LRA 211 Radiology: Questions & Answers
Who discovered x-rays - ANSWER:wilhelm Conrad Roentgen 1895
Who made the first dental radiograph - ANSWER:Otto walkoff
Dr. C. Edmund Kells - ANSWER:Credited with the first practical use of radiograph in dentistry
Energy - ANSWER:Defined as the ability to do work
Matter - ANSWER:Anything that occupies space and has form or shape
Electrons - ANSWER:Are tiny negatively charged particles that have very little mass
Ionization - ANSWER:Is the process by which electrons are removed from the orbital shells of electrical
stable Atoms through collisions with x-ray photon
shorter wavelength - ANSWER:High frequency
High energy of short wavelengths - ANSWER:Are able to penetrate matter more easily
Long wavelength - ANSWER:Low frequency
Three primary components of an x-ray machine - ANSWER:The tubehead, An extension arm, The control
panel
Lead collimator - ANSWER:A metal disc with a small opening in the center to control the size and shape
of the x-ray beam as it leaves the tubehead
Insulating oil & tungsten target - ANSWER:Two things that remove heat
Control panel of an x-ray unit contains - ANSWER:The master switch, Indicator light, Exposure button,
Control devices (time,milliamperage[mA]selector, and kilovoltage [kV]selector)
Cathode - ANSWER:Electrons are generated in the x-ray tube at the cathode
the Anode - ANSWER:Is the target for the electrons and It is composed of tungsten target a small block
of something that is embedded in the large copper stem.
The copper around the target - ANSWER:conducts the heat a way from the target, thus reducing wear
and tear on the target
Rectangular PID - ANSWER:Limits the size of the beam
The long 12 to 16 inch PID - ANSWER:More effective in reducing exposure To the patient than a short 8
inch PID
Extension arm - ANSWER:folds up and can be swiveled from side to side
The aluminum filter - ANSWER:Removes the longer wavelength x-rays
Primary x-ray - ANSWER:Is the x-rays that come from the target of the x-ray tubes
Who discovered x-rays - ANSWER:wilhelm Conrad Roentgen 1895
Who made the first dental radiograph - ANSWER:Otto walkoff
Dr. C. Edmund Kells - ANSWER:Credited with the first practical use of radiograph in dentistry
Energy - ANSWER:Defined as the ability to do work
Matter - ANSWER:Anything that occupies space and has form or shape
Electrons - ANSWER:Are tiny negatively charged particles that have very little mass
Ionization - ANSWER:Is the process by which electrons are removed from the orbital shells of electrical
stable Atoms through collisions with x-ray photon
shorter wavelength - ANSWER:High frequency
High energy of short wavelengths - ANSWER:Are able to penetrate matter more easily
Long wavelength - ANSWER:Low frequency
Three primary components of an x-ray machine - ANSWER:The tubehead, An extension arm, The control
panel
Lead collimator - ANSWER:A metal disc with a small opening in the center to control the size and shape
of the x-ray beam as it leaves the tubehead
Insulating oil & tungsten target - ANSWER:Two things that remove heat
Control panel of an x-ray unit contains - ANSWER:The master switch, Indicator light, Exposure button,
Control devices (time,milliamperage[mA]selector, and kilovoltage [kV]selector)
Cathode - ANSWER:Electrons are generated in the x-ray tube at the cathode
the Anode - ANSWER:Is the target for the electrons and It is composed of tungsten target a small block
of something that is embedded in the large copper stem.
The copper around the target - ANSWER:conducts the heat a way from the target, thus reducing wear
and tear on the target
Rectangular PID - ANSWER:Limits the size of the beam
The long 12 to 16 inch PID - ANSWER:More effective in reducing exposure To the patient than a short 8
inch PID
Extension arm - ANSWER:folds up and can be swiveled from side to side
The aluminum filter - ANSWER:Removes the longer wavelength x-rays
Primary x-ray - ANSWER:Is the x-rays that come from the target of the x-ray tubes
