Podcast
Questions and Answers
Name the 2 subdivisions of the x-ray circuit.
Name the 2 subdivisions of the x-ray circuit.
Main circuit, Filament circuit
Define/describe the Main circuit.
Define/describe the Main circuit.
Supplies x-ray tube with high voltage (kVp), low amperage (mA) needed for x-ray production.
Define/describe the Filament Circuit.
Define/describe the Filament Circuit.
Supplies the filament in the cathode with ~10 volts, ~5 amps for thermionic emission.
What are the 2 parts/sides of the main circuit called?
What are the 2 parts/sides of the main circuit called?
Name the 5 components that make up the primary side of the main circuit.
Name the 5 components that make up the primary side of the main circuit.
Name the 4 components that make up the secondary side of the main circuit.
Name the 4 components that make up the secondary side of the main circuit.
What does the main breaker do and where is it usually located? What is the main power being supplied to our rooms for x-ray?
What does the main breaker do and where is it usually located? What is the main power being supplied to our rooms for x-ray?
What does the exposure switch do? Where is it located/connected to? What kind of switch is it?
What does the exposure switch do? Where is it located/connected to? What kind of switch is it?
What is attached in parallel to an Autotransformer?
What is attached in parallel to an Autotransformer?
Describe/discuss the Autotransformer.
Describe/discuss the Autotransformer.
What does the Timer Circuit do?
What does the Timer Circuit do?
What is the function of the Primary side of high voltage step-up transformer, and what does this specific component mark regarding the main circuit?
What is the function of the Primary side of high voltage step-up transformer, and what does this specific component mark regarding the main circuit?
What component marks the separation of the primary and secondary side of the main x-ray circuit?
What component marks the separation of the primary and secondary side of the main x-ray circuit?
What is attached in series to the Secondary side of the step-up transformer?
What is attached in series to the Secondary side of the step-up transformer?
What does the Rectification System do?
What does the Rectification System do?
What is the function of the rotor stator?
What is the function of the rotor stator?
What is the function of the Filament Circuit?
What is the function of the Filament Circuit?
For Thermionic emission to work, the incoming line in the circuit must be modified to ____ to ______ amps and ___ to _____ volts.
For Thermionic emission to work, the incoming line in the circuit must be modified to ____ to ______ amps and ___ to _____ volts.
Name the 2 components of the Filament Circuit.
Name the 2 components of the Filament Circuit.
What is another name for the rheostat?
What is another name for the rheostat?
What is another name for the variable resistor?
What is another name for the variable resistor?
Describe/Discuss Variable resistor (rheostat).
Describe/Discuss Variable resistor (rheostat).
What component of the x-ray circuit is controlled by mA selector?
What component of the x-ray circuit is controlled by mA selector?
What does the step-down transformer do in the filament circuit?
What does the step-down transformer do in the filament circuit?
Name the 5 common diagnostic x-ray console controls that are controlled by the technologists.
Name the 5 common diagnostic x-ray console controls that are controlled by the technologists.
For kVp control selection, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For kVp control selection, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For mA control selection, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For mA control selection, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For control of time selection, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For control of time selection, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For control of rotor switch, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For control of rotor switch, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For control of exposure switch, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
For control of exposure switch, what factor does it effect? What circuit element does it control? and where is it located within the x-ray circuit?
What does the timer circuit control?
What does the timer circuit control?
Where is the timer circuit located?
Where is the timer circuit located?
Name the 4 types of timers.
Name the 4 types of timers.
Describe/define Electronic timers.
Describe/define Electronic timers.
Name the lettered areas of the x-ray circuit.
Name the lettered areas of the x-ray circuit.
Name the numbered areas of the x-ray circuit.
Name the numbered areas of the x-ray circuit.
Which timer is the only timer located on the secondary side of the main circuit?
Which timer is the only timer located on the secondary side of the main circuit?
What kind of timer works based on exposure length and the time it takes to charge a capacitor through a variable resistor and once charge is complete, exposure is terminated?
What kind of timer works based on exposure length and the time it takes to charge a capacitor through a variable resistor and once charge is complete, exposure is terminated?
Describe/define Automatic exposure control (AEC).
Describe/define Automatic exposure control (AEC).
What is an ionization chamber and how does it work?
What is an ionization chamber and how does it work?
What type of timer uses an ionization chamber?
What type of timer uses an ionization chamber?
State the 2 main electrical requirements of an x-ray tube.
State the 2 main electrical requirements of an x-ray tube.
An x-ray generator converts __________ energy into ________ energy.
An x-ray generator converts __________ energy into ________ energy.
The part of the x-ray generator that supplies the high voltage necessary between the cathode and the anode is called the _______ circuit.
The part of the x-ray generator that supplies the high voltage necessary between the cathode and the anode is called the _______ circuit.
The part of the x-ray generator that supplies current and voltage to the cathode of the x-ray tube is called the __________ circuit.
The part of the x-ray generator that supplies current and voltage to the cathode of the x-ray tube is called the __________ circuit.
The main power line in a hospital is usually a ________ volt, ________ hertz A.C.source.
