BIOPAC® Systems, Inc. Logo

EDA / SCR offset calibration for MRI

In some MRI installations, there may be an offset in EDA measurements. The following steps can be performed in order to calibrate skin conductance measurements:

Install all cabling and place the EDA leads in the scanner, where they will be once the participant is there. The connection should be as follows: EDA leads->MRI cabling in chamber room to filter->Filter->MRI cabling from filter in control room->GSR100C amplifier.

The procedure involves performing a 2-point calibration with 2 known conductance values. You can record the voltage corresponding to conductance 0 (open leads) and conductance 10uMho (via placing a 100kOhm resistor between the leads) to calibrate the GSR100C amplifier. The GSR amplifier must be in DC mode (both high-pass filter switches should be set to DC). The following steps will guide you through the procedure.

The amplifier will be calibrated for measurements in the scanner.
IMPORTANT! See Safety Guidelines for recording  biopotential measurements in the MRI environment.

Associated Applications

Spotlight On
BIOPAC training

T4 Human Physiology Conference Day Passes

Day Passes T4: Tools, Trends, Techniques, and Technology Monday, July 24, 2017 – Wednesday, July 26, 2017 Join BIOPAC for hands-on, small-group human physiology workshops, presented by renowned experts, on the beautiful University of California at Santa Barbara campus in Santa Barbara, California, USA. Who should attend Anyone who records and analyzes human physiology data […]

View All
Latest News

Mobita Advances Prestimulus EEG Research

The Mobita 32-Channel EEG recording system was used in research examining if physiological data can be used to predict truly random events that correspond to perceptual stimuli. Baumgart, et al. from the University of California Santa Barbara utilized a quantum random number generator (qRNG) to choose from three randomized conditions: light, sound, and no stimulus. […]

News Citations—Respiration and Cardiovascular Activity

BIOPAC provides software and hardware that allow for research teams to record and analyze respiration activity in physiological experimentation. Here are a few notable studies in monitoring respiration and cardiovascular activity. The coupling between peripheral microcirculation and slow breathing: The purpose of this study was to investigate the coupling of breathing movements and microcirculatory blood […]

Read All
Request a Demonstration
Request a Demonstration