Analisis Perbandingan Nilai NTID OAR Sigmoid Colon, CI, dan HI pada Teknik 3D-CRT dan IMRT terhadap Kanker Rektum
DOI:
https://doi.org/10.24252/jft.v12i2.59407Keywords:
3D-CRT, IMRT, NTID, Rectum Cancer, Sigmoid ColonAbstract
A study was conducted to analyze the comparison of Normal Tissue Integral Dose (NTID) in the sigmoid colon OAR, Conformity Index (CI), and Homogeneity Index (HI) in rectal cancer cases using 3D-CRT and IMRT techniques based on data from the Treatment Planning System (TPS) for five rectum cancer patients. The objective of this study was to compare the NTID values of the sigmoid colon OAR, as well as CI and HI, between the 3D-CRT and IMRT techniques. The research was conducted using data from five rectum cancer patients treated at TK II Pelamonia Hospital, where each patient received a total radiation dose of 50 Gy, delivered in 25 fractions of 2 Gy per session. Data were collected through analysis of the Dose Volume Histogram (DVH), which included the volume of the tumor receiving 95% of the prescribed dose, total tumor volume, radiation doses at 2%, 50%, and 98% of the target volume, mean dose, and the volume of the Organ at Risk (OAR). The results showed that the NTID values for the sigmoid colon OAR ranged from 0.87 to 21.11 Gy for the 3D-CRT technique, and from 2,7 to 9,86 Gy for the IMRT technique. The CI values for both techniques ranged from 0.95 to 0.99, while the HI values were between 0,07 and 0,18 for 3D-CRT, and 0,08 to 0,13 for IMRT none of which exceeded the value of 1, which indicates that the isodose curve at the prescribed dose is able to accurately and completely encompass the entire Planning Target Volume (PTV).
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