1998
DOI: 10.1117/12.317051
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Selenium direct-converter structure for static and dynamic x-ray detection in medical imaging applications

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Cited by 43 publications
(19 citation statements)
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“…This causes increase in positive charge injection from the pixel electrodes and neutralization of the trapped negative charge. There has been experimental evidence 40,41 of lag, i.e., an increase in dark current due to charge injection from the bias electrodes as a result of bulk trapping in a-Se after exposure to x rays.…”
Section: Shown Inmentioning
confidence: 99%
“…This causes increase in positive charge injection from the pixel electrodes and neutralization of the trapped negative charge. There has been experimental evidence 40,41 of lag, i.e., an increase in dark current due to charge injection from the bias electrodes as a result of bulk trapping in a-Se after exposure to x rays.…”
Section: Shown Inmentioning
confidence: 99%
“…The imaging performance of a FPI is affected by a multitude of characteristics, including: the behavior of pixel dark signal; 9 the linearity and gain of pixel signal response; 9 the effects of charge trapping, release, and image lag; 4,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] the spatial-frequency-dependent modulation transfer function ͑MTF͒, 5,15,[28][29][30][31] noise power spectrum ͑NPS͒, 32 and detective quantum efficiency ͑DQE͒, 15,[32][33][34][35] as well as contrast-detail performance. 4 This paper focuses specifically upon the subject of image lag, i.e., signal present in frames subsequent to the frame in which it was generated.…”
Section: Introductionmentioning
confidence: 99%
“…These results were consistent with those reported by other groups. [10][11][12] In the measurement of profile curves on the edges of static and moving tungsten material plates, the effect of image lag was seen as blurred edges of the plate. In the MTF measurement, the blurred edges of a moving target were indicated as reduction of MTF.…”
Section: Discussionmentioning
confidence: 99%
“…[6][7][8][9] Modifications in the technology of the a-Se detectors appear to have resulted in marked decreases in both lag and ghosting effects in more recent systems. [10][11][12] Recently, several methods for measuring temporal modulation transfer function (MTF) and detective quantum efficiency (DQE) have been proposed and the properties of FPDs used in dynamic imaging have been reported. [13][14][15] However, there have been no studies regarding how image lag and ghosting affect motion tracking by dynamic imaging with FPDs.…”
Section: Introductionmentioning
confidence: 99%