Research on Simulated CT Equipment for Radiological Technologists Education using Laser Beam

由于x射线CT检查是卫生诊所的主要检查程序之一，因此在培训医疗放射技术人员的教育机构中，实际的x射线CT设备用于测试和培训。然而，现实生活中的x射线CT设备体积庞大，内部结构复杂，因此测试和培训课程对于帮助学生理解设备的电气和图像分析原理是有限的，并且还需要考虑x射线暴露的危险。出于这个原因，人们需要一种更简单的教育设备来实现这些目标。2006年，我们通过简化检测透射光的方法，使设备变得更小，并为教育目的创建了一个更简单的模拟CT设备的新原型，使我们能够同时使用几个这样的设备。我们减小了系统的尺寸，并通过使用袖珍电脑来控制步进电机并收集传输光强度数据，从而缩短了数据收集时间。我们认为这个简单的系统可以用于入门课程，帮助学生了解x射线CT设备的结构和图像处理。2007年，我们明确了光学外差干涉测量中直线光分量的方向性和选择性，以及旋转阶段的扫描间隔与模拟CT图像上伪影的关系。我们还在高度方向上重建了截面图像，形成了三维图像。此外，我们还澄清了模拟CT图像上幻影容器表面纹理与伪影之间的关系。

Since X-ray CT examination is one of the leading procedures in health clinics,actual X-ray CT equipments are used for testing and training in educational institutions that train medical radiological technicians. However,a real-life X-ray CT equipment is large and has a complicated internal structure,so the testing and training curriculum is limited for helping students comprehend the electrical and image analysis principles of the equipment,and it is also necessary to consider the dangers of exposure to X-rays. For that reason,there is demand for a simpler educational equipment that achieves such objectives.In 2006,we made the equipment smaller by simplifying the method of detecting transmitted light,and created a new prototype of a simpler simulated CT equipment for educational purposes that enables simultaneous us by several such equipments.We reduced the size of the system and enabled shorter data collection times by using a pocket computer to control the stepper motor and collect transmitted light strength data.We consider that this simple system is useful for application in introductory courses,to help students understand the structure and image processing of an X-ray CT equipments.In 2007,we clarified the directionality and selectivity of the rectilinear light component in optical heterodyne interferometry and the relationship between the scan interval of the rotational stage and artifacts on the simulated CT image.We also reconstructed sectional images in the heightwise direction to create a three-dimensional image. In addition,we clarified the relationship between the surface texture of the phantom container and artifacts on the simulated CT image.