A multicenter observational data development registry collecting diagnostic measures via standard of care (SOC) cardiac PET in order gain a better understanding of how CardioFlux MCG may be used in the detection of coronary ischemia.

Inclusion Criteria:

• Willing to provide informed consent
• Male or female, aged 40 and up (inclusive) at the time of enrollment
• Clinical suspicion of myocardial ischemia that clinician desired cardiac PET
• Completed cardiac PET within 2 weeks prior to study enrollment

Exclusion Criteria:

• Patients unable to fit into CardioFlux device.
• Patients unable to lie supine for 5 minutes.
• Patients with implanted ferromagnetic objects above the costal margin of the rib cage (implanted pacemakers, cardioverter/defibrillators, infusion pumps, and/or neuro stimulators). NOTE: Sternotomy wires stents are acceptable
• Ongoing atrial fibrillation or atrial flutter
• Life expectancy <1 yrs. due to non-cardiovascular comorbidity

Men and women age 40 and up with suspected or confirmed coronary ischemia who are scheduled to undergo diagnostic cardiac PET, for non-emergent diagnostic purposes at an enrolling clinical trial center.