Create an account
Actual Focal Point
the area of the focal spot consisting of coiled wire that is perpendicular to the surface of the target
a positively charge electrode that acts as a target for the electrons from the cathode. Electrons interacting with the anode produce heat and x-rays
a phenomenon in which metal deposits on the inner wall of the envelope act as a secondary anode, thereby attracting electrons from the cathode.
provides a variable yet predetermined voltage to the high-voltage step-up transformer. It acts as the kilovoltage selector
Effective Focal Spot
the area of the focal spot that is visible through the x-ray tube window and directed toward the x-ray film
part of a lower-energy circuit in the cathode that, when heated, releases electrons from their orbit
creates an almost constant electrical potential across the x-ray tube, converting the positive electrical current pulses to 120 times per second compared with the normal rate of 60 times per second
a method of converting alternating to direct current in which half of the current is lost
a decrease of x-ray intensity on the anode side of the x-ray beam caused by the anode target angle
the amount of electrical energy being applied to the anode and cathode to accelerate the electrons from the cathode to the anode
the effect of making the actual focal spot size appear smaller when viewed from the position of the film because of the angle of the target to the electron stream
adjusts the incoming line voltage to the autotransformer so that the voltage remains constant
the amount of electrical energy being applied to the filament. Milliamperage describes the number of x-rays produced during the exposure.
a metal commonly used in focusing cups because of its high melting point and poor conduction of heat
reduces the x-ray machine input voltage from 110 to 220 V to thousands of volts (i.e kilovolts)
a mechanism consisting of an anode and a cathode in a vacuum that produces a controlled x-ray beam
The anode's target
is composed of tungsten
reaches temperatures in excess of 1000C during x-ray production
usually has a copper base
How can the technician help to prolong the life of the filament in the x-ray tube
enter the proper exposure settings in the control panel before the final positioning of the animal
Which of the following are possible effects of excessive heat within an x-ray tube
bearing failure and decreased anode speed
roughened target surface
Veterinary patients have a tendency to move while being positioned for radiographs to be taken. The radiographer should help to safely prevent artifacts of movement by
using the shortest exposure time possible
Recommendation to reduce unnecessary irradiation of the patient or persons restraining the patient and to decrease scatter radiation
adjustment of the collimator so that the smallest field size possible is used
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together