X-ray detectors currently employed in dosimetry suffer from a number of drawbacks including the inability to conform to curved surfaces and being limited to smaller dimensions due to available crystal sizes. In this study, a hybrid X-ray detector (HXD) has been developed which offers real-time response with added advantages of being highly sensitive over a broad energy range, mechanically flexible, relatively inexpensive, and able to be fabricated over large areas on the desired surface. The detector comprises an organic matrix embedded with high-atomic-number inorganic nanoparticles which increase the radiation attenuation and within the device allows for simultaneous transfer of electrons and holes. The HXD delivers a peak response of 14 nA cm−2, which corresponds to a sensitivity of $30.8~\mu \text{C}$ Gy−1 cm−2, under the exposure of 6-MV hard X-rays generated by a medical linear accelerator. The angular dependence of the HXD has been studied, which offers a maximum variation of 26% in the posterior versus lateral beam directions. The flexible HXD can be conformed to the human body shape and is expected to eliminate variations due to source-to-skin distance with reduced physical evaluation complexities.

中文翻译：

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用于实时直接检测硬 X 射线的混合多像素阵列 X 射线探测器

目前在剂量测定中使用的 X 射线探测器具有许多缺点，包括无法适应曲面和由于可用的晶体尺寸而受限于较小的尺寸。在这项研究中，开发了一种混合 X 射线探测器 (HXD)，它提供实时响应，并具有在宽能量范围内高度灵敏、机械灵活、相对便宜且能够在大面积上制造的额外优势。所需的表面。检测器包括嵌入高原子序数无机纳米粒子的有机基质，可增加辐射衰减，并在设备内允许电子和空穴的同时转移。HXD 提供 14 nA cm−2 的峰值响应，对应于 $30.8~\mu \text{C}$ Gy−1 cm−2 的灵敏度，在医疗直线加速器产生的 6-MV 硬 X 射线照射下。已经研究了 HXD 的角度相关性，它在后束方向与侧束方向上的最大变化为 26%。灵活的 HXD 可以贴合人体形状，并有望消除由于源到皮肤距离引起的变化，并降低物理评估的复杂性。