In this paper, we present a CMOS digital intra-oral sensor for x-ray radiography. The sensor system consists of a custom CMOS imager, custom scintillator/fiber optics plate, camera timing and digital control electronics, and direct USB communication. The CMOS imager contains 1700 x 1346 pixels. The pixel size is 19.5um x 19.5um. The imager was fabricated with a 0.18um CMOS imaging process. The sensor and CMOS imager design features chamfered corners for patient comfort. All camera functions were integrated within the sensor housing and a standard USB cable was used to directly connect the intra-oral sensor to the host computer. The sensor demonstrated wide dynamic range from 5uGy to 1300uGy and high image quality with a SNR of greater than 160 at 400uGy dose. The sensor has a spatial resolution more than 20 lp/mm.
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机译：在本文中，我们介绍了用于X射线放射照相的CMOS数字口腔内传感器。传感器系统包括一个定制的CMOS成像器，一个定制的闪烁器/光纤板，摄像头定时和数字控制电子设备以及直接的USB通信。 CMOS成像器包含1700 x 1346像素。像素大小为19.5um x 19.5um。该成像器采用0.18um CMOS成像工艺制造。传感器和CMOS成像器设计具有倒角，可为患者带来舒适感。摄像机的所有功能都集成在传感器外壳内，并且使用标准USB电缆将口内传感器直接连接到主机。该传感器表现出从5uGy到1300uGy的宽动态范围和高图像质量，在400uGy剂量下的SNR大于160。该传感器的空间分辨率大于20 lp / mm。
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