Baba Rika, Konno Yasutaka, Ueda Ken, Ikeda Shigeyuki
Central Research Laboratory, Hitachi Ltd., 1-280 Higashi-koigakubo, Kokubunji-shi, Tokyo 185-8601, Japan.
Comput Med Imaging Graph. 2002 May-Jun;26(3):153-8. doi: 10.1016/s0895-6111(02)00008-3.
We evaluated a flat-panel detector (FPD) (scintillator screen and a-Si photo-sensor array) for use in a cone-beam computed tomography (CT) detector and compared it with an image-intensifier detector (IID). The FPD cone-beam CT system has a higher spatial resolution than the IID system. At equal pixel sizes, the standard deviation of noise intensity of the FPD system is equal to that of the IID system. However, the circuit noise of the FPD must be reduced, especially at low doses. Our evaluations show that the FPD system has a strong potential for use as a cone-beam CT detector because of high-spatial resolution.
我们评估了一种用于锥束计算机断层扫描（CT）探测器的平板探测器（FPD）（闪烁体屏幕和非晶硅光电传感器阵列），并将其与图像增强器探测器（IID）进行了比较。FPD锥束CT系统具有比IID系统更高的空间分辨率。在像素尺寸相等的情况下，FPD系统噪声强度的标准差与IID系统相等。然而，必须降低FPD的电路噪声，尤其是在低剂量时。我们的评估表明，由于具有高空间分辨率，FPD系统作为锥束CT探测器具有很大的应用潜力。
