Electrical Impedance Tomography for Medical Imaging

存在许多现有的医学成像技术，包括 X射线计算机断层扫描（CT），磁共振成像（MRI）， 超声成像、放射性同位素成像和热成像。 每种都有自己的优势，适合不同的应用。 电阻抗断层成像（EIT）图像电阻率。 它 测量电流和电压以确定对象的阻抗 分布 由于不同器官的电阻率不同， 技术然后识别差异并将产生图像。 EIT有几个优点，它们包括：对电离辐射安全， 便宜的仪器和便携性。 已经开发了用于EIT的系统，包括16电极物理成像仪。 体模，数据采集系统与PC接口， 重建软件和彩色显示设备。 此操作 提供新的支持，以： 来自物理体模的错误，开发容错重建 算法，可以最佳地重建图像形式的测量误差- 污染的真实的数据，确定图像空间分辨率， 对于人体的典型阻抗分布， 体，将二维重建方法扩展到三维重建方法， 量纲法 两位PI都是经验研究者， 机构支持是足够的，我建议支持。

There are many existing medical imaging techniques, including x-ray computerized tomography (CT), magnetic resonance imaging (MRI), ultrasonic imaging, radioisotope imaging, and thermographic imaging. Each has its own advantages and are suitable for different applications. Electrical impedance tomography (EIT) images electrical resistivity. It measures currents and voltages to determine the object's impedance distribution. Since different organs have different resistivity, this technique then recognizes the differences and will produce an image. EIT has several advantages, they include: safe from ionizing radiation, inexpensive instrumentation, and portability. A system has been developed for EIT, including a 16-electrode physical phantom, a data acquisition a system interfaced with a PC, reconstruction software, and color display facilities. This action provides for renewed support to: determine the sources of measurement error from a physical phantom, develop an error-tolerant reconstruction algorithm that can optimally reconstruct the image form measured error- contaminated real data, determine the image spatial resolution that can be practically achieved for typical impedance distribution of the human body, expand the two-dimensional reconstruction method to a three- dimensional method. Both of the PI's are experiences researchers and the institutional support is adequate, I recommend support.