Reconstruction artefacts in magnetic induction tomography due to patient's movement during data acquisition.

摘要: Magnetic induction tomography (MIT) attempts to obtain the distribution of passive electrical properties inside body. Eddy currents are induced in body using an array transmitter coils and magnetic fields these measured by receiver coils. In clinical usage, relative position can change during data acquisition because expected/unexpected movements patient. Especially respiration monitoring will inevitably cause artefacts reconstructed images. this paper, effect was investigated for both state frequency differential variants MIT. It found that a slight shift transverse plane causes spurious perturbations on surface. reconstructions, artefact surface propagates towards centre oscillatory manner. observed movement corrupt all valuable information MIT, while MIT seems more robust against effects. A filtering strategy is offered order decrease To end, patient's required.