TY - GEN
T1 - The impact of audio-visual biofeedback with a patient-specific guiding waveform on respiratory motion management
T2 - World Congress on Medical Physics and Biomedical Engineering, 2015
AU - Nakajima, Y.
AU - Kadoya, N.
AU - Kida, S.
AU - Ito, K.
AU - Kanai, T.
AU - Kishi, K.
AU - Sato, K.
AU - Dobashi, S.
AU - Takeda, K.
AU - Matsushita, H.
AU - Jingu, K.
N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2015.
PY - 2015
Y1 - 2015
N2 - Irregular breathing can influence the outcome of four-dimensional computed tomography imaging for causing artifacts. Audio–visual biofeedback systems associated with patient-specific guiding waveform are known to reduce respiratory irregularities. In Japan, abdomen and chest motion selfcontrol devices (Abches), representing simpler visual coaching techniques without guiding waveform are used instead; however, no studies have compared these two systems to date. Here, we evaluate the effectiveness of respiratory coaching to reduce respiratory irregularities by comparing two respiratory management systems. We collected data from eleven healthy volunteers. Bar and wave models were used as audio–visual biofeedback systems. Abches consisted of a respiratory indicator indicating the end of each expiration and inspiration motion. Respiratory variations were quantified as root mean squared error (RMSE) of displacement and period of breathing cycles. All coaching techniques improved respiratory variation, compared to free-breathing. Displacement RMSEs were 1.43 ± 0.84, 1.22 ± 1.13, 1.21 ± 0.86, and 0.98 ± 0.47 mm for free-breathing, Abches, bar model, and wave model, respectively. Freebreathing and wave model differed significantly (p < 0.05). Period RMSEs were 0.48 ± 0.42, 0.33 ± 0.31, 0.23 ± 0.18, and 0.17 ± 0.05 s for free-breathing, Abches, bar model, and wave model, respectively. For variation in both displacement and period, wave model was superior to free-breathing, bar model, and Abches. The average reduction in displacement and period RMSE compared with wave model were 27% and 47%, respectively. The efficacy of audio–visual biofeedback to reduce respiratory irregularity compared with Abches. Our results showed that audio–visual biofeedback combined with a wave model can potentially provide clinical benefits in respiratory management, although all techniques could reduce respiratory irregularities.
AB - Irregular breathing can influence the outcome of four-dimensional computed tomography imaging for causing artifacts. Audio–visual biofeedback systems associated with patient-specific guiding waveform are known to reduce respiratory irregularities. In Japan, abdomen and chest motion selfcontrol devices (Abches), representing simpler visual coaching techniques without guiding waveform are used instead; however, no studies have compared these two systems to date. Here, we evaluate the effectiveness of respiratory coaching to reduce respiratory irregularities by comparing two respiratory management systems. We collected data from eleven healthy volunteers. Bar and wave models were used as audio–visual biofeedback systems. Abches consisted of a respiratory indicator indicating the end of each expiration and inspiration motion. Respiratory variations were quantified as root mean squared error (RMSE) of displacement and period of breathing cycles. All coaching techniques improved respiratory variation, compared to free-breathing. Displacement RMSEs were 1.43 ± 0.84, 1.22 ± 1.13, 1.21 ± 0.86, and 0.98 ± 0.47 mm for free-breathing, Abches, bar model, and wave model, respectively. Freebreathing and wave model differed significantly (p < 0.05). Period RMSEs were 0.48 ± 0.42, 0.33 ± 0.31, 0.23 ± 0.18, and 0.17 ± 0.05 s for free-breathing, Abches, bar model, and wave model, respectively. For variation in both displacement and period, wave model was superior to free-breathing, bar model, and Abches. The average reduction in displacement and period RMSE compared with wave model were 27% and 47%, respectively. The efficacy of audio–visual biofeedback to reduce respiratory irregularity compared with Abches. Our results showed that audio–visual biofeedback combined with a wave model can potentially provide clinical benefits in respiratory management, although all techniques could reduce respiratory irregularities.
KW - Audio–visual biofeedback
KW - Four-dimensional CT
KW - Radiotherapy
KW - Respiratory motion management
KW - Respiratory variation
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U2 - 10.1007/978-3-319-19387-8_144
DO - 10.1007/978-3-319-19387-8_144
M3 - Conference contribution
AN - SCOPUS:84944316781
SN - 9783319193878
T3 - IFMBE Proceedings
SP - 587
EP - 590
BT - World Congress on Medical Physics and Biomedical Engineering, 2015
A2 - Jaffray, David A.
PB - Springer Verlag
Y2 - 7 June 2015 through 12 June 2015
ER -