anode (redirected from anode-film distance)

anode /an·ode/ (an´ōd) the electrode at which oxidation occurs and to which anions are attracted.ano´dal

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Anode

The positive electrode to which an electromagnetic current flows.

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anode,

the electrode at which oxidation occurs. anodal, adj.

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anode (an´ōd),

n the electrically positive terminal of a roentgen ray (radiographic) tube; a tungsten block embedded in a copper stem and set at an angle of 20° or 45° to the cathode. The anode emits roentgen rays (radiographs) from the point of impact of the electronic stream from the cathode.

anode, rotating,

n an anode that rotates during radiograph production to present a constantly different focal spot to the electron stream and to permit use of small focal spots or higher tube voltages without overheating the tube.

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anode

the positive electrode or pole to which negative ions are attracted.

The stationary anode in an x-ray tube is a solid bar of copper with an inset of tungsten on the face of the bar opposite the cathode filament. The tungsten target has a high melting point to withstand the intense heat of the x-ray beam—the copper conducts the heat away.

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anode-film distance

see focal-film distance.

rotating anode

an x-ray tube in which the anode rotates when x-rays are being produced. This means that there is a larger effective target surface of the anode which can be available to generate x-rays.

stationary anode

a non-rotating anode in an x-ray tube so that the target surface is comparatively small.