期刊
PHYSIOLOGICAL MEASUREMENT
卷 31, 期 8, 页码 S111-S125出版社
IOP PUBLISHING LTD
DOI: 10.1088/0967-3334/31/8/S09
关键词
magnetic induction tomography; haemorrhagic cerebral stroke
资金
- EPSRC [EP/E009697/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E009697/1] Funding Source: researchfish
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 approximate to 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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