A curved image sensor on plastic foil has been developed for cone beam computed tomography (CBCT) X-ray imaging. The image sensor of about 6 × 8 cm² size has been built on a thin polyimide foil with an indium gallium zinc oxide (IGZO) backplane and an organic photodetectors (OPD) frontplane. A flexible cesium iodide (CsI) scintillator has been attached to the optical sensor with 480 × 640 pixels of 126 µm size. Dark current density of the OPD was low with less than 10⁻⁷ mA/cm² at −2 V, while an external quantum efficiency (EQE) of about 50% was reached in the visible wavelength range matched to the scintillator output. The image quality of the digital X-ray detector allowed for 3D reconstruction images of a bone phantom on a rotating stage with a lab setup. The curved detector with 32 cm curvature radius opens up the path for very compact CBCT gantries with largely reduced footprint.

在塑料箔上的弯曲图像传感器已被开发用于锥形束计算机断层扫描（CBCT）X射线成像。尺寸约为6×8 cm ²的图像传感器建立在带有铟镓锌氧化物（IGZO）背板和有机光电探测器（OPD）前面板的聚酰亚胺薄箔上。柔性碘化铯（CsI）闪烁体已连接到480×640像素，尺寸为126 µm的光学传感器。OPD的暗电流密度低，小于10 ^-7  mA / cm ²在-2 V下，在与闪烁体输出匹配的可见波长范围内达到了约50％的外部量子效率（EQE）。数字X射线检测器的图像质量允许在具有实验室设置的旋转载物台上对骨骼模型进行3D重建图像。曲率半径为32 cm的弯曲检测器为非常紧凑的CBCT门架打开了道路，并大大减小了占地面积。