What's a part?
1) Radiation "QUALITY" is defined as:
2) It is expressed in....
1) penetrability or energy
2) kVp or HVL
The fluctuation in the voltage applied to the x-ray tube expressed as a percentage of peak kilovoltage.
What is voltage ripple?
A type of transformer having a single winding.
What is an autotransformer?
1) Radiation "QUANTITY" is defined as:
2) How is it expressed?
1) intensity or # number of x-rays
2) mGya or mGya/mAs
The product of voltage and current.
What is Power (watt)?
An electronic device designed to terminate x-ray exposure after properly exposing an image receptor.
What is AEC?
The process of changing alternating current and voltage into direct current and voltage.
What is rectification?
How does primary voltage relate to secondary voltage in an autotransformer?
Primary and secondary voltage are in direct relation to the number of turns of the transformer.
The product of tube current and exposure time is ____, which is also electrostatic charge (C).
mAs
What are the three main components of the x-ray tube?
1) console
2) x-ray tube
3) high-voltage generator
Adjusts the voltage to the x-ray imaging system to a constant value, to compensate for fluctuations in voltage supplied by the power company.
What is the function of the line compensator?
Generator that uses maximum tube loading and drops during exposure.
What is falling load generator?
Which meter is placed across the output terminals of the autotransformer to read the voltage?
kVp meter
(the low voltage becomes the input to high-voltage step-up transformer that increases voltage to selected kVp)
The electric tube current that crosses from the cathode to the anode is measured in ______.
milliamperes (mA)
A material that can sometimes conduct an electric current and sometimes not, depending on the voltage applied across that material.
What is a semiconductor?
An electric circuit device that stores electric charge.
What is a capacitor?
The primary voltage input of the autotransformer is 220V, but the output is controllable from appx ____ to _____V.
100-400
Which component supplies precise voltage to the filament cirucuit & to the high-voltage circuit of the x-ray imaging system?
the autotransformer
The filament current normally operates at ___ to ___ A.
3-5 amperes
Which transformer in the x-ray circuit is a step-down transformer?
What is the filament transformer?
What are the three components that make up the high-voltage generator?
1) high-voltage step-up transformer
2) Filament transformer
3) rectification circuit
List the 5 major controls on the operator's console?
1) On/off control
2) kVp selection
3) mA selection
4) time (mAs) selection
5) AEC
To vary and control the amplitude of the voltage supplied to the high-voltage step-up transformer and the filament transformer.
What is the purpose of the autotransformer?
The number of electrons emitted by filament is determined by the _______ ________.
filament temperature
(as current increases, temp increases... therefore more electrons released via thermionic emission) too much heat, can damage the filament
Precision resistors result in ________.
fixed mA stations
(100, 200, 300 & higher)