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Radiology

Chapter 6 Vocab - Part 2

QuestionAnswer
Line Meter A voltmeter which monitors incoming voltage.
Line Voltage Compensator A variable contact on the primary side of the autotransformer necessary to ensure that the outgoing voltage is accurate, regardless of fluctuations in the incoming line.
kVp meter Measures the voltage output from the autotransformer. Also called a prereading voltmeter.
Rheostat A continuously variable electrical resistor used to regulate current.
mA selector A control, providing several choices in the amount of resistance in the filament circuit.
Milliammeter (mA meter) Measures the current flow in the high-voltage circuit during an exposure.
Rectification To make right. Ensuring that the flow of current is only in the right direction.
Self-rectification Current flows in this circuit only during the portion of the electrical cycle when the anode is positive and cathode is negative.
Three-Phase Current generates x-rays more efficiently than single-phase current, decreasing exposure times by 40% to 50%.
Tube Rating Chart A guide used to keep routine exposures below the limits of the tube heat capacity.
Synchronous timer A manually set device used for exposure control.
Rotor Switch When this is activated, the rotating anode begins to spin, and heat is applied to the filament to create the space charge.
Phototimer Photomultiplier tubes that are sensitive to light. It terminates the exposure after a specific quantity of light has been detected.
Rectifier The unit that's purpose is to change the AC into direct current (DC) so that it flows only in one direction.
Single-Phase Current Results in a pulsating beam. In one of these there are 60 electric cycles that produce 120 impulses.
Created by: hollieritter