Abstract
Respiratory-gated radiation therapy (RGRT) has been used to minimize the dose to normal tissue in lung-cancer radiotherapy. The present research aims to improve the regularity of respiration in RGRT by using a video-coached respiration guiding system. In the study, 16 patients with lung cancer were evaluated. The respiration signals of the patients were measured by using a realtime position management (RPM) respiratory gating system (Varian, USA), and the patients were trained using the video-coaching respiration guiding system. The patients performed free breathing and guided breathing, and the respiratory cycles were acquired for ~5 min. Then, Microsoft Excel 2010 software was used to calculate the mean and the standard deviation for each phase. The standard deviation was computed in order to analyze the improvement in the respiratory regularity with respect to the period and the displacement. The standard deviation of the guided breathing decreased to 48.8% in the inhale peak and 24.2% in the exhale peak compared with the values for the free breathing of patient 6. The standard deviation of the respiratory cycle was found to be decreased when using the respiratory guiding system. The respiratory regularity was significantly improved when using the video-coaching respiration guiding system. Therefore, the system is useful for improving the accuracy and the efficiency of RGRT.
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ICRU-62: Prescribing, Recording and Reporting Photon Beam Therapy (supplement to ICRU report 50): International Commission on Radiation Units and Measurements, Bethesda, MD, 1999.
G. A. Ezzell et al., Med. Phys. 36, 5359 (2009).
T. Depuydt, A. Van Esch and D. P. Huyskens, Radiother. Oncol. 62, 309 (2002).
S. A. Oh, M. K. Kang, S. K. Kim and J. W. Yea, Prog. Med. Phys. 24, 145 (2013).
S. K. Kim, M. K. Kang, J. W. Yea and S. A. Oh, J. Korean Phys. Soc. 63, 67 (2013).
S. B. Jiang, Med. Dosim. 31, 141 (2006).
K. I. Kauweloa, J. C. Park, A. Sandhu, T. Pawlicki, B. Song and W. Y. Song, Med. Phys. 24, 220 (2013).
E. S. Jang, S. M. Kang, C. S. Lee and S. S. Kang, Kor. Soc. Radiat. Ther. 22, 113 (2010).
J. S. Lee, I. C. Im, S. M. Kang, E. H. Goo and S. M. Baek, J. Korean Phys. Soc. 63, 2039 (2013).
S. H. Kang, D. S. Kim, T. H. Kim, T. S. Suh and J. W. Yoon, J. Korean Phys. Soc. 62, 159 (2013).
R. Muirhead, C. Featherstone, A. Duffton, K. Moore and S. McNee, Radiother. Oncol. 95, 172 (2010).
R. George, T. D. Chung, S. S. Vedam, V. Ramakrishnan, R. Mohan, E. Weiss and P. J. Keall, Int. J. Radiat. Oncol. Biol. Phys. 65, 924 (2006).
H. D. Kubo and B. C. Hill, Phys. Med. Biol. 41, 83 (1996).
S. Shimizu, H. Shirato, S. Ogura, H. Akita-Dosaka, K. Kitamura, T. Nishioka, K. Kagei, M. Nishimura and K. Miyasaka, Int. J. Radiat. Oncol. Biol. Phys. 51, 304 (2001).
H. Shirato et al., Int. J. Radiat. Oncol. Biol. Phys. 48, 435 (2000).
K. E. Rosenzweig et al., Int. J. Radiat. Oncol. Biol. Phys. 48, 81 (2000).
A. M. Berson, R. Emery, L. Rodriguez, G. M. Richards, T. Ng, S. Sanghavi and J. Barsa, Int. J. Radiat. Oncol. Biol. Phys. 60, 419 (2004).
J. Y. Woo et al., Kor. Soc. Radiat. Ther. 24, 157 (2012).
K. S. Park, J. H. Kim, H. K. Park, J. G. Beak, S. K. Lee, J.W. Yoon and J. H. Cho, Kor. Soc. Radiat. Ther. 25, 159 (2013).
S. Y. Park, J. H. Ahn, J. M. Suh, Y. I. Kim, J. M. Kim, B. K. Choi, H. R. Pyo and K. W. Song, Kor. Soc. Radiat. Ther. 24, 123 (2012).
P. J. Keall, V. R. Kini, S. S. Vedam and R. Mohan, Australas. Phys. Eng. Sci. Med. 25, 1 (2002).
S. Y. Ma, J. H. Choi, T. S. Jeung and S. W. Lim, Med. Phys. 24, 198 (2013).
S. H. Kang, J. W. Yoon, T. H. Kim and T. S. Suh, Kor. Soc. Med. Phys. 23, 1 (2012).
J. Y. Na, T. Y. Kang, G. M. Baek and G. T. Kwon, Kor Soc. Radiat. Ther. 25, 49 (2013).
M. J. Kim, I. C. Lim, J. S. Lee, and S. M. Kang, J. Kor. Soc. Radiol. 7, 157 (2013).
C. B. Saw, E. Brandner, R. Selvaraj, H. Chen, M. S. Huq and D. E. Heron, Biomed. Imaging Interv. J. 3, e40 (2007).
E. H. Shin et al., Kor. Soc. Med. Phys. 22, 107 (2011).
P. Giraud and A. Houle, Respiratory Gating for Radiotherapy: Main Technical Aspects and Clinical Benefits, ISRN Pulmonology (2013).
Y. H. Lee, J. H. Lee and S. H. Yoo, Kor. Soc. Radiol. Sci. 22, 135 (2010).
J. S. Kim, E. S. Shin, J. S. Shin, S. G. Ju, Y. Y. Han, H. C. Park and D. H. Choi, Kor. Soc. of Med. Phys. 21, 127 (2010).
J. Y. Song, B. S. Nah, W. K. Chung, S. J. Ahn, T. K. Nam and M. S. Yoon, Kor. Soc. Med. Phys. 17, 136 (2006).
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Lee, H.J., Yea, J.W. & Oh, S.A. Reductions in the variations of respiration signals for respiratory-gated radiotherapy when using the video-coaching respiration guiding system. Journal of the Korean Physical Society 67, 163–169 (2015). https://doi.org/10.3938/jkps.67.163
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DOI: https://doi.org/10.3938/jkps.67.163