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http://dx.doi.org/10.3857/jkstro.2008.26.3.181

Efficacy of a Respiratory Training System on the Regularity of Breathing  

Shin, Eun-Hyuk (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Park, Hee-Chul (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Han, Young-YIh (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Ju, Sang-Gyu (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Shin, Jung-Suk (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Ahn, Yong-Chan (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
Publication Information
Radiation Oncology Journal / v.26, no.3, 2008 , pp. 181-188 More about this Journal
Abstract
Purpose: In order to enhance the efficiency of respiratory gated 4-dimensional radiation therapy for more regular and stable respiratory period and amplitude, a respiration training system was designed, and its efficacy was evaluated. Materials and Methods: The experiment was designed to measure the difference in respiration regularity following the use of a training system. A total of 11 subjects (9 volunteers and 2 patients) were included in the experiments. Three different breathing signals, including free breathing (free-breathing), guided breathing that followed training software (guided-breathing), and free breathing after the guided-breathing (post guided-breathing), were consecutively recorded in each subject. The peak-to-peak (PTP) period of the breathing signal, standard deviation (SD), peak-amplitude and its SD, area of the one cycle of the breathing wave form, and its root mean square (RMS) were measured and computed. Results: The temporal regularity was significantly improved in guided-breathing since the SD of breathing period reduced (free-breathing 0.568 vs guided-breathing 0.344, p=0.0013). The SD of the breathing period representing the post guided-breathing was also reduced, but the difference was not statistically significant (free-breathing 0.568 vs. guided-breathing 0.512, p=ns). Also the SD of measured amplitude was reduced in guided-breathing (free-breathing 1.317 vs. guided-breathing 1.068, p=0.187), although not significant. This indicated that the tidal volume for each breath was kept more even in guided-breathing compared to free-breathing. There was no change in breathing pattern between free-breathing and guided-breathing. The average area of breathing wave form and its RMS in postguided-breathing, however, was reduced by 7% and 5.9%, respectively. Conclusion: The guided-breathing was more stable and regular than the other forms of breathing data. Therefore, the developed respiratory training system was effective in improving the temporal regularity and maintaining a more even tidal volume.
Keywords
4-dimensional radiation therapy; Respiratory gating radiation therapy; Breathing cycle;
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1 Ali I, Lovelock D, Kang H, et al. Extraction of internal and external marker 3D-motion in liver patients with compression belt using kv cone-beam radiographic projections. Med Phys 2007;34:2392
2 Song JY, Nah BS, Jung WK, Ahn SJ, Nam TK, Yun MS. Development of error analysis program for phase-based respiratory gating radiation therapy. Korean J Med Physics 2006;17:136-143
3 Ramsey CR, Scaperoth D, Arwood D, et al. Clinical efficacy of respiratory gated conformal radiation therapy. Med Dosim 1999;24:115-119   DOI   ScienceOn
4 Pan T, Lee TY, Rietzel E, Chen GTY. 4D-CT imaging of a volume influenced by respiratory motion on multi-slice CT. Med Phys 2004;31:333-340   DOI   ScienceOn
5 Kubo HD, Hill BC. Respiration gated radiation treatment: a technical study. Phys Med Biol 1996;41:83-91   DOI   ScienceOn
6 Wong JW, Sharpe MB, Jaffray DA, et al. The use of active breathing control (ABC) to reduce margin for breathing motion. Int J Radiat Oncol Biol Physics 1999;44:911-919   DOI   ScienceOn
7 Venkat RB, Keall P, Sawant A, George R. Respiratory training using audio visual bio-feedback. Med Phys 2007;34:2370
8 Keall PJ, Mageras GS, Balter JM, et al. The management of respiratory motion in radiation oncology report of AAPM TG 76. Med Phys 2006;33:3874-3900   DOI   ScienceOn
9 Vedam SS, Keall PJ, Kini V, Mohan R. Determining parameters for respiratory-gating radiotherapy. Med Phys 2001;28:2139-2146   DOI   ScienceOn
10 Hanley J, Debois NM, Mah D, et al. Deep inspiration breathing technique for lung tumors: the potential value of target immobilization and reduced lung density in dose escalation. Int J Radiat Oncol Biol Physics 1999;45:603-611   DOI   ScienceOn
11 Lim S, Park S, Ahn SD, et al. Guiding curve based on the normal breathing as monitored by thermocouple for regular breathing. Med Phys 2007;34:4514-4518   DOI   ScienceOn
12 Sonke JJ, Zijp L, Remeijer P, Marcel van Herk. Respiratory correlated cone beam CT. Med Phys 2005;32:1176-1186   DOI   ScienceOn
13 Park HC, Cho BC, Kim SS, Oh DH, Bae H. Clinical considerations for respiration synchronized high-precision radiotherapy. Korean J Med Physics 2005;Supple 1:16-21
14 Zhang T, Keller H, O'Brien MJ, Mackie TR, Paliwal B. Application of the spirometer in respiratory gated radiotherapy. Med Phys 2003;30:3165-3172   DOI   ScienceOn
15 Gierga DP, Brewer J, Sharp GC, Betke M, Willett CG, Chen TY. The correlation between internal markers for abdominal tumors: implications for respiratory gating. Int J Radiat Oncol Biol Physics 2005;61:1551-1558   DOI   ScienceOn
16 Gierga DP, Brewer J, Shap GC. The correlation between internal markers for abdominal tumors: implications for respiratory gating. Int J Radiat Oncol Biol Physics 2005;61:1551-1558   DOI   ScienceOn