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KMID : 1038720130240030135
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Progress in Medical Physics
2013 Volume.24 No. 3 p.135 ~ p.139
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The Effect of Breathing Biofeedback on Breathing Reproducibility and Patient’s Dose in Respiration-gated Radiotherapy
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An So-hyun
Yeo In-hwan
Jung Jae-Won
Suh Hyun-Suk
Lee Kyung-Ja
Choi Jin-Ho
Lee Kyu-Chan
Lee Re-Na
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Abstract
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We evaluated the effect of two kinds of breathing biofeedback technique such as audio-instruction and audio-visual biofeedback on breathing reproducibility and the CTV coverage during repeated treatment regimes in respiration-gated radiotherapy. In this study, the breathing data of nineteen lung cancer patients acquired from Medical College of Virginia (MCV) during five weeks were used. The dose evaluation algorithm was programmed in MATLAB. In the result, the CTV coverage was decreased as 30.0% due to the breathing irreproducibility for free-breathing. For audio-visual biofeedback, the CTV coverage was improved as 20.0% because patients can learn how control their breathing stably. And the audio-instruction was effective to preserve the breathing reproducibility.
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KEYWORD
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Respiration-gated radiotherapy, Breathing reproducibility, Breathing biofeedback technique
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