X-Ray Tube
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 1. The most widely used support structure for the x-ray tube is the... | show 🗑
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| show | glass envelope
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| 3. The negative side of the x-ray tube holds the ... | show 🗑
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| 4. What is the most common cause of tube failure? | show 🗑
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| 5. The target of the rotating anode is usually coated with a ________ alloy. | show 🗑
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| show | focal spot
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| 7. High capacity tube rotors revolve at ______. | show 🗑
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| show | heel effect
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| show | long exposure times
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| show | filaments
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| show | maximum exposure time
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| show | stators
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| show | anode angle
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| 14. The effective focal spot size is _____ the actual focal spot size. | show 🗑
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| 15. Localized pitting or cracking on the anode can occur from ... | show 🗑
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| show | outer-shell excitation
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| show | tube current
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| 18. Approximately _____% of the kinetic energy of the projectile electrons is converted to x-rays at the target. | show 🗑
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| 19. Electron interations at the inner shell of the target atoms produce _____ radiation. | show 🗑
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| 20. The useful characteristic x-rays from tungsten targets are _____(shell) x-rays. | show 🗑
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| show | bremsstrahlung
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| 22. At 55 kVp ____% of the x-rays produced are bremsstrahlung. | show 🗑
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| 23. Bremsstrahlung x-rays are produced by _____ at the target. | show 🗑
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| show | released binding energy
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| show | 100
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| 26. An increase in mAs would (increase or not affect) the (amplitude or position) of the emission spectrum. | show 🗑
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| show | target material
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| 28. How does added filtration affect the emission spectrum? (increased or reduced amplitude) and (shift to right or left) | show 🗑
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| show | quantity
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| show | 5 mR/mAs
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| 31. If filter thickness is _____, then x-ray intensity is _____. (increased or reduced) and (increased or reduced). | show 🗑
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| 32. If x-ray quantity is doubled, the optical density on the finished radiograph will be ... (reduced by half, just slightly increased or increased by a factor of two) | show 🗑
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| show | double, double
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| show | 100
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| 35. If an exposure is 50 mR at an SID of 40 inches, what would the exposure be at an SID of 60 inches? | show 🗑
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| 36. An x-ray beam that could pass through dense tissue would have high ____. (penetrability, quality or quantity). | show 🗑
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| 37. A low quality beam would also have low ... (penetrability, quantity, mAs or intensity). | show 🗑
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| 38. Image contrast is affected by ... (beam quality, kVp or mAs). | show 🗑
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| 39. Added filtration will ____ beam quality and ____ beam quantity. (decrease or increase) both lines. | show 🗑
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| 40. The scattered x-ray from a Compton interaction usually retains ____ of the energy of the incident photon. (none, little, most, all) | show 🗑
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| 41. Compton scatter is directed at ____ degrees angle from the incident beam. (0, 180, 90, any) | show 🗑
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| show | photodisintergration
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| show | increased, increased
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| 44. Because of differential absorption, about ___% of the incident beam from the x-ray tube contributes to the finished image. | show 🗑
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| 45. Attenuation is caused by ___. (absorption, scattering or transmission) | show 🗑
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| 46. Barium is a good contrast agent because of its... | show 🗑
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| show | All of them
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| show | air
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| show | the radiographic image
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| 50. If 5% of an incident beam is transmitted through a body part, then 95% of that beam was ... (scattered, attenuated, absorbed or back-scattered) | show 🗑
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