1130 #2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | kVp and mA
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| show | positioning
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| show | greatest, greatest
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| show | readable
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| show | underexposed
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| show | no, it won't do any good
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| show | when densitiy is improper (over a prostesis)
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| show | Poor collimation
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| A proper ___________ __________ can reduce the number of repeated images and produce excellent images? | show 🗑
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| show | not over collimate
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| show | TOo dark
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| The back-up timer should always be set at ______% of the anticipated manual exposure time? | show 🗑
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| Will AEC always provide for a precisely repeatable exposure? | show 🗑
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| A technologist inadvertently selected all 3 cells while using an 8X10 film in the table bucky. Since the portion of the detector will be located outside of the collimated area, one can expect the film to have ______ density? | show 🗑
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| If a pt with a large consolidated pneumonia of the right and middle lobes. In the order to obain an image that evaluated the entire thorax, the _____ detector should be activated? | show 🗑
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| If the patient has a left pneumectomy, the _______ detectors should be activated | show 🗑
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| The cathode is on the _____ side? | show 🗑
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| show | cathode (x-ray ciruit)
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| show | tungsten
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| show | mA
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| show | 1.0-3.0 mm
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| show | Better detail
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| show | Have to use lower mA, limit size of primary beam field at a short SID
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| show | produces thermionic cloud by providing resistence to the flow of electrons
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| What amperage is neccessary for thermionic emission? | show 🗑
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| show | Narrow the thermionic cloud, repels staying electrons. As the electrons build up in the filament, the neg charges begin to oppose additional electrons
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| What is the function of the anode? | show 🗑
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| What is the purpose of the rotating anode? | show 🗑
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| show | tungsten
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| show | high melting point, high atomic #, heat conducting ability
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| show | will vaporize enough target focal track material to pit the target
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| show | short SID
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| Describe the target area? | show 🗑
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| How does the target area related to SID? | show 🗑
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| The total # of x-ray photons produced at the target is contingent upon what factor? | show 🗑
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| What is the common diagnostic radiographic target angle? | show 🗑
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| show | 2-6
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| Due to the anode heel effect, how much total variance in the number of photons can occur? | show 🗑
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| show | cause 20% more photons at the cathode end
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| What positioning change should be used to overcome the anode heel effect? | show 🗑
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| show | induction-motor electromagnetics comprise the stator that turns the anode
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| Where is the stator located? | show 🗑
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| show | hollow copper cylinder is attached to the anode disk by a molybdenum shaft. Silver plated ball barings around the shaft that attach to the glass envelope.
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| show | bad ball bearings
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| show | houses entire cathode and anode assembly. Keeps the vacuum
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| show | the primary x-ray beam exits the glass envelope
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| What is the protective housing's function? | show 🗑
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| show | 100 at 1
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| Within the tube, space charge refers to? | show 🗑
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| show | composed of photons that were not produced at the focal spot
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| show | 25-30%
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| show | plot mA, kVp, and time. Any combination under the curve is good
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| show | 0.78 joules
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| What is the heat unit formula? | show 🗑
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| Know how to use cooling charts | show 🗑
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| Know Bremsstrahlung Radiation? | show 🗑
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| show | Interacts w/ the force field of the nucleus
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| show | interacts with the inner shell
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| What shell do electrons drop into to produce characteristic photons in the diagnostic range? | show 🗑
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| show | 80-100 Kvp
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| show | Brems
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| What is the average primary beam photon energy? | show 🗑
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| What are the factors that affect both amplitude and position of the em\mision spectrum? | show 🗑
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| show | mA, time or mAs
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| Incoming line current hertz? | show 🗑
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| Type of current in the US Volts? | show 🗑
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| Type of current in the US | show 🗑
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| show | low voltage
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| show | when full-wave rectification is applied to 3 phase current, it produces a voltage ripple of 6 hz or 360 pulse per sec. ripple of 13-25%. Tube never falls below 75-87% of peak kilovoltage
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| What is line compensation and why is it used? | show 🗑
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| show | 3-5 and 6-12 volts
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| show |
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| Electronis timers? | show 🗑
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| How many amperes and volts must the imcoming line power be modified to? | show 🗑
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| Single phase generators? | show 🗑
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| show | 360 pps, 13-25% ripple 87% rms peak voltage voltage never falls below 75-87%
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| 3 phase, 12 pulse? | show 🗑
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| show | P=v x amp
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| What are hight frequency generators? | show 🗑
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| show | supplies AC current, mobile with recharging capabilities
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| show | Lg, patient radiation is absorbed and less converted to electrical signal. Takes longer exposure to get predetermines level. Length of time is directly related to density.
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| show | 3
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| show | 0.001 sec
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| show | protects patient fromexcessive radiation
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| show | 150 % or 2-3 times
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| What cannot be controlled by the radiographer when using AEC? | show 🗑
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| show | radiaion detection that produces small electrical current when struck by radiation
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| show |
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| show | radiation
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| If a patient is properly positioned for a left shoulder radiograph, which of the following detector choices should be used? | show 🗑
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