⚡ 本页包含 AI 生成的分析内容，仅供参考
提出了一种间接X射线光子计数图像传感器，采用27个晶体管的像素设计，实现了15e-rms的精确阈值。该传感器旨在通过光子计数达到X射线成像的量子极限，提高信噪比和灵敏度。
Vrije Universiteit Brussel, Brussels, Belgium In Fig. 6.6.4 the linear law applies to a voltage step that is 1/20th of the range; the exponential law shown applies to a ratio C2/C1=20. In the real circuit this ratio is 100. One can show that an overall accuracy better than the RMS on the count (which is identical to the X-Photon Shot Noise) can be obtained for counts between 0 and a several 1,000’s. 1 2 In X-ray imaging, as in other imaging domains, the ultimate sensitivity and signal-to-noise ratio are obtained when each incoming photon is counted - the socalled quantum limit. Present state-of-the-art digital radiography is largely “charge integration” based, which results in a read noise that is composed of the quantum-limited photon shot noise, but also of electronic read noise and excess noise due to the non-reproducible charge packet sizes per absorbed X-ray photon. State-of-the-art photon-counting imagers [1,2,3] use direct detection, i.e. the Xray-to-charge conversion happens by
Bart Dierickx1,2, Benoit Dupont1, Arnaud Defernez1, Nayera Ahmed1
Caeleste, Antwerp, Belgium,