Imaging Systems Flashcards
Electric ground
Neutral object ready to receive electrons; reference point in an electrical circuit from which voltages are measured
Autotransformer
Variable ratio transformer, single iron core, self induction, supplies a precise voltage to the filament circuit and to the high voltage circuit
Voltage/electromotive force
AKA Potential, potential difference;
The force that propels electrons
Amperage
AKA current/impedence;
The number of electrons in motion
1 Amp = 6.3x10 to the 18th power electrons per second
Direct current
Electrons flowing in a single direction, constant magnetic field
Alternating current
Electrons flowing in a back/forth motion, changing magnetic field
Transformer
Reconfigures wattage from primary or secondary.
More turns = stronger magnet
Rectifier/diode
Changes AC to DC, 4 rectifiers required
Capacitor
Stores electric charge temperature temporarily
Line compensator
Adjusts incoming voltage to the precise voltage value that the system is designed to operate on.
Line = what the power company sends us
Major KVP selector
Selector in steps of 10kv
Minor KVP selector
Selector in steps of 1-2kv
Rheostat
Absolute resistor used to adjust current of the varying resistance in an electric circuit.
Example = light dimmer switch
mA selector
Controls current that goes to the filament
Focal spot selector
Determines which filament it will use to transfer anode to cathode
Line monitor
Instrument used to analyze signal coming in
Filament transformer
AKA step down transformer
High voltage transformer
AKA step up transformer
KVP meter
Instrument used to measure X-ray generator tube potential
Mechanical timer
Exposure timer that is wind up
Synchronous timer
Exposure timer that measures the number of voltage pulses, capable of 1/120th of a second
Electronic timer
Exposure timer that is capable of 1/1000th of a second
mAs timer
Exposure timer that delivers a selected mAs without setting the time
mA meter
Instrument used to measure mA in a circuit
