[ABSTRAK
Volumetric Modulation Arc Therapy (VMAT) merupakan salah satu modalitas untukpengobatan kanker yang mempunyai beberapa teknik penyinaran. Dalam penelitiandilakukan karakteristik dosimetri dan dosimetri invivo menggunakan TLD-100 roddan film gafchromic EBT3 dengan teknik full arc dan half arc VMAT pada fantomrando kasus kanker parotid kiri dan kanker paru ? paru apeks kiri yang masing -masing memiliki empat target dengan volume yang berbeda. Evaluasi yang dilakukanmeliputi parameter penyinaran, Homogeneity Index (HI), Conformity Index (CI) dandeviasi pengukuran dosis menggunakan TLD dan film dengan TPS. Total MU yangdigunakan dan waktu penyinaran, teknik full arc lebih besar dibandingkan teknik halfarc. Selain itu, laju dosis yang diperlukan untuk VMAT teknik full-arc lebih rendahdibandingkan dengan teknik half arc,Teknik full arc lebih homogen dan konformitasdibandingkan pada teknik half arc. Pada pengukuran dosis titik menunjukkan bahwateknik full-arc dan half-arc mempunyai nilai deviasi yang tidak besar, danpenggunaan TLD lebih efektif jika dibandingkan dengan film, dimana rata ? ratadeviasi dosis penggunaan TLD antara 3,79 ? 5,76 % untuk target dan 6,38 ? 9,3 %untuk organ at risk (OAR), dan pada penggunaan film antara 5,69 ? 11,85 % untuktarget dan 34,40 ? 215,76 % untuk OAR.
ABSTRACTVolumetric Modulation Arc Therapy (VMAT) is one of the modalities for cancertreatment that have some technique. This study conducted, dosimetrycharacterizations and determination dose by TLD and gafchromic EBT3 film withfull arc and half arc VMAT technique at rando phantom for left parotid cancer andleft apex lung cancer case, which each case have four target different volumes.Evaluation was conducted on the irradiation parameters, homogeneity index (HI),Conformity Index (CI) and the deviation of dose measurement using TLD and filmswith TPS. On VMAT, the total MU which used and the total of delivery treatmenttime, on full arc technique is greater than the half arc technique. Results of the studythe dose rate necessary for VMAT technique of full arc lower than the technique ofhalf arc, VMAT technique full arc more homogeneous and conformity compared tothe technique of half arc. The measurement of the dose point of use TLD is moreeffective than the use of the film, where deviations dose average using TLD between3.79 to 5.76 % for target and 6.36 to 9.3 % for organ at risk (OAR), and the use offilm between 5.69 to 11.85 % for target and 34.4 to 215.76 % for OAR.;Volumetric Modulation Arc Therapy (VMAT) is one of the modalities for cancertreatment that have some technique. This study conducted, dosimetrycharacterizations and determination dose by TLD and gafchromic EBT3 film withfull arc and half arc VMAT technique at rando phantom for left parotid cancer andleft apex lung cancer case, which each case have four target different volumes.Evaluation was conducted on the irradiation parameters, homogeneity index (HI),Conformity Index (CI) and the deviation of dose measurement using TLD and filmswith TPS. On VMAT, the total MU which used and the total of delivery treatmenttime, on full arc technique is greater than the half arc technique. Results of the studythe dose rate necessary for VMAT technique of full arc lower than the technique ofhalf arc, VMAT technique full arc more homogeneous and conformity compared tothe technique of half arc. The measurement of the dose point of use TLD is moreeffective than the use of the film, where deviations dose average using TLD between3.79 to 5.76 % for target and 6.36 to 9.3 % for organ at risk (OAR), and the use offilm between 5.69 to 11.85 % for target and 34.4 to 215.76 % for OAR., Volumetric Modulation Arc Therapy (VMAT) is one of the modalities for cancertreatment that have some technique. This study conducted, dosimetrycharacterizations and determination dose by TLD and gafchromic EBT3 film withfull arc and half arc VMAT technique at rando phantom for left parotid cancer andleft apex lung cancer case, which each case have four target different volumes.Evaluation was conducted on the irradiation parameters, homogeneity index (HI),Conformity Index (CI) and the deviation of dose measurement using TLD and filmswith TPS. On VMAT, the total MU which used and the total of delivery treatmenttime, on full arc technique is greater than the half arc technique. Results of the studythe dose rate necessary for VMAT technique of full arc lower than the technique ofhalf arc, VMAT technique full arc more homogeneous and conformity compared tothe technique of half arc. The measurement of the dose point of use TLD is moreeffective than the use of the film, where deviations dose average using TLD between3.79 to 5.76 % for target and 6.36 to 9.3 % for organ at risk (OAR), and the use offilm between 5.69 to 11.85 % for target and 34.4 to 215.76 % for OAR.] |
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