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Abstract
In this study, we developed and evaluated the patient respiration training method which can help to avoid the problems for the limitation of RGRT applicable patient cases. By using the MEMS (micro-electro-mechanical-system) acceleration sensor, we measured movement of motion phantom. We had compared the response of MEMS with commercially introduced real time patient monitoring (RPM) system. We measured the response of the MEMS with 1 dimensional motion phantom movement for 2.5, 3.0, 3.5 second of period and the 2.0, 3.0, 4.0 cm of the amplitudes. The measured period error of the MEMS system was 0.6∼6.0% compared with measured period using RPM system. We found that the shape of MEMS signals were similar with RPM system. From this study, we found the possibility of MEMS as patient training system.
References
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Fig. 1.
MEMS acceleration sensor communication architecture (UM1017 User manual, STEVAL-MKI062V2 communication protocol).
Fig. 2.
Real MEMS signal displayed in the computer monitor (amplitude: 40 mm, velocity: 2.0 s/cycle).
Fig. 3.
(a) Gravity acquired using the MEMS acceleration sensor, (b) velocity reconstructed by using equation (1), (c) position reconstructed by using equation (2) (amplitude: 30 mm, velocity: 3.5 s/cycle).
Fig. 4.
The motion of the respiratory Gating Platform (RGP) was measured by using the RPM system, independently.
Fig. 6.
MEMS signal compared with RPM system. (a) 40 mm, 2.5 s/cycle MEMS signal (b) 40 mm, 2.5 s/cycle RPM system signal (c) 20 mm, 3.0 s/cycle MEMS signal (d) 20 mm, 3.0 s/cycle RPM system signal (e) 40 mm, 3.5 s/cycle MEMS signal (f) 40 mm, 3.5 s/cycle RPM system signal.
Table meas
e 1. Average sured with MEM cycle of 1D MS accelerati motion phanto ion sensor and om which was d their errors.
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