由各向同性层构建的可控各向异性电导率或扩散体模。
A controllably anisotropic conductivity or diffusion phantom constructed from isotropic layers.
机构信息
J. Crayton Pruitt Department of Biomedical Engineering, University of Florida, Gainesville, USA.
出版信息
Ann Biomed Eng. 2009 Dec;37(12):2522-31. doi: 10.1007/s10439-009-9799-6. Epub 2009 Sep 16.
Abstract
Phantoms with controllable and well-defined anisotropy are needed to test methods for imaging electrical anisotropy. We developed and tested a phantom that had properties similar to a homogeneous anisotropic conductive medium. The phantom was constructed with alternate slices of isotropic gel having different conductivities. The degree of anisotropy in the phantom could be varied easily by changing the relative conductivity of the two gels. We tested the stability of several phantoms and found their properties were maintained for approximately 8 h following construction. The phantom has application to electrical impedance tomography, magnetic resonance electrical impedance tomography, EEG and ECG source imaging and diffusion tensor imaging.
摘要
需要具有可控且明确各向异性的体模来测试用于成像各向异性的方法。我们开发并测试了一种类似于各向同性、具有各向异性的导电流体的体模。该体模由具有不同电导率的各向同性凝胶交替切片组成。通过改变两种凝胶的相对电导率，可以很容易地改变体模的各向异性程度。我们测试了几个体模的稳定性，发现它们的性能在构建后大约 8 小时内保持稳定。该体模可应用于电阻抗断层成像、磁共振电阻抗断层成像、脑电图和心电图源成像以及扩散张量成像。
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