D98, GTV in the second D100, PTV D50, D95, D98, D100, HI, CI is a low (P<0.05); two-way in bilateral parotid V26, mean dose and right parotid gland V26, the average dose was increased (P <0.05). Conclusion: The elderly head and neck cancer CT plan two-way radiation dose, V26, bilateral parotid mean dose of PTV and GTV, D95, D98 and D100 and PTV doses were significantly different. Clinical attention should be paid to the anatomical structure of patients with large differences, should be at the right time to modify the treatment plan to enhance the treatment effect of patients.
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2017, Vol. 23 
