Xray imaging system Flashcards
Sections of the xray machine circuitry
Primary side (low voltage) Secondary side (high voltage) Filament circuit (low current)
3 main components of the xray imaging system
Xray tube
Operating / control console
High voltage generator
Primary side or control panel :
Main breaker
Exposure switch
Autotransformer
Timer circuit
Filament circuit :
Filament circuit variable resistor
Filament step down transformer
Secondary side :
Hogh voltage step up transformer
Four diode rectification circuit
Xray tube
Rotor stator
Use to control the VOLTAGE, CURRENT and EXPOSURE TIME
Operating / control console
Shoul contain the operator console , technique charts and space to store cassettes
Control booth
The wall was made up of
Lead
The xray table is made up of
Carbon fiber
Provided for monitoring kVp, mA and exposure time
Meters
Circuits are at _______ to minimize electric shock
Low voltage
Xray imaging should be operated on ____ power
220V
Measures the voltage provided to the cray imaging system and adjust to 220V/ volatege to be “smooth”
Line voltage compensator / Automatic line compensator
Power supplied to the Xray imaging system is forst delivered to the
Autotransformer
Has a single winding and designed to supply precise voltage to Filament circuit and highvoltage circuit
Autotransformer
Represent two separate series of connections on the autotransformer
Major and minor kVp
Minor kVp ______ the selected technique
Fine tunes
Exposure switch is also called
Dead man switch
It automatically terminates the exposure when the finger ceases to press on the timer button
Dead man switch / exposure switch
Used to control the length of the xray
Exposure timers
Basic exposure timers:
Mechanical
Synchronous
Electronic
mAs
Small portable and dental sets had mechanical or clockwork
Mechanical timer
Have an electric motor called synchronous moto which is accurate than clockwork timers
Synchronous timers
The most accurate exposure timer
Electronic Timer
To provide the highest safe tube current for the shortest exposure for any mAs selected
mAs timer
Monitors the product of mAs and exposure time and terminates exposure when desired mAs value is attained
mAs timer
Filament transformer is also known as
Filament heating isolation step-down transformer
It steps down the voltage to approximately 12V and provide current to the filament
Filament transformer
Thin copper and has current of 0.5 to 1 A and approx 150V
Primary windings
Thick and appox 12V and current of 5 to 8 A
Secondary windings
Autotransformer supplies precise voltage to :
Filament circuit
High voltage circuit
