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Photo Plethysmogram Amplifier for MRI

Selectable signal conditioning—filter or transform data as it is being collected

Cascade up to 16 amplifer modules per MP Research System for multi-parameter or multi-subject studies

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Pulse Plethysmogram MRI-Amplifier
Part #: PPG100C-MRI

MRI Smart Amplifier

The PPG100C-MRI Photo Plethysmogram amplifier operates with the MECMRI-TRANS MRI cable/filter set and the TSD200-MRI photoplethysmogram (PPG) transducer to record the to record the Blood Volume Pulse (BVP) waveform via optical (photoplethysmogram) methods. The MRI Smart PPG amplifier incorporates signal processing circuitry which removes spurious MRI artifact from the source physiological data. In every aspect, data recording is easier and the final results are cleaner when using the MRI Smart Amplifiers to record physiological data in the fMRI or MRI.

Features

  1. Less sensitivity to electrode and transducer lead placement
  2. Improved gain selectability
  3. No missing spectra in physiological signal frequency band
  4. Minimizes computer-based real-time or post-processing signal processing
  5. Cleaner data available as real-time analog output

The PPG100C-MRI is part of a complete research system, interfacing with the MP160/MP150 data acquisition and analysis platform and AcqKnowledge software, allowing advanced analysis for multiple applications and supporting acquisition of a broad range of signals and measurements.

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MODULAR CONSTRUCTION

Amplifiers snap together for easy system configuration and re-configuration.

Intuitive, Elegant AcqKnowledge Software

Powerful automated analysis. Instantly & easily view, measure, analyze, transform, and report data.

Powerful MP160 Data Acquisition and Analysis System

Flexible, proven modular data acquisition and analysis system for life science research.

MRI Smart Amplifiers
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Part #: PPG100C-MRI
Categories: Amplifiers - Research, MRI Magnetic Resonance Imaging - Research
Subcategories: Amplifier Modules - Research

Equivalents
With a different Platform

Details

Compatibility


MRI Use: Conditional to 7T

Condition: PPG100C-MRI Amplifier stays in the Control Room and is used with the MEMRI-TRANS filtered cable set and recommended MR leads/electrodes/transducers; tested to 7T.

PPG100C-MRI front panel controls allow selection of either absolute or relative plethysmographic measurements. Signal processors are able to distinguish between physiological signal and MRI artifact as manifested by gradient switching during MRI sequences, such as Shim or EPI.

Because MRI-related transient artifact is removed at the source, the MRI version amplifier can be sampled at the same rate as during normal (non-MRI) physiological recording. There is no longer any requirement to over-sample the amplifier output to capture every nuance of MRI artifact to train secondary computer-based processing steps to remove such artifact.

Use with the TSD200-MRI transducer (matched infrared emitter and photo diode detector), which transmits changes in infrared reflectance resulting from varying blood flow. Blood is highly reflective of near infrared light wavelengths, due to the heme subunit of hemoglobin. When the PPG transducer is placed on the skin, in proximity to capillaries, the reflectance of the infrared light from the emitter to the detector will change in accordance to capillary blood volume. The PPG waveform peaks when capillary blood volume is maximized.

IMPORTANT! See Safety Guidelines for recording biopotential measurements in the MRI environment.

Support

Downloads/Resources

Knowledge Base

Manual

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