Focal spot
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Focal spot is the area of the anode surface which receives the beam of electrons from the cathode.
Relationship between focal spot and electron stream
Size and shape of the focal spot is determined by the size and shape of the electron beam when it strikes the anode 1.
Size and shape of the electron beam is determined by:
- dimensions of the filament tungsten coil
- construction of the focussing cup
- position of the filament in the focussing cup
The focal spot sizes commonly employed are 0.3mm, 0.6mm, 1.0mm and 1.2mm.
See also
-<p><strong>Focal spot </strong>is the area of the anode surface which receives the beam of electrons from the <a title="Cathode" href="/articles/cathode-1">cathode</a>.</p><h4>Relationship between focal spot and electron stream</h4><p>Size and shape of the focal spot is determined by the size and shape of the electron beam when it strikes the anode <sup>1</sup>.</p><p>Size and shape of the electron beam is determined by:</p><ul>- +<p><strong>Focal spot </strong>is the area of the anode surface which receives the beam of electrons from the <a href="/articles/cathode-1">cathode</a>.</p><h4>Relationship between focal spot and electron stream</h4><p>Size and shape of the focal spot is determined by the size and shape of the electron beam when it strikes the anode <sup>1</sup>.</p><p>Size and shape of the electron beam is determined by:</p><ul>
-</ul><p>The focal spot sizes commonly employed are 0.3mm, 0.6mm, 1.0mm and 1.2mm.</p>- +</ul><p>The focal spot sizes commonly employed are 0.3mm, 0.6mm, 1.0mm and 1.2mm.</p><p> </p><h4>See also</h4><ul><li><a title="Line focus principle" href="/articles/line-focus-principle">line focus principle</a></li></ul>
References changed:
- 1. Dowdey, James E., Murry, Robert C., Christensen, Edward E., 1929-. Christensen's Physics of Diagnostic Radiology. (1990) ISBN: 0812113101
Tags changed:
- shetty
Sections changed:
- Imaging Technology
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