When were x-rays discovered? - November 8, 1895 in Germany
What are the 3 Cardinal Principals of radiation protection? - Maximize distance,
maximize shielding, minimize time
What is Erythema? - Reddening of the skin
What is Anemia? - Decrease of oxygen in blood, low blood count
What is Leukopenia? - Low WBC count
What is epilation? - Loss of hair
What does ALARA stand for? - As Low As Reasonably Achievable
What is collimation? - Limits the size/area of the x-ray beam
What is a proton? - Positively charged, in nucleus of atom
What is a neutron? - No electrical charge, in nucleus of atom
What is a electron? - Negatively charged, in orbital shell around nucleus of an atom
What is an ion? - A charged particle
What is ionization? - Process of an electron leaving its orbit around a neutral atom
What is an ion pair? - An electron and a positive charged atom
What does isotropic mean? - Equal in all directions
What is energy? - The ability to do work
What is mass? - The quantity of matter
What is matter? - Anything that occupies space and has mass
What travels at 186,000 miles/second? - All electromagnetic radiation
Does electromagnetic radiation have mass? - No
, What has higher energy than visible light? - X-rays
What happens when x-rays are absorbed by body tissue? - Causes ionization of atoms
and molecules
Ionization can result in what type of damage? - Biological Damage
What is radioplaque? - DOES NOT go through
What is radiolucent? - Sees through
A special mechanism that stops tube movement at a specific location is? - Detent
What device receives the energy of the x-ray beam and forms the image of the body
part? - Image Receptor
What type of cassette containing film receives x-ray beam? - Film based
What is a latent image? - A hidden image
A cassette containing film receives the x-ray beam. The film now contains a latent
image and will become visible after being processed in a? - Dark room
What type of cassette containing a phosphor plate receives the x-ray beam? -
Computed Radiography
In CR, the phosphor plate will be scanned by a? - Laser
An electronic plate receives the x-ray beam and produces and electronic signal that is
sent directly to a computer for processing and digital image formation? - Direct/Digital
What prevents scatter radiation from reaching the IR? - Grid
What includes a tray to hold the IR? - Bucky
What does the collimator do? - Limits the size of the radiation field
What does transverse mean? - Movement of the x-ray tube across the patient from left
to right
What does longitudinal mean? - Movement of the x-ray tube from the foot end toward
the head end of the patient
What does vertical mean? - Movement of the x-ray tube from 30" to 40" inches about
the film
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