3 requirements for NJ State Dental Radiology Technology exam correct answers 18 years old
high school diploma or equivalency (GED)
NJ State approved 45 hour course including required hours of clinical practice
Who discovered x-rays? correct answers Dr. Wilhelm Conrad Roentgen
aka: Wilhelm V...
3 requirements for NJ State Dental Radiology Technology exam correct answers 18
years old
high school diploma or equivalency (GED)
NJ State approved 45 hour course including required hours of clinical practice
Who discovered x-rays? correct answers Dr. Wilhelm Conrad Roentgen
aka: Wilhelm VonRoentgen
When was x-rays discovered? correct answers 1895
Who was Dr. Otto Walkoff? correct answers German dentist in 1896; first to use x-rays
for dental
Who was Dr. Edmund Kells? correct answers first American dentist to use x-rays
Who was Cyzinski? correct answers developed the bisecting angle technique
What are x-rays? correct answers electromagnetic radiation (EMR)
What determines the penetrating power of various EMR? correct answers wavelength
What do medical EMR rays fall under? correct answers gamma rays
Principle characteristics of EMR(4): correct answers ~travels at speed of light(186,000
miles/second)
~pure energy- no mass or weight
~travels through space in wave motions
~electric and magnetic fields surround them as they travel through space
What are wavelengths? correct answers distance between successive peaks along a
wave
What is frequency? correct answers oscillations emitted per second
What are oscillations? correct answers number of wavelengths
shorter wavelengths have correct answers higher frequencies and more penetrating
rays
What are red rays? correct answers Longest wavelengths in visible spectrum
, What are violet rays? correct answers shorter wavelengths
What are invisible rays? correct answers shortest wavelength, beyond the visible
threshold
ex: x-rays
The angstrom unit is used to measure... correct answers wavelength
one hundred millionth of a centimeter
x-rays used in dentistry fall between what angstrom units correct answers .5-1
angstrom unit
What is hard radiation? correct answers x-rays of shorter wavelength, used in dentistry
What is soft radiation? correct answers x-rays of longer wavelength, can't penetrate
tissues
When is EMR produced? correct answers when electrons strike a metal target in a
vacuum tube
Cathode correct answers negatively charged component which contains a filament wire
coil made of tungsten metal
Anode correct answers Positively charged component containing a target made of
tungsten metal (aka a Wolfram target)
Focal spot correct answers the small area on the target of the anode where electrons
are directed
Focusing cup correct answers negatively charged metal cup directs electrons to the
target
made of molybdenum
aperture/porte correct answers opening in x-ray tube for exit of photons
copper stem heat radiator correct answers passes electrons that turned into heat into
oil bath to be cooled
High Voltage Circuit correct answers kVp- connected to the anode and cathode
kVp- 3 things it does correct answers kilovolt peak
1000 volts
~determines anode is positive and cathode is negative
~regulates speed of electrons
~controls quality of x-ray beam
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