physic CH. 6 definitions

What consist of 2 sets of perpendicular sets of ceiling mounted rails.
**most frequently used
** allows for longitudnal & transverse travel

What postition is considered to be centered above the exam table at the standard SID (source to image receptor distance)

What has a single column with rollers at each end and one attached to the ceiling rail and the other attached to the floor rail.
** xray tube slides up & down the column as the column rotates

What is a variation of the floor to ceiling support with 1 or 2 floor mounted rails.

What are ceiling mounted & provide for flexible x-ray tube positioning.
The image receptor is attached to the other end of the c-arm

Emitted with equal intensity in all directions

WHat is the thin section of a glass envelope through which the useful beam emerges

Primary radiation used to form an image

Secondary radiation emitted through the tube housing

protects the tube from damage caused by rough handling

negative side of the xray tube; contains the filament and the focusing cup

positive side of an x-ray tube that contains the target

maintain a constant electric potential between the electrons of the tube current & the enclosure therefore they have a longer life & are less likely to fail

coil of wire made out of tungsten.
* part of the cathode that emits eletrons, resulting in a tube current

emissions of electrons from a heated surface

metal shroud that surrounds the filament

xray tube designed to be turned off & on very rapidly for situations that require multiple exposures at precise exposure times

device used to reduce the intensity of scatter radiation in the remnant x-ray beam

electron cloud near the filament

Phenomenon of the space charge that makes it difficult for subsequent electrons to be emitted by the filament because of electrostatic repulsion.

filament current that has risen to its maximum valve because all available electrons have been used

region of the anode target in which electrons interact to produce x-rays

the filament embedded in a metal shroud

x-ray tube designed to be turned on & off very rapidly for situations that require multiple multiple exposures at precise exposure times

device used to reduce the intensity of scatter radiation in the remnant x-ray beam

electron cloud near the filament

phenomenom of hte space charge that makes it difficult for subsequent electrons to be emitted by the filament becuase of electrostatic repulsion

filament surrent that has risen to its maximum value because all available elctrons have been used

emission of electrons from a heated surface

anode used in imaging systems in which high tube current and power are not required

anode used in general purpose x-ray tubes because the tubes must be capable of producing high intensity x-ray beams in a short time

the region os an x-ray tube anode that is struck by electrons emitted by the filament

stationary coil winding located in the protective housing but outside the x-ray tube glass envelope

rotating part of an electromagnetic induction motor that is located inside the glass envelope

design incorportated into x-ray tube targets to allow a large area for heating while a small focacl spot is maintained

x-rays produced in the anode but not at the focal spot

energy emitted & transferred through matter

transfer of heat by molecular agitation

transfer of heat by the movement of hot matter to a colder place

Condition that results when the filament becomes thinner & breaks