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Module 4 Physics
| Question | Answer |
|---|---|
| scintillator-based flat-panel detector | converts the x-ray beam to light and then that light is converted into electrons to create an image |
| non-scintillator based detector | converts the x-ray beam into electrons to create an image |
| Photostimulable phosphor | stores the energy from its interaction with an x-ray beam |
| PSP plate is found in two types of systems. | Cassette-based and Cassette-less |
| Charge-coupled Device | Uses a scintillator and a CCD to create the image |
| Digital Images are Evaluated Based On | Brightness Contrast Image Blur Exposure Indicator Image Noise |
| Relative screen speed can be increased by increasing the factor(s) | Absorption efficiency Conversion efficiency Phosphor layer thickness Phosphor packing density Phosphor crystal size Adding a reflective layer |
| Relative screen speed decreases when | Phosphor dye is added |
| What determines relative speed of an analog receptor? | the radiation needed to produce a predetermined film density, typically a density of 1.0 + Base + Fog |
| Advantage of screen dye | provide greater sharpness, or resolution, in images. |
| Conversion efficiency | a measure of how efficient the phosphor is at converting the x-ray photon energy into light. |
| Absorption efficiency | a measure of how effective the phosphor is at absorbing the x-ray photons. |
| Detective Quantum Efficiency (DQE): | A measure of a receptor's ability to create an output signal that accurately represents the input signal (x-ray beam). |
Created by:
cajunmama5
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