Loading...
Please wait, while we are loading the content...
Similar Documents
K-edge energy-based calibration method for photon counting detectors
| Content Provider | Scilit |
|---|---|
| Author | Ge, Yongshuai Ji, Xu Zhang, Ran Li, Ke Chen, Guang-Hong |
| Copyright Year | 2017 |
| Description | Journal: Physics in Medicine & Biology In recent years, potential applications of energy-resolved photon counting detectors (PCDs) in the x-ray medical imaging field have been actively investigated. Unlike conventional x-ray energy integration detectors, PCDs count the number of incident x-ray photons within certain energy windows. For PCDs, the interactions between x-ray photons and photoconductor generate electronic voltage pulse signals. The pulse height of each signal is proportional to the energy of the incident photons. By comparing the pulse height with the preset energy threshold values, x-ray photons with specific energies are recorded and sorted into different energy bins. To quantitatively understand the meaning of the energy threshold values, and thus to assign an absolute energy value to each energy bin, energy calibration is needed to establish the quantitative relationship between the threshold values and the corresponding effective photon energies. In practice, the energy calibration is not always easy, due to the lack of well-calibrated energy references for the working energy range of the PCDs. In this paper, a new method was developed to use the precise knowledge of the characteristic K-edge energy of materials to perform energy calibration. The proposed method was demonstrated using experimental data acquired from three K-edge materials (viz., iodine, gadolinium, and gold) on two different PCDs (Hydra and Flite, XCounter, Sweden). Finally, the proposed energy calibration method was further validated using a radioactive isotope (Am-241) with a known decay energy spectrum. |
| Related Links | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6758551/pdf |
| Ending Page | 015022 |
| Page Count | 1 |
| Starting Page | 015022 |
| ISSN | 00319155 |
| e-ISSN | 13616560 |
| DOI | 10.1088/1361-6560/aa9637 |
| Journal | Physics in Medicine & Biology |
| Issue Number | 1 |
| Volume Number | 63 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2017-12-19 |
| Access Restriction | Open |
| Subject Keyword | Journal: Physics in Medicine & Biology Energy Calibration Photon Counting Detector |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology |
