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KMID : 0364920100350020063
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Journal of Radiation Protection and Research
2010 Volume.35 No. 2 p.63 ~ p.68
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Target motion analysis of the respiratory gated guided radiotherapy in liver cancer patients using 4D-CT
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Dong Kyung-Rae
Park Byung-Soo
Kim Sae-Sark
Kweon Dae-Cheol
Goo Eun-Hoe
Chung Woon-Kwan
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Abstract
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The ultimate goal of radiation treatment is to use enough radiation dosage in order to examine a tumor while protecting normal tissue. Respiratory guided radiotherapy is being clinically implemented to examine a given stabilized area in order to compensate for the problems of patient breathing. This study investigates the effects of breathing movements on 40 patients with liver cancer through the actual radiation therapy plan using 4D-CT and respiratory guided radiotherapy using RPM. Using a commercial RPM respiratory gating system 4D-CT, we acquired 4D CT on multislice helical CT scanners that use different approaches to 4D CT image reconstruction. The results from analyzing forty patients according to age and direction showed no relationship between gender and transition change. The mean left-right, anteroposterior, and craniocaudal total movements were , , and mm, respectively. Changes were the largest with CC directions and as patients advanced in age, movements were larger. Therefore, as changes occur in treatment areas because of movements caused from breathing, respiratory gating system is put into operation to revise movement and can increase the radiotherapeutics effects in treating liver cancer.
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KEYWORD
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Respiratory guided radiotherapy, 4D-CT, RPM respiratory gating system, Liver cancer
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