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KMID : 0357520130360040327
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Journal of Radiological Science and Technology
2013 Volume.36 No. 4 p.327 ~ p.335
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Clinical Application Analysis of 3D-CRT Methods Using Tomotherapy
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Cho Kang-Chul
Kim Joo-Ho
Kim Hun-Kyum
Ahn Seung-Kwon
Lee Sang-Kyu
Yoon Jong-Won
Cho Jung-Heui
Lee Jong-Seok
Yoo Beong-Gyu
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Abstract
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This study investigates the case of clinical application for TomoDirect 3D-CRT(TD-3D) and TomoHelical 3D-CRT(TH-3D) with evaluating dose distribution for clinical application in each case. Treatment plans were created for 8 patients who had 3 dimensional conformal radiation therapy using TD-3D and TH-3D mode. Each patients were treated for sarcoma, CSI(craniospinal irradiaion), breast, brain, pancreas, spine metastasis, SVC syndrome and esophagus. DVH(dose volume histogram) and isodose curve were used for comparison of each treatment modality. TD-3D shows better dose distribution over the irradiation field without junction effect because TD-3D was not influenced by target length for sarcoma and CSI case. In breast case, dosimetric results of CTV, the average value of D 99%, D 95% were $49.2{pm}0.4$ 수식 이미지 Gy, $49.9{pm}0.4$ 수식 이미지 Gy and V 105%, V 110% were 0%, respectively. TH-3D with the dosimetric block decreased dose of normal organ in brain, pancreas, spine metastasis case. SCV syndrome also effectively decreased dose of normal organ by using dose block to the critical organs(spinal cord <38 Gy). TH-3D combined with other treatment modalities was possible to boost irradiation and was total dose was reduced to spinal cord in esophagus case(spinal cord <45 Gy, lung V 20 <20%). 3D-CRT using Tomotherapy could overcomes some dosimetric limitations, when we faced Conventional Linac based CRT and shows clinically proper dose distribution. In conclusion, 3D-CRT using Tomotherapy will be one of the effective 3D-CRT techniques.
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KEYWORD
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Tomotherapy, 3D-CRT, Treatment planning, Dose distribution
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