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RADT 465 Equip Q.C.

ARRT review covering equipment operation and quality control

QuestionAnswer
Bremsstrahlung radiation comprises __%-__% of the x-ray beam 70%-90%
A high speed electron encounters a tungsten atom within the anode and ejects a K shell electron leaving a vacancy in that shell Characteristic Radiation
the distance between two consecutive wave crests wavelength
the number of cycles per second, its unit of measurement is the hertz (Hz) frequency
Shorter wavelength is associated with: higher frequency, higher energy, increased ionizing potential
a relatively low-energy (low kv) x-ray photon uses all its energy to eject an inner shell electron, leaving orbital vacancy. an electron from the shell above drops down to fill the vacancy photoelectric effect
a fairly high energy x-ray photon ejects an outer shell electron compton scatter
converts mechanical energy to electrical energy generator
converts electrical energy to mechanical energy motor
the x-ray tube operates most efficiently on ______ current. unidirectional
basic components of the x-ray tube: anode, cathode, glass envelope
The anode is positive or negative? positive
The cathode is positive or negative? negative
The glass envelope acts as a_______. vacuum
Tungsten is usually chosen as target material because of its high ______ _______, high ______ _______, and thermal ________. atomic number, melting point, conductivity
most x-ray tubes have __ filaments two
the larger the matrix size, the ______ the image better
anything that interferes with visualization of the image noise
the x-ray circuit has three major portions: the primary side (low voltage), the filament circuit, and the secondary side (high voltage)
terminates the exposure should the AEC fail, protecting the patient from excessive exposure, prolonging the life of the x-ray tube backup timer
Created by: jkcottongim
Popular Radiology sets

 

 



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