105 x-ray circuit

Which of the following devices is used to control voltage by varying resistance?

Rheostat

Supplies the heating current for the filament of the x-ray tube ?

Low voltage/ filament circuit

Which of the following will produce the most load on an x-ray tube?

Low kVp and high mAs

Which of the following will produce the least load on an x-ray tube?

High kVp and low mAs

Which of the following types of current supplies the x-ray tube?

Pulsating direct current

Keeps the circuit from overloading from excessive amperage

Fuses

Indicates kV before the exposure is made

Pre-reading kV meter

Control the current to the primary coil of the transformer (duration of time)

Timer and x-ray exposure switch

Double blade, single throw

Main breaker/switch

Where the x-rays are produced

X-ray tube

Which of the following is required of a target material in an x-ray tube?

High density

High atomic number

High melting point

Step-down transformer increases current but decreases voltage

Step up transformer increases current voltage but decreases current

Increasing resistance decreases current and decreasing resistance increases current if same voltage is being kept

Also called variable resistor the greater the resistance the smaller the current

Rheostat

Connected in series measures filament current

Filament ammeter (mA selector)

Step up voltage ( volts to kilovolts)

Step up transformer

How do you know you took a good exposure?

Audible ( can be heard)

Visible ( see light flash )

What is the source of brems and characteristic rays?

Anode

This portion of the circuit is where the voltage gets stepped up by a ration 500:1 or 1000:1

Secondary/ High voltage circuit

Primary/low voltage circuit

Main switch

Fuses

Autotransformer

Pre-reading kV selector

Exposure circuit/ switch

How are the mA meters connected ?

In series

Changes the AC supplied to the transformer to DC

Rectifiers

Secondary/High voltage circuit

Step up transformer

Rectifier

Ma meter

X-ray tube

What type of motor drives the rotating anode

Induction

Kv meter is placed before or after the Autotransformer

After

Step down transformer, Reduces current and voltage to the x-ray tube

Filament transformer (works on mutual induction)

What is the mA selector?

Filament ammeter

Connected in series, Measures the mA in the x-ray tube during exposure

MA meter

Low volatage/ filament circuit

Rheostat

Filament ammeter

Filament transformer

Changes the voltage supplied to the primary of the transformer, thereby providing various kV for the x-ray tube

Autotransformer

What is used to focus the electron stream toward the target of the anode?

Molybdenum focusing cup

Current is selected through

Rheostat