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