Computed Radiography
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| show | Emission of a visible light after excitation by a laser.
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| show | -The phosphor used in the screens in digital imaging.
-Usually barium fluorohalide.
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| show | Phosphor screen that hold the latent image in digital imagin.
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| show | The "cassette" which holds the SPS in digital imaging.
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| SP (Storage Phosphor) | show 🗑
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| PMT (Photomultiplier Tube) | show 🗑
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| PD (Photodiode) | show 🗑
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| show | - The "cassette" which holds the Photostimulable Phosphor in digital imaging.
- Looks much like screen film technology except that the Storage Phosphor Screen replaces the film and intensifying screens.
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| Cassette | show 🗑
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| Protective Layer | show 🗑
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| show | Holds the Photostimulable phosphor that "traps" electrons forming the latent image during exposure. Usually made of barium fluorohalide. May also contain a dye to prevent light spread.
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| show | Layer that sends light in a forward direction when released in the cassette reader.
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| Conductive Layer | show 🗑
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| Support Layer | show 🗑
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| show | Prevents light from erasing data on the imaging plate or leaking through the backing,
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| Backing Layer | show 🗑
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| show | Allows the technologist to match the image information with the patient-identifying barcode on the examination requested.
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| show | Imaging plate.
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| The Laser Beam | show 🗑
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| The Laser Beam: | show 🗑
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| show | Gathers the light from the SPS and converts it into an electronic signal which is in an analog form.
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| show | Converts the analog signal from the photomultiplier into a digital signal.
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| Erasing the image | show 🗑
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| show | Similar to the D log E curve in film/screen technology ( will cover in RAD exposure).
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| Image Noise | show 🗑
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| show | In CR imaging, the concept that kVp controls contrast does not hold true for CR imaging.
kVp and mAs only controls patient dose.
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| Erasing | show 🗑
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| Detection (Reading) the stimulated emission | show 🗑
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| show | - Those electrons who are still excited but trapped are released when exposed to a laser light (in the laser reader).
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| Stimulation: | show 🗑
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| show | - The Photostimulable Phosphor is exposed to radiation in the form of x-rays which allows the electrons in the Storage Phosphor Screen to become excited.
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| Exposure to Radiation: | show 🗑
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| show | 1. Exposure to radiation.
2. Stimulation.
3. Detection (Reading) the stimulated emission.
4. Erasing.
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| Computed Radiography | show 🗑
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| With _____ a dark room is unnecessary. | show 🗑
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| show | Spacial resolution.
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| _________ should be used soon after the erase cycle has been completed. | show 🗑
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| show | Small.
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| show | Are two processes of analog-to-digital conversion (ADC).
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| show | 14-bit.
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| _________ should be performed at lower techniques than screen-film radiography | show 🗑
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