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Concerning artefacts in computed radiography: a. A ghost image refers to inadequate exposure of the image plate b. Artefacts from stationary grids do not occur c. Artefacts may be related to incorrect imaging processing techniques d. Laser-stimulated emission may be contributory e. Repeat exposures are not required for artefact correction |
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Answer» a. False. This is when the image plate has been incompletely erased since the previous exposure. b. False. Grids may be used in computed radiography as in film-screen radiography with the same effect on resultant image quality. c. True. For example, applying incorrect parameters involved in analysis of the intensity values to produce a specific gradation curve for a particular image. d. True. This may produce excessive shading across the image if not functioning correctly. e. False. If the problem is related to a faulty image plate, then data processing techniques will not be able to improve the diagnostic quality of the final image if the artefact is significant. |
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