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RADT: 465 QC

ARRT registry review covering equipment content area.

QuestionAnswer
What is the source of electrons in the x-ray tube? Heated Cathode. Radiography Prep. pg. 437
Define Bremsstrahlung? Slowing of high speed electrons, transfers energy into x-rays. Radiography Prep. pg. 437
What percentage of radiation does Brem. make up? 70-80% of x-ray bean. Radiography Prep. pg. 438
Define Characteristic radiation? High speed electron encounters atom and ejects a K shell electron. Radiography Prep. pg. 438
Define wavelength? The distance between two consecutive wave crests. Radiography Prep. pg. 439
Define Frequency? The number of cycles per sec. Radiography Prep. pg. 439
What is frequency measured in? Hertz. Radiography Prep. pg. 439
Define Photoelectric effect? Low energy x-ray photon ejects an inner shell electron and that spot is filled by an outer shell electron. Radiography Prep. pg. 440
Define Compton scatter? High energy x-ray photons eject outer shell electron. Radiography Prep. pg. 440
T/F Coherent scatter is often used in diagnostic radiology? False. Radiography Prep. pg. 441
T/F radiations from the electromagnetic spectrum all travel at the same velocity but different wavelengths? True. Radiography Prep. pg. 441
T/F Wavelength and Frequency are directly related? False. Radiography Prep. pg. 441
Give an example of fixed radiography equipment? Fluoroscopy. Radiography Prep. pg. 442
Define amplitude? Height of the wave. Radiography Prep. pg. 444
T/F x-ray transformers operate on the principle of mutual induction? True. Radiography Prep. pg. 446
Equation for autotransformer and transformer laws? Ns/Np=Ip/Is, Vs/Vp=Ns/Np
Step-down transformers are also called what? Filament transformers. Radiography Prep. pg. 448
What is the positive electrode? Anode. Radiography Prep. pg. 451
What is the negative electrode? Cathode. Radiography Prep. pg. 451
What are the three portions of the x-ray circuit? Primary, secondary, and filament circuits. Radiography Prep. pg. 465
Created by: nwbatz