RADT 456: Equip&QC Word Scramble
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| Question | Answer |
| The type of x-ray tube designed to turn on and off rapidly also providing multiple short exposures | Grid controlled |
| True or False:Components of a CT gantry include a high-voltage generator, multidetector array and x-ray tube | True |
| What is the relationship between kV and HVL? | As kV increases, HVL increases |
| True or False: a backup timer for the AEC serves to increase or decrease master density? | False |
| A slit camera is used to measure what? | Focal spot size and spatial resolution |
| Characteristics of the metallic element tungsten include what? | Ready dissipation of heat, high melting point and high atomic number |
| 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 |
| What is a charge coupled device used for? | Used in digital fluoroscopy, replacing the image intensifier's television camera tube |
| 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 |
| Star and wye configurations are related to what? | Three phase transformers |
| What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus | beam splitter |
| True or False: A characteristic of an x-ray photon is travelling at the speed of sound | False |
| The kV settings on radiographic equipment must be tested annually and must be accurate to within | +/- 4 kV |
| A device used to ensure reproducible radiographs, regardless of tissue density variations | automatic exposure control |
| The image intensifier tube's input phosphor functions to convert | x-rays to light |
| Amount of electric charge flowing per second | Current |
| 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 |
| The brightness level of the fluoroscopic image can vary with what? | mA, kV and patient thickness |
| Moving the image intensifier closer to the patient during fluoroscopy does what? | decreases the SID, decreases patient dose and improves image quality |
| 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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