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The effect of respiratory motion on forward intensity modulated radiotherapy for breast cancer

Authors
 Taesoo Song  ;  Chang-Ok Suh  ;  Ikjae Lee  ;  Kyoungkeun Jeong  ;  Kichang Keum  ;  Chang Geol Lee  ;  Jinsil Seong  ;  Jae Ho Cho 
Citation
 TECHNOLOGY IN CANCER RESEARCH & TREATMENT, Vol.7(3) : 207-215, 2008 
Journal Title
 TECHNOLOGY IN CANCER RESEARCH & TREATMENT 
ISSN
 1533-0346 
Issue Date
2008
MeSH
Artifacts* ; Breast Neoplasms/radiotherapy* ; Female ; Humans ; Movement* ; Radiotherapy, Intensity-Modulated* ; Respiration*
Keywords
Breast cancer ; Forward IMRT ; Field-in-field technique ; Blurred dose distribution
Abstract
This study evaluated the effect of respiratory movement on field-in-field (FIF) forward intensity-modulated radiotherapy (IMRT) for the treatment of breast cancer. FIF forward IMRT was performed on ten patients receiving radiotherapy to the whole breast after conservation surgery. Assuming that breast motion follows a sophisticated cyclic function, the changes in hot and cold region, dose homogeneity index (DHI), and skin dose were examined at different respiration amplitudes of 1 cm, 2 cm, and 3 cm. FIF forward IMRT significantly improved the hot region, DHI, and skin dose, but slightly worsened the cold region, compared to the two wedged tangential technique (TWT). Interestingly, we found that the respiration amplitude affected the DHI and cold region but had no effect on the hot region and skin dose. The DHI was slightly improved at 1 cm of amplitude probably due to the blurring effect, remained unchanged at 2 cm of amplitude, and was worsened at 3 cm of amplitude. FIF forward IMRT significantly increased the cold region at 2 cm and 3 cm of respiration amplitude compared to the TWT. At 3 cm of respiration amplitude, an average cold region of 3.27 cm(3) was observed. In summary, our data indicate that during FIF forward IMRT, respiration movement has an important effect on various endpoints depending on the respiration amplitude of the patient
Full Text
http://www.tcrt.org/c3032/c4257/The-Effect-of-Respiratory-Motion-on-Forward-Intensity-Modulated-Radiotherapy-for-Breast-Cancer-p-207-216-p16605.html
DOI
10.1177/153303460800700306
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Keum, Ki Chang(금기창) ORCID logo https://orcid.org/0000-0003-4123-7998
Suh, Chang Ok(서창옥)
Seong, Jin Sil(성진실) ORCID logo https://orcid.org/0000-0003-1794-5951
Lee, Ik Jae(이익재) ORCID logo https://orcid.org/0000-0001-7165-3373
Lee, Chang Geol(이창걸) ORCID logo https://orcid.org/0000-0002-8702-881X
Jeong, Kyoung Keun(정경근)
Cho, Jae Ho(조재호) ORCID logo https://orcid.org/0000-0001-9966-5157
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/106911
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