MRI Magnetic Resonance Imaging

MRI Smart Amplifiers by BIOPAC

High-Quality Data for Human and Animal Protocols

BIOPAC offers a series of cables, electrodes, electrode leads, transducers, amplifiers, gating systems, and stimulus options for safe data acquisition of physiological signals in the MRI environment. Specially developed cables make it easy to interface between the control room and the chamber, and MR Safe and MR Conditional items are available. Electrodes and sensors are radiotranslucent and designed for use in the MRI. AcqKnowledge software includes automated data cleaning tools to further filter the data for high-quality results and easier analysis.

See also:

Please contact BIOPAC if you don’t find the support information you are looking for.

Safety Guidelines for Recording Biopotential Measurements in the MRI Environment

1. Place electrodes on the subject according to these guidelines:
A ) Prepare the subject’s skin surface with ELPAD to create a low contact source impedance at the electrode attachment site. Be careful to wipe away any excess electrode gel form the surface of the subject’s skin.

B) Attach the EL508 or EL509 electrodes as close to each other as possible, on the subject’s skin, for the measurement.

C) Place electrodes in as straight of a line as possible which is perpendicular to the magnet’s axis.

D) Place electrodes between 3-5 cm apart, if possible; the larger the area between the electrodes, the stronger the MRI gradient artifact.

2. Connect the electrode lead set to the electrodes according to these guidelines: A ) Make sure that the electrode leads do not loop in a “circle”, “S” or “U” shape. Also, do not twist or braid the electrode leads. Looped, braided or twisted leads pick up RF energy, resulting in current induction and increased localized heating.  

B ) Run the leads out of the chamber bore in the simplest (straightest) manner possible.

C)  Do not allow the electrode leads to touch the subject’s bare skin. Electrode leads may heat up in the MRI.
– Use a thermal insulator (such as a blanket or towel) between the electrode lead and the subject’s skin.
– It’s also possible to use thermally-insulating foam jacket, similar to those used for insulating copper tubing, for placing the electrode leads to keep them away from the subject’s skin.


Click a product below for more details. Or click here to search the rest of the site.

Accelerometer 5 G (uses 3 inputs) for MRI

Part #: TSD109C2-MRI

This Tri-Axial Accelerometer high level output transducer (±5 G) is optimal for measuring accelerations when performing slow movements, subtle gestures,…

reusable silver-silver chloride electrodes

Ag-AgCl Electrodes

Part #: EL254, EL254RT, EL254S, EL258, EL258H, EL258RT, EL258S

Silver-silver chloride (Ag-AgCl) electrodes provide accurate and clear transmission of surface biopotentials. EL250 series reusable lead electrodes are suitable for…

Tiered flow head

Air Flow Head – Tiered

Part #: RX117A-MRI

The RX117A-MRI is a sterilizable air flow head for use with BIOPAC pneumotachs—fits standard (TSD117, SS11LB) and -MRI (TSD117A-MRI) transducers. The…

MR Safe Liquid silicon mouthpiece

Airflow Mouthpiece Replacement for MRI

Part #: RX-AFT35-MOUTH

The RX-AFT35-MOUTH is a low profile liquid silicone mouthpiece replacement for the AFT35-MRI non-rebreathing T-valve assembly. The AFT35-MRI fits inside the head coil…

Airflow Subject Interface for MRI

Part #: AFT35-MRI

The AFT35-MRI is a low profile mouthpiece and non-rebreathing T-valve assembly specifically designed to fit inside an fMRI head coil.*…

Cardio Respiratory Gating System – ECG


Complete Dual-Channel Gating Systems These gate systems provide the cardiac trigger via an MRI Smart Electrocardiogram Amplifier (ECG100C-MRI) and include an…

Digital Trigger Unit for MRI Gating

Part #: DTU100

Use the DTU100 Digital Trigger Unit to trigger an MRI system with the occurrence of the R-wave present in human…

Disp. Radiotranslucent Electrode, 100/pk

Disp. Radiotranslucent Electrode, 100/pk

Part #: EL508

These disposable, radiotranslucent, pre-gelled electrodes have a circular contact on latex-free, vinyl tape backing. Use with LEAD108B or LEAD108C RT leads.…

Disp. RT Dry Electrode, 100/pk

Part #: EL509

These disposable dry electrodes have a very long shelf-life and are ideal for EDA/GSR applications. EL509 electrodes are radiotranslucent and have circular…

Disposable RT Electrodes – 3/set (pk of 20 sets)

Part #: EL510

EL510 is a disposable, Ag-AgCl , radio-translucent set of three electrodes with hydrogel centers and hydrocolloid ends. Pre-wired Micro-lead cables:…

ECG Electrocardiogram Amplifier for MRI

Part #: ECG100C-MRI

The ECG100C-MRI Electrocardiogram Amplifier records electrical activity generated by the heart and will reliably record ECG from humans, animals and…

EDA Electrodermal Activity Amplifier for MRI

Part #: EDA100C-MRI

MRI Smart Amplifier The EDA100C-MRI measures both the skin conductance level (SCL) and skin conductance response (SCR) as they vary…

isotonic gel for skin conductance recordings

Electrode Gel, Isotonic, 114 g

Part #: GEL101

GEL101 electrode paste is specially formulated with 0.5% saline added to a neutral base to create an isotonic, 0.05 molar…

Electroencephalogram EEG Amplifier for MRI

Part #: EEG100C-MRI

MRI Smart Amplifier The EEG100C-MRI Electroencephalogram (EEG) Amplifier amplifies bioelectric potentials associated with neuronal activity of the brain and can…

EMG Electromyogram Amplifier for MRI

Part #: EMG100C-MRI

MRI Smart Amplifier The EMG100C-MRI Electromyogram Amplifier amplifies general and skeletal muscle electrical activity. The amplifier functions directly with AcqKnowledge to…