ARRT Registry Review
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| The type of x-ray tube designed to turn on and off rapidly also providing multiple short exposures | Grid controlled
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| True or False:Components of a CT gantry include a high-voltage generator, multidetector array and x-ray tube | True
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| What is the relationship between kV and HVL? | As kV increases, HVL increases
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| True or False: a backup timer for the AEC serves to increase or decrease master density? | False
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| A slit camera is used to measure what? | Focal spot size and spatial resolution
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| Characteristics of the metallic element tungsten include what? | Ready dissipation of heat, high melting point and high atomic number
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| A high speed electron entering the tungsten target is attracted to the positive nucleus of a tungsten atom and in the process is decelerated. This results in what? | Bremsstrahlung radiation
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| What is a charge coupled device used for? | Used in digital fluoroscopy, replacing the image intensifier's television camera tube
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| A three phase timer can be tested for accuracy using a synchronous top. The resulting image looks like what? | A solid arc, with the angle (in degrees) representative of the exposure time
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| Star and wye configurations are related to what? | Three phase transformers
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| What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus | beam splitter
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| True or False: A characteristic of an x-ray photon is travelling at the speed of sound | False
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| The kV settings on radiographic equipment must be tested annually and must be accurate to within | +/- 4 kV
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| A device used to ensure reproducible radiographs, regardless of tissue density variations | automatic exposure control
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| The image intensifier tube's input phosphor functions to convert | x-rays to light
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| Amount of electric charge flowing per second | Current
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| Characteristics of an x-ray tube target that determine heat capacity include what? | Rotation of the anode, diameter of the anode and size of the focal spot
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| The brightness level of the fluoroscopic image can vary with what? | mA, kV and patient thickness
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| Moving the image intensifier closer to the patient during fluoroscopy does what? | decreases the SID, decreases patient dose and improves image quality
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| Advantages of battery powered mobile x-ray units | ability to store a large quantity of energy and ability to store energy for extended periods of time
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