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

由于脑肿瘤和脑梗塞在直径小于1cm的情况下相对容易进行手术，因此它们的发现非常重要。然后，为了研究光强度的检测极限条件，改变病变部分的直径的大小，并且通过使用数值模拟来研究检测到的光强度的影响。分析模型是直径为100 mm的球体，并且通过改变假设皮肤、颅骨、白色物质和疾病部分的吸收系数来模拟每个部分。由于对于6mm或更大的直径检测到的光强度在溶液中没有变化，并且作为分析结果，在疾病和健康时的光强度中完全出现差异，因此认为发现疾病部分是可能的。接下来，为了研究光强与病变部位位置的关系，使用上述方法在光源和检测器的直线上以相等的间隔布置五个病变部位。在光源附近的点处，检测到的光强度在健康和疾病时没有差异，并且没有指定疾病部位的存在。然而，认为通过将对象或光源的位置旋转180度，可以检查病变部分的存在，上述结果是，通过旋转对象对象，即使病变部分在哪个位置，也可以通过光学CT检测到脑内1cm或更小的病变的存在。由于通过使用这种方法实现了不使用X射线的安全医疗检查，因此表明可以预防疾病。

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.