1.

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

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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