Determination of absorbed dose measurement between art phantom and cadplan of 10 mV x-ray

A study about inter comparison of absorbed dose measurement with CadPlan 3-Dimensional system treatment planning and thermoluminescent dosimeter (TLD-100) by using ART anthromorphic phantom with high energy X-ray was done to achieve homogeneity of dose throughout the target volume of ,,b5%. The accuracy and precision in dose calculation by using computerized treatment planning systems for high energy photon has been determine throughout the average of dose comparison. The measured dose from TLD-100 in the phantom is compared with the calculated dose of CadPlan 3-D system treatment planning which the dose is delivered with an error of less than 5%. The result showed that percentage deviation of target volume is 1.46%. This means that the planning of the treatment dose through CadPlan 3-D system treatment planning is accurate, because of the maximum dose was given to the treated volume without increasing the risk of tissues. Wedge 300 and Multi-Leaf Collimator were used in this study with the accuracy within ,,b5%, to avoid any complication of the radiobiological risk to the organs at risk (eyes; V1.6%). The dose of spinal cord was under-dose with V31.01%. This was because of the existent of air-gaps in between the slices of phantom, which had influenced the reading of the TLD-100. As a conclusion, CadPlan 3-D system treatment planning is suitable for the radiotherapy treatment. Keywords: CadPlan 3-D System Treatment Planning, TLD-100, target volume, homogeneity, high energy photon. (Author)