Magnetocardiography (MCG) Science

Magnetocardiography (MCG) is a technique to measure the magnetic fields produced by electrical activity in the heart. MCG systems make no contact with the surface of the human body and emit no radiation. A functional image of the heart’s electromagnetic activity can be generated using MCG. 

40 Years of Investigation

Magnetocardiography has been studied extensively for over 40 years. Historically, the magnetic signals were recorded through the use of highly sensitive magnetic sensors called Superconducting Quantum Interference Devices (SQUIDs). These systems would typically require special magnetically shielded rooms and liquid helium cooling for optimal results. The difficulties and expenses associated with implementing an MCG system have severely limited the number of applications in use today. CardioFlux has overcome these barriers of the past, and is poised to be easily integrated into clinical workflows

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Electric signals traditionally measured through the electrocardiogram (ECG) are influenced by the various conductivities of body tissues and skin before they can be recorded. Therefore, the differences in the electric potentials that are recorded by the ECG are directly dependent on the inhomogeneity and geometry of the thorax.


 Magnetic signals however, travel through the body with almost no disturbance. These signals travel through the thorax, which is essentially treated as a transparent volume conductor.  The magnetic signals are vector-based measurements, unlike an ECG’s scalar measurements. This signifies that the magnetic signal can provide clinically useful information that may allow an advanced, more accurate cardiac diagnosis. 

Clinical Applications of MCG

Magnetocardiography can detect the onset of cardiovascular disease in a very early stage with high accuracy for both acute and asymptomatic patients. Below are four areas MCG has been and continues to be studied:

  • Early detection of Arrhythmia; Ischemia, Angina pectoris¹
  • Direct diagnosis of heart function after myocardial infarction (MI) and surgery of heart transplantation.²
  • On-going monitoring of patients with heart surgical intervention: Patients with a stent or who underwent a balloon dilatation; post bypass patients; post heart transplantation patients.³
  • Detect the cardiac signal of an unborn child starting from the 16th week of pregnancy.⁴

Our MCG Solutions

CardioFlux Magnetocardiograph™

CardioFlux Magnetocardiograph (MCG) is a FDA Cleared, non-invasive biomagnetic imaging system that requires no exercise or patient exposure to radiation. Leveraging over forty years of clinical investigation, CardioFlux MCG is intended for use as a tool to measure and display the magnetic signals produced by your heart.

Faraday Analytical Cloud™

CardioFlux MCG is powered by Faraday Analytical Cloud, the software that generates images of the patient’s magnetic field. Physicians can order scans and have the results within minutes through integrating Faraday with a hospital’s clinical and administrative systems.