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Evaluation of models of spectral distortions in photon-counting detectors for computed tomography.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cammin, Jochen Kappler, Steffen Weidinger, Thomas Taguchi, Katsuyuki |
| Copyright Year | 2016 |
| Abstract | A semi-analytical model describing spectral distortions in photon-counting detectors (PCDs) for clinical computed tomography was evaluated using simulated data. The distortions were due to count rate-independent spectral response effects and count rate-dependent pulse-pileup effects and the model predicted both the mean count rates and the spectral shape. The model parameters were calculated using calibration data. The model was evaluated by comparing the predicted x-ray spectra to Monte Carlo simulations of a PCD at various count rates. The data-model agreement expressed as weighted coefficient of variation [Formula: see text] was better than [Formula: see text] for dead time losses up to 28% and [Formula: see text] or smaller for dead time losses up to 69%. The accuracy of the model was also tested for the purpose of material decomposition by estimating material thicknesses from simulated projection data. The estimated attenuator thicknesses generally agreed with the true values within one standard deviation of the statistical uncertainty obtained from multiple noise realizations. |
| Starting Page | 023503 |
| Ending Page | 023503 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.spiedigitallibrary.org/journals/Journal-of-Medical-Imaging/volume-3/issue-02/029801/Errata--Evaluation-of-models-of-spectral-distortions-in-photon/10.1117/1.JMI.3.2.029801.pdf |
| PubMed reference number | 27213165v1 |
| Alternate Webpage(s) | https://doi.org/10.1117/1.JMI.3.2.023503 |
| DOI | 10.1117/1.JMI.3.2.023503 |
| Journal | Journal of medical imaging |
| Volume Number | 3 |
| Issue Number | 2 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Attenuator Device Component Calibration Coefficient Detectors Estimated Kartagener Syndrome Monte Carlo Method Photons Sixty Nine Small Standard deviation Tomography, Emission-Computed Tomography, Emission-Computed, Single-Photon X-Ray Computed Tomography |
| Content Type | Text |
| Resource Type | Article |
