Image Processing and Display
PACS stands for
Picture Archiving and Communication System
Essentials of Radiographic Physics and Imaging - Pg 125
The glass envelope made of
Pyrex glass - Borosilicate glass
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Amorphous Silicon
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Material a transformer is comprised of
Soft Iron
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Automatic Exposure Control (AEC) can also be called
Phototiming
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High kVp, Long scale, ...
Low contrast
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A dual focus tube refers to a tube with
2 filaments, large and small
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Job of Cesium Iodide
Convert x ray to light
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Rectification
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Minimal Response Time (MRT)
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How you would find pixel size
FOV/Matrix size
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The anode is the ___ end of the tube
Positive
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In Computed Radiography, the photo-stimulable phosphor is
Europium Doped Barium Fluorohalide
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High frequency rectification ripple
Less than 1%
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Most common radiographer error while using AEC
Selecting a detector
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Primary factor influencing contrast with digital systems
Look Up Table (LUT)
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The part(s) of the X-ray tube is located outside the glass envelope
Stators
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In Indirect Digital Radiography, this serves a similar purpose as a Charged Coupled Device (CCD)
Complementary Metal Oxide Semiconductor (CMOS)
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Job of generators
Converts mechanical energy into electrical energy
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When operating at or above 50 kVp, back up timers are terminated at a maximum of
600 mAs
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With a sufficient technique and low signal-to-noise ratio, this increases the contrast along the edge of a structure
Edge Enhancement
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Formula for calculating Heat Units
kVp x mA x s x c
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In Direct Radiography, x-rays are absorbed by
Amorphous Selenium, a-Se
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Materials of a rectifier
Solid State Diodes
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The increment, +3 , on the density controls is equal to (assuming common increments)
+75%
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