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Concerning signal processing with computed radiography: a. The signal-to-dose relationship differs from that of film-screen radiography b. Contrast within the final computed radiography image may be greater than is achievable with film-screen radiography c. It demonstrates better spatial resolution than film-screen radiography d. Increasing pixel size improves resolution e. Image plate processing does not affect resolution |
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Answer» a. True. The relationship differs from the characteristic curve of conventional radiography. Essentially, the response demonstrates wide latitude. b. True. Even though the computed radiography response demonstrates wide latitude, post-processing of the data may allow better contrast to be seen within the image. This may include rejection of signals outside the useful range and edge enhancement. c. False. d. False. The opposite is true. e. False. The laser light, which is used for processing of the latent image, may be spread out over the phosphor, increasing the area over which light is emitted. This effect is increased with increasing size of the phosphor crystals. The diameter of the laser beam also affects resolution. |
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