Development of a magnetic-resonance-compatible photoplethysmograph amplifier for behavioral and emotional studies

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The purpose of the present study was to develop a magnetic resonance (MR) compatible photoplethysmograph (PPG) system that can measure the raw PPG signal during MR image acquisition. The system consists of an optic sensor that measures the optic signal, an optic cable that transmits a near-infrared optic signal, a signal amplifier, and a filter for noise removal. To minimize interactive noise, only the optic cable and the optic sensor module are located inside the MR room; the signal amplifier and filter are located outside the MR room. An experiment verified that a reliable PPG signal can be obtained without causing a deterioration in the MR image.


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Correspondence to Gye-Rae Tack.

Additional information

This research was supported by Grant R11-2002-103 from the Korea Science and Engineering Foundation and Grant 02-PJ3-PG6-EV07-0002 from the Korea Health 21 R&D Project, Ministry of Health and Welfare, Republic of Korea.

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Chung, S., Kwon, J., Lee, B. et al. Development of a magnetic-resonance-compatible photoplethysmograph amplifier for behavioral and emotional studies. Behav Res 40, 342–346 (2008) doi:10.3758/BRM.40.1.342

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  • Obstructive Sleep Apnea
  • Obstructive Sleep Apnea Syndrome
  • Optic Sensor
  • Noise Removal
  • Contingent Negative Variation