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DENT 3.2
ROENT
1-2
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Cards (98)
FATHER OF RADIOGRAPHY
Wilhelm Conrad Roent
(November 8, 1895)
kVp indicator
(
KilovoltagePeak
)
Controls or it shows the
highest point of which x-rays are produced
kVp indicator for dental radiographs
60-90
kVp
controls the length of time
timer
mA regulator range for dentak x-ray machines
8-12
mA or
10-15
mA
Allows the movement or adjustment of the tubehead
towards the area to be radiographed, extend the control panel to the tubehead
EXTENSION ARM
A tightly sealed, heavy metal housing that contains the x-ray tube that produces dental x-rays
TUBEHEAD
Contains the angulations that were used in
taking a radiograph. It has a
5-degree
angulation
NUMBER
SCALE
The tubehead and the cone is positioned
parallel to the ground
ZERO ANGULATION
The tubehead and PID is pointing downward
POSITIVE ANGULATION
The tubehead and PID is pointing upward
NEGATIVE ANGULATION
MELTING POINT OF TUNGSTEN
3410
degrees Celsius
Helps produce x-ray even with the production of heat
TUNGSTEN
Metal that absorbs heat during x-ray production
COPPER
The heart of the x-ray generating system
XRAY TUBE
a lead-line structure or metal body that
surrounds your tubehead; protects the x-ray tube
METAL HOUSING
absorbs heat produced during x-ray production
INSULATING OIL
/
GAS
Direct x-ray beam to the area to be radiographed
PID
(
POSITION INDICATING DEVICE
)
It restricts and controls the size of the x-ray beam
LEAD
COLLIMATOR/
LEAD
DIAPHRAGM
It restricts and controls the size of the x-ray beam
LEAD
COLLIMATOR/
LEAD
DIAPHRAGM
These are layers of aluminum that
functions to absorb low energy forms of radiation that are produced during x-ray production
ALUMINUM DISKS
This is the only part in the x-ray tubehead that does not have lead
TUBEHEAD SEAL
allows x-rays that were produced in the x-ray tubehead to exit your machine
TUBEHEAD SEAL
Functions to bring the incoming
voltage of 110 or 220 volts to 60,000-90,000 or 100,000
volts.
STEP-UP TRANSFORMER
Adjusts the incoming voltage of
110 or 220 volts to just 7-10 volts
STEP DOWN TRANSFORMER
Adjusts the voltage incase there are fluctuations of incoming power
AUTO TRANSFORMER
prevents x-rays from escaping in all direction
LEADED GLASS
HOUSING
/
LEADED-GLASS VACUUM
Unleaded glass window is made of what metal
BERRYLIUM
• The only portion of your leaded glass housing that does not contain lead
• It allows x-rays produced by the x-ray tube to exit the x-ray tube
UNLEADED GLASS WINDOW
At the cathode, tungsten will release electrons needed for x-ray the production
TRUE
o Produces the electrons when heated
o Where energy or electrons are produced.
TUNGSTEN FILAMENT
o “focusing cup”
o Where the tungsten filament is embedded
o Concave structure that focuses or directs
electrons produced by the tungsten filament
towards the anode, specifically the tungsten
target
MOLYBDENUM CUP
ANODE
>right side
>positive electrode or positive side of the x-ray tubehead
direction of the flow of x-ray production
(
negative
to
positive
)
CATHODE
>left side
negative electorde on the x-ray tubehead
where. tungstem [plate/ target is embedded; absorbs heat
COPPER STEM
where the energy of the electrons coming
from the cathode is converted into x-rays; focal spot/ focal plate
TUNGSTEN TARGET
/
PLATE
Stationary Anode
o Focal spot (focal: meaning “steady”)
o Used in dental x-ray machines
Rotating Anode
o Focal track
o Used in bigger machines (for orthodontic
treatment, skull x-ray)
The actual focal spot size is bigger than the effective focal spot size.
TRUE
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