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KMID : 1038620150330030250
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Radiation Oncology Journal
2015 Volume.33 No. 3 p.250 ~ p.255
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Comparison between audio-only and audiovisual biofeedback for regulating patients' respiration during four-dimensional radiotherapy
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Yu Je-Sang
Choi Ji-Hoon
Ma Sun-Young
Jeung Tae-Sig
Lim Sang-wook
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Abstract
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Purpose: To compare audio-only biofeedback to conventional audiovisual biofeedback for regulating patients' respiration during four-dimensional radiotherapy, limiting damage to healthy surrounding tissues caused by organ movement.
Materials and Methods: Six healthy volunteers were assisted by audiovisual or audio-only biofeedback systems to regulate their respirations. Volunteers breathed through a mask developed for this study by following computer-generated guiding curves displayed on a screen, combined with instructional sounds. They then performed breathing following instructional sounds only. The guiding signals and the volunteers' respiratory signals were logged at 20 samples per second.
Results: The standard deviations between the guiding and respiratory curves for the audiovisual and audio-only biofeedback systems were 21.55% and 23.19%, respectively; the average correlation coefficients were 0.9778 and 0.9756, respectively. The regularities between audiovisual and audio-only biofeedback for six volunteers' respirations were same statistically from the paired t-test.
Conclusion: The difference between the audiovisual and audio-only biofeedback methods was not significant. Audio-only biofeedback has many advantages, as patients do not require a mask and can quickly adapt to this method in the clinic.
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KEYWORD
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Audio feedback, Respiratory regulation, Guided breath, Four dimensional radiotherapy
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