X-ray tube components and tube failure/ tube charts
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | lead lined and surrounds the tube to prevent leakage radiation.
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| show | protects against electrical shock.
Provides mechanical support
Contains oil that serves as an electrical insulator and thermal cushion
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| Metal/Glass Envelope has two diodes, name them.. | show 🗑
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| show | to maintain a vacuum. The production of xrays would be less efficient without it because the electrons would interact with the particles in the air.
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| Gassy Tube | show 🗑
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| show | Filmanet and Focusing Cup
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| filament | show 🗑
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| show | metal cup that the filament is embedded in.
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| show | when tube is on a low current passes through filament, preparing it for an exposure.
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| Space Charge Effect | show 🗑
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| Dual Focus Tube | show 🗑
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| Benefits of small focal spot | show 🗑
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| show | used with technical factors that require a lot more xray photons. Less detail, less patient dose.
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| show | positive side of the X-ray tubes
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| show | rotating and stationary
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| show | used for general purpose X-ray tubes because of the high intensity of the xrays that are produced. Moving focal spot, less detail.
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| Stationary anode | show 🗑
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| show | electrical conductor, provides mechanical support for the target, good thermal conductor.
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| show | copper, graphite, molybdenum
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| show | tungsten
(molybdenum or rhodium for mammography)
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| Target material characteristics | show 🗑
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| show | the effective focal spot size is smaller than the actual focal spot
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| actual focal spot | show 🗑
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| effective focal spot | show 🗑
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| Anode heel effect | show 🗑
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| show | electrons bounce off of the focal tract and enter and interact with an area outside the focal tract to produce xrays
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| 3 ways heat can be dissipated at the anode | show 🗑
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| Causes of tube failure | show 🗑
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| Melting or pitting of the anode | show 🗑
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| Long exposure timers | show 🗑
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| Filament Vaporization | show 🗑
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| Cracked Anode | show 🗑
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| show | tube vacuum deteriorates allowing air molecules in causing the electrons from the cathode to interact with air molecules and decrease tube output..
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