COLLIMATOR
| Uniformity is a parameter of the scintillation camera that depicts the variability of count density and distribution. A homogenous distribution of activity is essential to good diagnostic technique. Non uniformity may be visualized as either a "hot" or "cold" spot. A flood study would rule out non uniformities. Collimator defects or improper adjustment of the x and y deflector plates in the CRT (cathode ray tube) can cause this artifact. |
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