Development of high accurate monitoring system for human brain by the optical CT method

脑肿瘤和脑梗塞在直径小于1cm的情况下比较容易进行手术，因此检查结果非常重要。然后，为了研究光强的检测极限条件，改变病变零件的直径大小，并采用数值模拟的方法研究了检测光强的影响。分析模型是一个直径为100mm的球体，假设皮肤、头骨、白质和疾病部分，通过改变吸收系数来模拟每个部分。由于在直径为6毫米或更大的溶液中检测到的光学强度没有变化，并且在疾病和健康时的光学强度的差异在分析结果中完全显示出来，因此认为有可能发现疾病部分。接下来，为了研究光强与疾病部位位置的关系，利用上述方法在光源和检测器的直线上以等间隔布置了五个疾病部位。在光源附近的点上，检测到的光强在健康时和疾病时没有差别，没有指定疾病部分的存在。然而，通过旋转物体或光源180度的位置，认为可以检查疾病部位的存在。上述结果表明，通过旋转被测物体，即使疾病部位在哪个位置，光学ct也可以检测到大脑内1cm或更小的疾病存在。由于使用这种方法实现了不使用x射线的安全医疗检查，这表明疾病预防是可能的。

Since a brain tumor and cerebral infarction are comparatively easy to undergo an operation in the case that the diameter is less than 1cm, findings of them are very important. Then, in order to investigate the detection limited condition of the optical intensity, the size of diameters of a disease part was changed and the influence of the optical intensity detected was investigated by using numerical simulation. An analysis model is a sphere with a diameter of 100mm, and imitated each portion by changing an absorption coefficient supposing the skin, a skull, white matter, and the disease part. Since there is no variation in a solution in the optical intensity detected for the diameter of 6mm or more and the difference fully appeared in the optical intensity at the time of a disease and health as a result of analysis, it is thought that discovery of a disease part is possible. Next, in order to investigate the relation of optical intensity to the position of a disease part, five disease parts have been arranged at equal intervals on the straight line of a light source and a detector using the above-mentioned. At the point near a light source, the detected optical intensity does not have a difference at the time of health and a disease, and has not specified existence of a disease part. However, it is considered by rotating 180 degrees the position of an object or a light source that existence of a disease part can be checked the above result that the existence of the disease within a brain 1cm or less can be detected by Optical-CT by rotating a subject object even if a disease part is in which positions. Since the safe medical checkup that does not use X-rays by using this method was attained, it was shown that sick prevention is possible.