Development of a magnetic resonance-compatible galvanic skin response measurement system using optic signal.
The purpose of the current study is to develop a magnetic resonance (MR)-compatible galvanic skin response (GSR) measurement system that can measure the GSR signal during MR image acquisition. If GSR signals are measured simultaneously with the acquisition of MR images, there can be a mutual interference effect. The present system was designed to block noises caused by the main magnetic field, the gradient magnetic field, and the radio frequency (RF) pulse when MR images are acquired. To minimize the distortion of MR images, the GSR measurement system was shielded. Especially, this system used analog, not digital, elements in order to remove any possible effects on MR images. An RF-interference-free optical data link using the pulse-width modulation technique was adopted in order to transmit GSR signals measured inside the MR room. The experiment verified that a reliable GSR signal can be obtained without deteriorating the MR image. It is expected that this system can be used for diverse medical and neuroscience studies.
Lim
Dae-Woon
DW
Department of Information & Communication Engineering, Dongguk University, Seoul, South Korea.
Park
Jong-Rak
JR
Choi
Mi-Hyun
MH
Lee
Soo-Jeong
SJ
Choi
Jin-Seung
JS
Kim
Hyung-Sik
HS
Yi
Jeong-Han
JH
Tack
Gye-Rae
GR
Lee
Bongsoo
B
Chung
Soon-Cheol
SC
D003627:Data Interpretation, Statistical; D005712:Galvanic Skin Response / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000706:statistics & numerical data*; D012815:Signal Processing, Computer-Assisted