Term
| Digital radiography systems replace traditional film with a: |
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Definition
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| Digital radiography is divided into 2 groups: |
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Definition
| Cassette based and Cassette-less |
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| Use a photostimulable phosphor (PSP) plate |
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| Cassette based are similar to: |
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Definition
| traditional film cassettes. |
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| Cassette based are referred to as: |
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Definition
| Computed radiography (CR) considered to be indirect digital radiography. |
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| Direct Digital radiography is: |
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| Casetteless detector and reader are a fixed part of: |
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| directly convert incoming x-ray photons into an electronic signal: |
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| uses a two part process involving a scintillator and a photodetector |
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| 1980s, computer equipment expensive, storage solutions not available. |
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Term
| Photostimulable imaging plates, latent image production, image acquisition, and reading digital radiography data. |
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Definition
| Indirect Photostimulable Phosphor Imaging Plate Systems. |
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Term
| Photostimulable Imaging Plates |
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Definition
| Photostimulable Phosphor(PSP0 and Imaging Plate (IP) |
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Term
| Insulates the imaging plate from handling trauma |
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Definition
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Term
| Holds the photostimulable phosphors: active layer |
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Definition
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| A base on which to coat other layers: |
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| Grounds the plate to eliminate electrostatic problems and absorb light to increase sharpness |
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| Prevents light from entering data on the plate: |
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Definition
| Europium activated barium fluorohalides |
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Definition
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Term
| PSPs absorb more low energy radiation than: |
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Definition
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| Electron pattern is stored in: |
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Definition
| active layer of exposed IP |
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Term
| Flourohalides absorb beam through: |
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Definition
| photoelectric interactions. |
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| Liberated electrons have: |
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Definition
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Term
| Fluorohalide crystals trap half of the liberated: |
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Definition
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Term
| Europium sites contain electron: |
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Definition
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Term
| The latent image will lose about 25% of its energy in: |
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Definition
| 8 hours, so it is important to process the cassette shortly after exposure. |
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Term
| Reading Digital Radiography Data: Trapped electrons are: |
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Definition
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Term
| Ip is scanned by finely focused: |
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Definition
| neon-helium laser beam in a raster pattern. |
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Term
| Electrons return to lower energy state: |
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Definition
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Term
| Two types of IP processing: |
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Definition
| Point by point read out and Line by line readout. |
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Term
| More detail, slower process: |
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| Faster process: loss of detail: |
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Term
| Determines number of density values-affects density and contrast of system: |
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Definition
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| Pixel depth is controlled by: |
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Definition
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| Pixel size is inversely related to: |
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Definition
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| Pixel size is dependent on: |
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Definition
| matrix and image receptor size |
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Definition
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| Larger matrix=more pixels= |
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| Greater bit depth=more shades of gray=more detail= |
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Definition
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| comminicates to the system: |
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Definition
| what part, orientation of the part, and number of projections per plate. |
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Definition
| Exposure Data Recognition |
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Term
| EDR is FUJI systems' method of locating the: |
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Definition
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Term
| Graphic representation of pixels and signal intensities present in image: |
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Definition
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Term
| Spatial frequency processing affects: |
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Definition
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Term
| Increases noise resulting in lower quality images |
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Definition
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Term
| Edge enhancement: lower_______and higher_______. |
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Definition
| contrast, base fog levels. |
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| Fuji system CR image quality |
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| Exposure index is directly proportional to the |
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| Image Acquisition Elements: Removal of some data that is recognized to be below or above the diagnostic imaging range. |
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Definition
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| Edge enhancement, image blurring |
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Definition
| Spatial frequency processing |
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Term
| adjusts the actual processing of data, not an option generally made available: |
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Definition
| Look up table adjustments |
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Term
| Histogram equalization, collimator edge identification, image stitching, grid use: |
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Definition
| Image Acquisition Elements |
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Term
| Scintillator or intensifying screen converts x-rays to: |
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Definition
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Term
| Amorphus silicon acts as: |
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Definition
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Definition
| Thin Film Transistors-array or matrix of pixel detectors. |
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Term
| system of computer software standards, allows different digital imaging software to understand each other. |
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Definition
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Term
| Computed Radiography Artifacts: |
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Definition
| Acquistion artifacts, post acquisition artifacts, and display artifacts. |
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| reductions in resolution due to dust |
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| Background radiation or scatter |
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| Error in image display protocols |
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| problems with laser imaging equipment |
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Definition
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Term
| uneven scanning, distortion, and overlapping shading, uneven transport of plate |
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Definition
| Laser film transport artifacts |
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Term
| incorrect histogram selection |
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Definition
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Term
| collimator boundaries not parallel to sides of imaging plate: |
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Definition
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