PPG signal acquisition and analysis on in vitro tooth model for dental pulp vitality assessment
نویسندگان
چکیده
Investigations into different methods of low-noise signal detection in photoplethysmography (PPG) intended for pulp vitality assessment have shown that the resulting signals must be amplified and filtered prior to digital signal processing. The purpose of this research is the development of a portable in vitro device with integrated computer for the recording, investigation and historical comparison of PPG signals. An accompanying digital filter program, capable of being operated by non-technical personnel has been developed using LabVIEW-software. The complete measurement system has been tested on an existing dental model. The new low-noise measurement system utilizing an OPT101 sensor yields signal amplitudes up to 35 times higher than that of previous measurement systems. Furthermore, the versatility of the software allows changes and customization to appropriate applications.
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