Conformity and Homogeneity Indices for Brain Cancer Patients Using 3DCRT Technique

Abstract

Background: 3D conformal radiotherapy 3DCRT technique are used to treat patients with brain cancer. Goal: this study aims to compare conformity and homogeneity indices for eight patients of brain cancer by using three-dimension conformal radiotherapy (3DCRT) technique on planning target volume (PTV) located in brain. Methods: Comparative study of Conformity and Homogeneity indices for ten brain cancer patients during period from October 2019 to March 2020 that carried out at ZCC (Zhianawa Cancer Center) in Sulaimany-Iraq. 3DECRT technique was applied to get the heist dosage to the target volume (tumor) and lowest dose to the healthy structures around the tumor. By using Linear Accelerator machine- LINAC, Elekta synergy type with 6MV photon beam. SPSS-version 22 was applied for analyzing and caring out the data measurements. Results: It has been observed from the results, in both techniques the highest conformity and homogeneity indices have the acceptable values, in this study with 3D-CRT plan technique showed that the mean conformity and homogeneity indices were (0.1999 ± 0.03, 0.9457 ± 0.05) respectively. The mean dose values for organs at risk spinal cord and brain stem were (41.98 ± 2.23, 26.01 ± 16.62) respectively, for ten right and left parotid glands were (23.52 ± 3.99, 23.34 ± 3.93) respectively. In both plans, the average dose values for all organs at risk mentioned above were less than tolerance radiation doses. Conclusion: This study also supports that indices of homogeneity and conformity are important tools for improving the long-term quality of life of brain cancer patients using 3DCRT technology.