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Stack #130118
Question | Answer |
---|---|
caliper | device used to measure part thickness |
fixed kvp charts | the kvp is held constant for a given range of subject densities while the mas is varied to achieve an appropriate image density |
variable kvp fixed ma chart | kvp is adjusted for changes in part thickness while maintaining a fixed mas |
detectors | devices used to measure radiation in an AEC system |
minimum response time | the shortest exposure time that a particular system can produce |
backup time | maximum length of time the x-ray exposure will continue |
three | number of detectors an AEC system generally have |
good positioning skills | most important skill a radiographer should possess when using an AEC system |
anatomically programmed radiography | a radiographic system that combines an AEC system with a technique chart that is computerized to correspond to anatomical procedures |
six hundred mas | backup time exposure should not exceed this |
one milisecond | minimum response time in order to cut exposure |
autotomography | breathing technique |
APR | anatomically programmed radiography |
light paddles | detectors used in photomultiplier tube |
photomultiplier tube | type of AEC that gives off light when radiation hits it |
electricity | photomultiplier tube converts light to this |
ionization chamber | hollow cell that contains air and is connected to the timer circuit by an electrical wire |
entrance type | type of AEC whose detectors are positioned in front of the cassette |
exit type | type of AEC whose detectors are behind the cassette |
Kilovoltage peak | controls the potential difference between the cathode and anode and causes the electrons to flow between cathode and anode |
MA | factor controlling the number of electrons which wil flow from cathode to anode during x-ray exposure |
tube current | term used to describe the number of electrons flowing across the tube |
small focal spot | will produce more radiographic detail when used; most often with extremities |
Critical | part measurement for variable kvp/fixed mas charts is what |
Shorter | the scale of contrast for variable kvp/fixed mAs is what |
Variable | is what radiographic contrast is for variable kvp/fixed mAs |
Higher | patient dose is thisfor variable kvp/fixed mAs |
increased | tube heat load is this for variable kvp/fixed mAs |
less critical | part measurement for fixed kvp/variable mAs |
longer | contrast scale for fixed kvp/variable mAs |
standardized | radiographic contrast for fixed kvp/variable mAs |
lower | patient dose for fixed kvp/variable mAs |
decreased | tube heat load for fixed kvp/variable mAs |