Frequency-difference MIT imaging of cerebral haemorrhage with a hemispherical coil array: numerical modelling

Physiological Measurement
M ZolgharniP D Ledger

Abstract

The feasibility of detecting a cerebral haemorrhage with a hemispherical MIT coil array consisting of 56 exciter/sensor coils of 10 mm radius and operating at 1 and 10 MHz was investigated. A finite difference method combined with an anatomically realistic head model comprising 12 tissue types was used to simulate the strokes. Frequency-difference images were reconstructed from the modelled data with different levels of the added phase noise and two types of a priori boundary errors: a displacement of the head and a size scaling error. The results revealed that a noise level of 3 m degrees (standard deviation) was adequate for obtaining good visualization of a peripheral stroke (volume approximately 49 ml). The simulations further showed that the displacement error had to be within 3-4 mm and the scaling error within 3-4% so as not to cause unacceptably large artefacts on the images.

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Citations

Apr 5, 2016·Scientific Reports·Luca Marmugi, Ferruccio Renzoni
Dec 10, 2014·Optics Letters·Arne WickenbrockFerruccio Renzoni
May 25, 2021·Frontiers in Neuroscience·Yi Lv, Haijun Luo

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