area of x-ray tube target actually being bombarded with filament electrons

positive end of the tube that provides the target for electron interaction to produce x-rays

phenomenon resulting from angling of the target face that causes intensity of the x-ray beam to be less on the anode side because o the "heel" of the target is in the path of the beam

negative end of the x-ray tube and source of electrons

the x-ray beam area as seen from the perspective of the patient

coil of wire, usually 7-15 mm long and 1-2 mm wide, and usually made of tungsten with 1% to 2% thorium added

metal shroud that is made of nickel and surrounds the x-ray tube filaments on their back and sides, leaving the front open and facing the anode target

a measure of the amount of heat stored in a particular device

an electric motor in which the shaft is rotated through mutual induction

photons produced in the x-ray tube that are traveling in directions other than toward the patient

a principle that states by angling the face of the anode target a large actual focal spot size can be maintained and a small effective focal spot size can be created

a lead-lined metal structure that provides solid, stable mechanical support and serves as an electrical insulator and thermal cushion for the x-ray tube

a part of an induction motor made of an iron core (iron bars embedded in the copper shaft) surrounded by coils and located in the center of the stators

cloud of electrons formed by the focusing cup as electrons are boiled off the filament

self-limiting factor caused by the space charge reaching a size commensurate with the current used and making it difficult for additional electrons to be emitted

part of an induction motor made up of electromagnets arranged in pairs around the rotor

a thinned section of the x-ray tube enclosure that is the desired exit point for the x-rays produced

the literal boiling off of electrons from a filament by a flow of electrical current

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Imaging Chapter 5

X-ray Tube

Term	Definition
actual focal spot	area of x-ray tube target actually being bombarded with filament electrons
anode	positive end of the tube that provides the target for electron interaction to produce x-rays
anode heel effect	phenomenon resulting from angling of the target face that causes intensity of the x-ray beam to be less on the anode side because o the "heel" of the target is in the path of the beam
cathode	negative end of the x-ray tube and source of electrons
effective focal spot	the x-ray beam area as seen from the perspective of the patient
filament	coil of wire, usually 7-15 mm long and 1-2 mm wide, and usually made of tungsten with 1% to 2% thorium added
focusing cup	metal shroud that is made of nickel and surrounds the x-ray tube filaments on their back and sides, leaving the front open and facing the anode target
heat units	a measure of the amount of heat stored in a particular device
induction motor	an electric motor in which the shaft is rotated through mutual induction
leakage radiation	photons produced in the x-ray tube that are traveling in directions other than toward the patient
line-focus principle	a principle that states by angling the face of the anode target a large actual focal spot size can be maintained and a small effective focal spot size can be created
protective housing	a lead-lined metal structure that provides solid, stable mechanical support and serves as an electrical insulator and thermal cushion for the x-ray tube
rotor	a part of an induction motor made of an iron core (iron bars embedded in the copper shaft) surrounded by coils and located in the center of the stators
space charge	cloud of electrons formed by the focusing cup as electrons are boiled off the filament
space-charge effect	self-limiting factor caused by the space charge reaching a size commensurate with the current used and making it difficult for additional electrons to be emitted
stator	part of an induction motor made up of electromagnets arranged in pairs around the rotor
target window	a thinned section of the x-ray tube enclosure that is the desired exit point for the x-rays produced
thermionic emission	the literal boiling off of electrons from a filament by a flow of electrical current

Created by: setelinea

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