6 October 2017 Assessment of tunneling magnetoresistors for magnetic imaging tomography
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Imaging of potential threat objects within shielded containers can be difficult, such as x-ray through dense metals e.g. Pb. Magnetic imaging tomography (MIT) offers a method by which imaging is performed on the basis of electrical conductivity and magnetic permeability rather than density. MIT has been used widely in the non-destructive evaluation (NDE) field to detect flaws and defects in solid objects, usually using inductance coils to generate and detect the magnetic field. Here, we use a tunneling magnetic resistor (TMR) to detect a field generated by a drive coil and use this data to image objects of interest within shielded enclosures.
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Abigail Langley, Rob Ward, Max Joseph, Joseph Watson, "Assessment of tunneling magnetoresistors for magnetic imaging tomography", Proc. SPIE 10438, Emerging Imaging and Sensing Technologies for Security and Defence II, 104380E (6 October 2017); doi: 10.1117/12.2278882; https://doi.org/10.1117/12.2278882

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