The main power line in a hospital is usually a ________ volt, ________ hertz A.C.source.
Each of the hot wires in the main power line varies up to __________ volts positive or negative, with respect to the neutral wire.
Each of the hot wires in the main power line varies up to __________ volts positive or negative, with respect to the neutral wire.
The turns ratio of an ____________ can be varied by selecting the number of turns between connectors on a single coil.
The turns ratio of an ____________ can be varied by selecting the number of turns between connectors on a single coil.
The voltage on the secondary side of the autotransformer shown below will be _________ (higher/lower) when the selector is at position 2 than when it's at position 5.
The voltage on the secondary side of the autotransformer shown below will be _________ (higher/lower) when the selector is at position 2 than when it's at position 5.
To raise the voltage higher than the autotransformer is capable of raising it, a _____________ transformer is included in the tube circuit.
To raise the voltage higher than the autotransformer is capable of raising it, a _____________ transformer is included in the tube circuit.
The autotransformer is connected at the __________ (primary/secondary) side of the step-up transformer.
The autotransformer is connected at the __________ (primary/secondary) side of the step-up transformer.
If a step-up transformer has a turns ratio of 500 to 1 and a voltage of 220 volts exists on the primary side, then the voltage of ____________ volts will exist on the secondary side.
If a step-up transformer has a turns ratio of 500 to 1 and a voltage of 220 volts exists on the primary side, then the voltage of ____________ volts will exist on the secondary side.
An x-ray tube operates most efficiently with ______ (AC/DC), but the auto-transformer and step-up transformer require ________ (AC/DC).
An x-ray tube operates most efficiently with ______ (AC/DC), but the auto-transformer and step-up transformer require ________ (AC/DC).
The circuit component that changes A.C. to D.C. is called a ___________.
The circuit component that changes A.C. to D.C. is called a ___________.
A __________ is a device that allows current to flow in one direction only.
A __________ is a device that allows current to flow in one direction only.
The two types of diodes are:
The two types of diodes are:
The purpose of the ____________ in the filament circuit is to allow the operator to vary the current in the circuit.
The purpose of the ____________ in the filament circuit is to allow the operator to vary the current in the circuit.
The position of the removable contact on the rheostat determines the amount of _________ and indirectly, the current in the filament circuit.
The position of the removable contact on the rheostat determines the amount of _________ and indirectly, the current in the filament circuit.
The filament circuit contains a ____________ (step up/step down) transformer.
The filament circuit contains a ____________ (step up/step down) transformer.
The tube and filament circuit are connected at what part of the x-ray tube?
The tube and filament circuit are connected at what part of the x-ray tube?
Study Notes
X-Ray Circuit Overview
- The x-ray circuit is divided into two main subdivisions: the main circuit and the filament circuit.
- The main circuit supplies high voltage (kVp) and low amperage (mA) to the x-ray tube for producing x-rays.
Main Circuit Components
- Comprised of two sides: primary low voltage side and secondary high voltage side.
- Key components of the primary side: main breaker, exposure switch, autotransformer, timer circuit, and primary side of the high voltage step-up transformer.
- Key components of the secondary side: secondary side of the step-up transformer, rectification system, x-ray tube, and rotor stator.
Filament Circuit Functionality
- Supplies approximately 10 volts and 5 amps to the filament in the cathode, enabling thermionic emission.
- Two main components include a variable resistor (rheostat) and a step-down transformer.
Voltage and Current Control
- Required modifications for thermionic emission are 3-5 amps and 6-12 volts.
- The autotransformer adjusts the incoming line voltage (220 V) based on kVp to produce the necessary voltage for the x-ray exposure.
- The timer circuit regulates the time duration the current flows through the x-ray tube, typically located on the primary side.
Exposure Controls
- Technologists control various functions via console controls: kVp selection, mA selection, time selection, rotor switch, and exposure switch.
- Electronic timers are commonly used, offering precise exposures based on capacitor charging time.
Rectification System
- Converts alternating current (AC) to direct current (DC) necessary for effective x-ray production.
- The diode is a crucial component; it only allows current flow in a single direction.
Additional Circuit Details
- Each hot wire in the main power line can vary by 110 volts relative to the neutral wire.
- The step-up transformer is crucial for increasing voltage beyond what the autotransformer can achieve.
- The x-ray tube operates efficiently with DC, while transformers require AC inputs.
Ionization Chamber and AEC
- The automatic exposure control (AEC) uses an ionization chamber to determine exposure termination based on the patient's body thickness and composition.
- The ionization chamber liberates electrons when ionized by x-rays, generating an electric charge that signals exposure stop.
Summary of Terminology
- The main circuit provides the necessary high voltage for the x-ray tube, while the filament circuit supplies lower voltage and current specifically for the filament.
- Critical terms include: autotransformer, step-down transformer, rheostat (variable resistor), and diode.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the fundamentals of x-ray circuits through this quiz. Learn about the main circuit and filament circuit, along with their functions in x-ray production. Perfect for students studying radiology or imaging technology.
