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Stack #470470
Tammara Crawn -Davis
Question | Answer |
---|---|
The fundamental particles of an atom are? | electron, proton and neutron. Busong, p 40 |
True or False, roentgen (GYa) is the unit of radiation exposure or intensity, rad(GYt) is the unit of radiation abosorbed dose, rem (Sv) if the unit of occupational radiation exposure? | True, Buhsong p. 34,35 |
True or False, Patients who require assistance during a radiography should be held by radiography personnel? | Fals. When necessary a member of the patients family should provide assistance. Bushong p.12 |
Always practice _______ to keep radiaton exposure low | ALARA , As Low As Reasonably Achievable bushong p.12 |
In fluorography the x-ray tube is located where? | Under the examination table . Bushong p8 |
Ionizaton is the removal of an ______________ from an atom? | electron Bushong p. 5 |
True or False, Energy is the ability to do work? | True. Bushong p. 4 |
The maximum number of electrons that can occupy the out shell is? | 8. Bushong p.43 |
Tungsten has an atomic z number? | 74. Bushong p46 |
Velocity, wavelength and frequency are , proportional or inversely proportional? | inversely proportional. bushong p. 59 |
for a given technique the x-ray intensity at 1m is 450 mR. What is the intensity at a distance of 3 m? | 50 mR . Bushong p 67 |
Electric potential is measured in _______ and Electric resistance is measured in _________. | Volts (V) , ohms . Bushong p. 79 |
A ____________ is any substance through which electrons flow easily and a ___________ is any material that does not allow elctrons to flow? | conductor, insulator. Bushong p.78 |
Current that oscillate back and forth is called________________ and current that flows in one direction is called____________. | Alternating AC, Direct Current (DC). Bushong p. 81 |
X-ray imaging system has three principle parts what are they? | x-ray tube, operating console, high-voltage generator. Bushong p 103 |
True or False, the autotransformer supplies precise voltage to the filament circuit. | True, bushong p.104 |
KVp or maS determines the quality of the x-ray beam? | KVp. bushong p.106 |
An x-ray tube requires direct current (DC), what device is required to convert AC to DC? | a Rectifier. Bushong p. 110 |
What is the most common cause of tube failure? | From deposits cause from tungesten vaporizatio on the inside of the glass enclosure of the x-ray tube. Bushong p.122 |
The cathode has two primary parts, what are they? | A filament and focusing cup. p. 122 |
General purpose x-ray tubes use which type of anode; rotating or stationary? | rotating, . ( higher tube currents and shorter exposure times are possible with rotating anode. bushong p. 125 |
True or False, appoximatley 99% of projectile electron kinetic energy is used for the production of x-ray. | False. 99% of the kenetic enery of projectile electron is converted to heat. Approximatley 1% is used for x-ray. Bushong p.140 |
In diagnostic range most x-rays are; brems or characteristic radiation? | Brems. bushong p.143 |
Does added filtration increase or decrease x-ray quantity? | decrease quantity. p.147 |
what are the three types of filtration? | Inherent, Added, compensating filter. Bushong p.157 |
what are the 5 x-rays interaction with matter? | Coherent scattering, compton effect, photoelectric effect , pair production, photodisintegration. p. 163 |
true or false, compton scattering reduces image contrast? | true. p. 165 |
Is abpsorption or attentuation an all or none conditon of x-ray interaction? | absorption. attentuation is the product of absorption and scattering. Bushong p 175 |
Cones are used for daylight vision and are called ________________, and rods are used for night vision and are called________________. | Photopic vision, scotopic vision. p.348 |
The ability of the image intensifier to increase the illumination level of the image is called? | brightness gain. p.351 |
A reduction in brightness of the periphery of an image is called? | vignetting. p.352 |