Journal List > Prog Med Phys > v.25(4) > 1098452

Hwang, Park, Park, Cho, Lee, Jung, Ji, and Kwon: Development and Utility Evaluation of Portable Respiration Training Device for Image-guided Stereotactic Body Radiation Therapy (SBRT)

Abstract

This study developed a portable respiratory training device to improve breathing stability, which is an important element in using the CyberKnife Synchrony respiratory tracking device, one of the typical Stereotactic Radiation Therapy (SRT) devices. It produced an interface for users to be able to select one of two displays, a graph type and a bar type, supported an auditory system that helps them expect next respiration by improving a sense of rhythm of their respiratory period, and provided comfortable respiratory inducement. By targeting 5 applicants and applying individual respiratory period detected through a self-developed program, it acquired signal data of ‘guide respiration' that induces breathing through signal data gained from ‘free respiration' and an auditory system, and evaluated the usability by comparing deviation average values of respiratory period and respiratory amplitude. It could be identified that respiratory period decreased 55.74±0.14% compared to free respiration, and respiratory amplitude decreased 28.12±0.10% compared to free respiration, which confirmed the consistency and stability of respiratory. SBRT, developed based on these results, using the portable respiratory training device, for liver cancer or lung cancer, is evaluated to be able to help reduce delayed treatment time due to respiratory instability and improve treatment accuracy, and if it could be applied to developing respiratory training applications targeting an android-based portable device in the future, even use convenience and economic efficiency are expected.

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Fig. 1.
Respiratory signal acquisition using the belt system.
pmp-25-264f1.tif
Fig. 2.
A portable respiratory training device using window-based 8 inch Touch Smart Pad. (a) graph type (b) bar type.
pmp-25-264f2.tif
Fig. 3.
A diagram of the respiratory signal detection and analysis program using LabVIEW 2012.
pmp-25-264f3.tif
Fig. 4.
Respiratory period deviation average values of free respiration and guide respiration.
pmp-25-264f4.tif
Fig. 5.
Respiratory amplitude deviation average values of free respiration and guide respiration.
pmp-25-264f5.tif
Table 1.
The ave for each applican erage of devia nt in free and ation in perio d guided resp d and amplitude iration.
Average of deviation Free respiration Guided respiration Difference (%)
Period (sec) 0.357 0.158 −55.74±0.14
Amplitude (V) 0.313 0.225 −28.12±0.10
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