Next Generation of SPECT using ultra small photon detectors and new type of Scintillators

体内剂量同位素的辐射光子检测是一种有效的诊断方法，可以通过测量孵化流量、测量组织代谢等方法进行诊断。单光子发射计算机断层扫描（SPECT）虽然具有不使用难以获取和处理的放射性同位素的优点，但空间分辨率仍有提高的空间。在这项研究中，我们建立了1毫米（FWHM 2.4毫米）的空间分辨率，而通常的方法是几毫米的分辨率，通过在每个1毫米× 1毫米截面的闪烁体晶体上附着一个1毫米× 1毫米的光子传感器，而通常的方法是通过几个光倍增管读出一个大的闪烁体晶体，并计算入射辐射的位置作为探测光子的重力质心。

Detection of radiative photons from dosed isotope in a body is efficient way for the diagnosis by measuring brood flow, measuring metabolism of tissues and so on. Although the single photon emission computer tomography (SPECT) has advantage that it does not use radio isotope which is difficult to get and to handle, there is a room to improve the spatial resolution.In this study we established 1 mm (FWHM 2.4 mm) spatial resolution whereas a few mm resolution was usual method, by using a 1 mm x 1 mm photon sensor attached on each scintillator crystal having 1 mm x 1 mm cross-section, whereas a large scintillator crystal is read out by several photo-multiplier tubes and position of incident radiation is calculated as the gravitational center of mass of detected photons in usual methods.