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Charts
Tube Functions
Heat Units
Circuitry Parts
Functions of Tube Parts
100
The anode cooling chart determines the safety of this number of exposures.
What is a series of exposures?
100
KVP is the __________ applied within the tube that allows the focused electrons to be accelerated within the tube.
What is the force?
100
Heat units determine this.
What is the maximum heat capacity of the anode of the x-ray tube?
100
The anode spins at this rate (give the range).
What is 3600rpm-10,000rpm?
100
This is what the timer regulates.
What is the duration of x-ray production?
200
The tube rating chart determines the safety of this number of exposures.
What is a single exposure?
200
The rotating disk in the x-ray tube that is positively charged is called the __________.
What is the anode?
200
True or False. Three phase, 12-pulse generators are the most widely used today because they are the most efficient.
What is False. High frequency are used the most today.
200
The kVp meter is considered this because it is not actually measuring the kVp but instead is measuring the voltage of the autotransformer.
What is pre-reading?
200
This type of transformer has more windings on the primary side than the secondary side.
What is a step-down transformer?
300
The life of the tube will be reduced each time this is activated.
What is the rotor?
300
Three ___________ are built into the AEC system and can be activated to determine the exposure technique.
What are detectors?
300
This is what Automatic Exposure Control does.
What is terminates the exposure time after an exact amount of radiation for a given body part has been detected?
300
This is what the rectifier does.
What is changes AC to DC?
300
This is what the mA meter measures.
What is tube current?
400
A generator supplies this to the imaging department.
What is electricity?
400
600mAs is the maximum mAs that generators must terminate the exposure time at under this law.
What is Public Law 90-602?
400
Exposure time, mA, and kVp are the three _____ ______ that are set on the control panel.
What are technical factors?
400
The rectifier is composed of these types of diodes.
What is solid-state, silicon-based?
400
A step-up transformer increases voltage approximately this many times.
What is 500 times?
500
Self-induction and mutual induction are two types of this.
What is electromagnetic induction?
500
This provides the means for variable kVp selection, provides compensation for fluctuations in the incoming line voltage, and supplies power to the other parts of the x-ray circuit.
What is the autotransformer?
500
This is the most important factor when using AEC.
What is proper patient positioning?
500
This is the formula to calculate the heat produced by an exposure made on a single phase generator.
What is HU=mA x Time x kVp?
500
These are three good practices for extending the x-ray tube life.
What is warming up the anode according to the manufacturer's instructions, not holding down the rotor switch for long periods of time, using low mA settings whenever possible, not making repeated exposures near the tube limits, and not using a tube when you can hear the rotor bearings?