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Equ. Oper. & QC

QuestionAnswer
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)
Created by: jmjones3
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