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X-RAY DETECTOR AND METHOD FOR MEASURING ENERGY OF INDIVIDUAL X-RAY PHOTONS FOR IMPROVED IMAGING OF SUBJECTS USING REDUCED DOSE
X-RAY DETECTOR AND METHOD FOR MEASURING ENERGY OF INDIVIDUAL X-RAY PHOTONS FOR IMPROVED IMAGING OF SUBJECTS USING REDUCED DOSE
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机译:X射线探测器和用于减少物体剂量成像的个体X射线光子能量的测量方法
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摘要
An x-ray detector is designed to operate as an imaging spectrometer for imaging of a subject. The x-ray detector measures energy of individual x-ray photons in each of a plurality of pixels in the x-ray detector. The pixels of the x-ray detector are readout at a rate such that the likelihood of arrival of more than one x-ray photon in each pixel during a readout period is negligible. Because x-ray photons with different energy levels will create different magnitude responses in the x-ray detector, the measurements made by the x-ray detector can be weighted according to the energy level of the detected x-ray photons. Thus, responses due to noise or x-ray photons which contribute little or no x-ray attenuation information can be discarded or weighted to eliminate or reduce their effect on any resulting image. Conversely, measurements due to x-ray photons which provide significant attenuation information can be weighted significantly.
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