The Xray Imaging System Part 1 Flashcards
Sections of X-ray machine circuitry
Primary side
Secondary Side
Filament circuit
Primary side :
Main breaker
Exposure switch
Autotransformer
Timer circuit
Secondary side :
High voltage step up transformer
Four-diode rectifier circuit
X-ray tube
Rotor stator
Filament Circuit
Filament circuit variable resistor
Filament step down transformer
Control console controls:
Voltage applied to the X-ray tube
Current through the X-ray tube
Exposure time
Most familiar part with rad tech
Control/operating console
Control booth contains:
Operator console
Technique charts
Space to store cassettes
Wall is made / shielded by:
Lead
Provided for monitoring kVp, mA and exposure time
Meters
Electric circuits connected to the meters are at ____
Low voltage to avoid electric shock
X-ray imaging is operated on ____
220 V power ;
110 V or 440V
Main problem
Accuracy of electric power supply
How much variations can affect X-ray production
5%
Measures the voltage provided to the X-ray imaging system
Line compensator / Line voltage compensator (LVC)
Adjust voltage to precisely 220 V
Line compensator / Line voltage compensator (LVC)
Makes voltage uniform or “smooth”
Line compensator / Line voltage compensator (LVC)
The power supply is first delivered to
Autotransformer
It has single winding and designed to supply a precise voltage
Autotransformer
Autotransformer is designed to supply a precise voltage to ___
Filament circuit
High voltage circuit
Determines voltage to step-up transformer
Autotransformer
Autotransformer is connected to the ____
KVp selector on the console
2 adjustments of kVp
Major kVp
Minor kVp
Minor kVp ____ the selected technique
Fine tunes
Major and minor kVp represents _____ on the autotransformer
Two separate series of connection
In series with the timer
Exposure switch
Exposure switch AKA
“Dead man switch”
Automatically terminates the exposure when finger ceases on the timer button
Dead man
Control the length of X-ray
Exposure timer
With high powered X-ray sets ; exposure time is
Very short and minimum time interval
Exposure timer should be
High degree of accuracy
Clockwork timer
Mechanical timer
Have electric motor called synchronous motor
Synchronous timer
Allow wide range of time intervals to be selected
Electronic timer
Most accurate X-ray exposure timer
Electronic timer
Monitors the product of mA and exposure time
mAs timer
Designed to provide the highest safe tube current
mAs timer
also known as filament heating isolation step-down transformer
Filament transformer
Steps down the voltage to approx. 12V and provide current to heat the filament
Filament transformer
Primary windings is made of ____ and provide current of _____ and approx _____
Thin copper
0.5 to 1 A
150 V
Secondary windings are _____ and approx ____ and carry a current of _____
Thick
12V
5 to 8 A
Three main components of X-ray imaging system
X-ray tube
Control console
High voltage generator
