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Frequency and wavelength are _____ related.
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What type of radiation is it when an electron ejects a K-shell tungsten electron?
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Equ. Oper. & QC
| Question | Answer |
|---|---|
| Frequency and wavelength are _____ related. | inversely (Lange Radiography Prep Book, pg. 439) |
| What type of radiation is it when an electron ejects a K-shell tungsten electron? | characteristic (Lange Radiography Prep Book, pg. 438) |
| What type of radiation is it when an electron enters the nucleus of an atom and slows down, releasing an x-ray photon? | bremsstrahlung (Lange Radiography Prep Book, pg. 437) |
| What is the law that states a magnetic field will induce an electric current in a conductor if there is motion of the magnetic field or the conductor? | Faraday (Lange Radiography Prep Book, pg. 445) |
| What is the job of the auto-transformer? | sends the correct amount of of voltage to the primary of the high voltage transformer to be stepped up to a kilo voltage level (Lange Radiography Prep Book, pg. 447) |
| What type of induction does the autotransformer operate on? | self- induction (Lange Radiography Prep Book, pg. 448) |
| What is the job of rectifiers? | changes the non-useful negative half-cycle to a useful positive half-cycle (Lange Radiography Prep Book, pg. 448) |
| What percent of wave ripple does a 3 phase 6 pulse rectifier produce? | 13 (Lange Radiography Prep Book, pg. 449) |
| What percent of wave ripple does a 3 phase 12 pulse rectifier produce? | 3-4 (Lange Radiography Prep Book, pg. 449) |
| What percent of wave ripple does a high frequency rectifier produce? | <1 (Lange Radiography Prep Book, pg. 449) |
| The boiling off of outer shell electrons from the cathode end is called what? | thermionic emission (Lange Radiography Prep Book, pg 451) |
| Why is tungsten the target material of choice for the anode? | high atomic number, high melting point, thermal conductivity (heat dissipation) (Lange Radiography Prep Book, pg. 452) |
| What percent of kinetic energy of the electron stream is converted into x-rays? | 0.2 (Lange Radiography Prep Book, pg. 453) |
| What does the line-focus principle state? | the effective focal spot is actually smaller than the actual focal spot (Lange Radiography Prep Book, pg. 455) |
| What is the job of filters? | reduce patient dose and remove low energy photons (Lange Radiography Prep Book, pg. 455) |
| What is the job of the backup timer? | protect patient from unnecessary radiation if the AEC fails to operate (Lange Radiography Prep Book, pg. 462) |
| What QC test should be used to test for timer accuracy? | spinning top test (Lange Radiography Prep Book, pg. 462) |
| What is bit depth? | number of bits per pixel & determines gray scale (Lange Radiography Prep Book, pg. 466) |
| Digital image resolution improves with what? | smaller pixels, smaller pixel pitch, large matrix (Lange Radiography Prep Book, pg. 469) |
| What is the PSP made of? | europium-activated barium fluorohalide mixed with binder substance (Lange Radiography Prep Book, pg. 471) |
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