X-RAY GENERATING APPARATUS Flashcards
Give 3 conditions that must exist fir x-rays to be produced:
- Source of electrons
- High voltage to impart speed to the electrons
- A target that can stop the electrons
X-RAY GENERATING APPARA
What are the x-ray generating apparatus:
- Electricity
- Electrical current
- Electrical circuit
It is an energy used to make x-rays.
ELECTRICITY
It is a form of energy associated with the flow of elections.
ELECTRICITY
Associated with the presence and flow of electric charge or electrons around a circuit.
ELECTRICITY
The measurement of electrical force needed to move electrons from a negative side (cathode) to a positive side (anode) electrode.
VOLTAGE
Negative side is?
Cathode
Positive side is?
Anode
It is measured in volts (V) or kilovolts (kV)
VOLTAGE
How much volts for dental radiography?
60 to 90kV or 60,000 to 90,000
volts
Give me 2 Electrical Current
- Direct Current
- Alternating Current
Flow of electrical energy (electrons) through a circuit
ELECTRICAL CURRENT
Measured in amperes
ELECTRICAL CURRENT
When the electrons flow in one direction through the conductor (e.g., batteries)
DIRECT CURRENT
The current is a steady constant electrical charge.
DIRECT CURRENT
In which the electrons flow in two, opposite directions.
ALTERNATING CURRENT
The current alternates between positive and negative, resulting in a voltage waveform shaped like a sine wave.
ALTERNATING CURRENT
The measurement of the number of electrons moving through a conductor
AMPERAGE
A number of electrons produced.
MILIAMPERAGE
Current is measured in Amperes (A) or milliamperes (mA)
AMPERAGE
Adjusted with a mA selector
AMPERAGE
Current is measured in:
Amperes (A) or milliamperes (mA)
What is the milliamperes for dental radiography?
8 to 15 mA
The flow of current occurs in two phases:
- POSITIVE PHASE
- NEGATIVE PHASE
First half cycle, anode has a positive
charge.
POSITIVE PHASE
Second half cycle, anode becomes a
negative charge.
NEGATIVE PHASE
When is the x-ray produced? At what phase?
POSITIVE PHASE
wWhen the current alternates it becomes:
NEGATIVE CHARGE
When the current alternates and becomes a negative charge, there will be ____?
no current flow and x-rays will not be
produced
____ > current flows > x-rays produced
First half-cycle
First half-cycle > ____ > x-rays produced
current flows
First half-cycle > current flows > ____
x-rays produced
____ > no current > no x-ray produced
Second half-cycle
Second half-cycle > ____ > no x-ray produced
no current
Second half-cycle > no current > ____
no x-ray produced
In x-ray production, there is a change in polarity of the
anode and cathode that occurs ____.
60 times per sec
No production of x-ray occurs (because the anode is
negative).
Inverse voltage/ reverse voltage
60-cycle AC
Inverse voltage/ reverse voltage
In reverse voltage, how my pulses of x-rays emitted every second and duration?
60 pulses and 1/120 sec
