Bushong Chapter 15
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The range of exposure over which a film produces an image if the definition for? | show 🗑
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| show | 2. Double the exposure index
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| Which radiographic image capture method uses chemical development to produce the manifest image? | show 🗑
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| show | Linear, non-threshold
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| T/F: If grid lines are present and run parallel to the scanning laser, the image will not have the moire pattern present. | show 🗑
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| T/F: Digital systems are less sensitive to scatter radiation than film/screen systems? | show 🗑
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| The arrangement of pixels in rows and columns is known as? | show 🗑
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| T/F: Aliasing occurs when the sampling frequency is not greater than twice the frequency of the input signal? | show 🗑
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| The active layer in a PSP plate is usually made of phosphors from what family group? | show 🗑
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| show | Reflective
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| show | Light
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| What device in the reader detects the light being released from the PSP plate during reading? | show 🗑
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| show | 1. After every PSP plate is read. 2. By flooding it with a bright light. 3. Manually by selecting the proper eraser method.
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| show | False
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| Exposure latitude with digital imaging is more _____ when compared with analog imaging. | show 🗑
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| In digital imaging, the term _____ replaces density as applied in analog based imaging. | show 🗑
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| show | High
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| show | Mottle
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| T/F: The greater the exposure to the plate, the greater the intensity of the light is emitted from the plate during the reading. | show 🗑
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| T/F: Fifty percent of the IP must be exposed to produce a correct reading of the image. | show 🗑
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| show | Fluorescence
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| show | 1. Increased dynamic dynamic range 3. More contrast resolution
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| Each cell of an image matrix is called? | show 🗑
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| show | Matrix size and the size of the field of view
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| show | Signal loss
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| show | White lines
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| show | To assess the level of detector noise in the system.
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| show | 8
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| The active portion of a CR imaging plate is? | show 🗑
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| show | In the 1970's
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| When was CR introduced to the medical field? | show 🗑
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| T/F: CR is the most widely used from of digital radiography. | show 🗑
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| What does PSP stand for? | show 🗑
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| show | Storage phosphor screen
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| show | PSP: before its exposed. SPS: after its exposed
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| show | 5
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| What are the 5 layers of the PSP plate? | show 🗑
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| What is the purpose of the protective layer? | show 🗑
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| show | It is the active layer where the latent image is formed.
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| show | To increase efficiency.
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| What is the purpose of the base layer? | show 🗑
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| What is the purpose of the back layer? | show 🗑
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| What is the back layer made of? | show 🗑
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| show | Barium fluorohalide and europium.
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| show | BaFBr:Eu or BaFI:Eu
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| What is the role of the europium? | show 🗑
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| Photostimulable phosphors emit light when they are stimulated by?? | show 🗑
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| Why are phosphors linear versus "block shape"? | show 🗑
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| show | Xrays interact with the outershell e- of photostimulable phosphor via compton (scatter) and photoelectric (absorption) interactions causing excitation of the outer shell e-
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| show | Outer shell e- becomes excited, leaves it orbit while simultaneously producing light.
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| What is the third step in the process of latent image formation? | show 🗑
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| What is the fourth step in the process of latent image formation? | show 🗑
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| When can electrons return to their orbits? | show 🗑
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| How many electrons lose energy and drop back into their shell? | show 🗑
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