Tube arcing
Disclosures
- updated 4 Sep 2022:
Nothing to disclose
Updates to Article Attributes
Body
was changed:
Tube arcing occurs when there is a short-circuit within the tube, typically from the cathode to the tube envelope. The result is a temporary loss of x-ray output and a localizedlocalised artifact.
A number of causes of tube arcing are recognizedrecognised 1:
- insulator surface flashover
- insulator breakdown
- vacuum flashover
- most common
- due to particulate impurities or gas within the tube
- new tubes are more prone to this problem due to residual gas
A small amount of tube arching is not uncommon and modern scanners have automated processes to remove the artifact from the final images 1,2.
-<p><strong>Tube arcing</strong> occurs when there is a short-circuit within the tube, typically from the cathode to the tube envelope. The result is a temporary loss of x-ray output and a localized artifact. </p><p>A number of causes of tube arcing are recognized <sup>1</sup>: </p><ol>-<li>insulator surface flashover</li>-<li>insulator breakdown</li>-<li>vacuum flashover<ul>-<li>most common</li>-<li>due to particulate impurities or gas within the tube</li>-<li>new tubes are more prone to this problem due to residual gas</li>-</ul>-</li>- +<p><strong>Tube arcing</strong> occurs when there is a short-circuit within the tube, typically from the cathode to the tube envelope. The result is a temporary loss of x-ray output and a localised artifact. </p><p>A number of causes of tube arcing are recognised <sup>1</sup>: </p><ol>
- +<li>insulator surface flashover</li>
- +<li>insulator breakdown</li>
- +<li>vacuum flashover<ul>
- +<li>most common</li>
- +<li>due to particulate impurities or gas within the tube</li>
- +<li>new tubes are more prone to this problem due to residual gas</li>
- +</ul>
- +</li>
Unable to process the form. Check for errors and try again.