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equipt operation
ARRT registry review on equipt operation
question | Answer |
---|---|
true/false: Thermionic emission is associated with the anode. | False. It is associated with the cathode. |
What is automatic exposure control? | The minimum response time or minimum reaction time. |
What does a step-up transformer do to the voltage? | increases the voltage. |
What happens to the xrays beam as the kVp is increased? | the energy of the beam increases. |
What happens when a large quantity of heat is applied to a cold anode? | the anode can crack. |
What are the two priniple parts of an induction motor? | stator and rotor. |
What is the purpose of a phototimer? | to automatically terminate the x-ray exposure once the film is correctly exposed. |
What terms refers to an images recorded detail? | spatial resolution |
What does a spinning top test for? | the efficiency of a single-phase timer. |
What does reproducibility mean? | Repeated exposures at a given technique must provide consistent intensity. |
What is inherent filtration? | filtration that is built into the construction of the x-ray tube. |
True/False. PACS systems receive analog images. | False PACS systems receive digital images. |
Define current. | The amount of electric charge flowing per second. |
What percent of energy is converted to x-rays during an x-ray exposure? | Less than 1% |
What type of interaction takes place in bremsstrahlung x-ray production? | braking or slowed down interaction. |
What is the biggest factors effecting AEC? | patient thickness and densities. |
What is the purpose of a rectifier? | to change AC into unidirectional current by allowing current to flow through them in only one direction. |
What is the main difference between single-phase and three-phase equiptment? | Voltage never drops to zero in three-phase equiptment. |
What happens as the anode angle is decreased? | a larger actual focal spot may be used while still maintaining the same small effective focal spot. |
Which x-ray interaction contributes to occupational dose? | Compton interaction. |