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RADT 465-Eqpmnt/QC

ARRT registry review covering equipment operation and quality control

QuestionAnswer
How much of the total energy created during an exposure results in x-rays and what is the remaining energy that does not produce x-rays converted to? Less than 1% of the energy produced during an exposure results in x-rays. The majority of the energy, over 99%, is converted to heat. (Lange Q&A, 10th ed, Pg. 275)
What type of transformer is used to increase voltage to kilovoltage? A high-voltage or step-up transformer. (Lange Q&A, 10th ed, Pg. 275)
What is the formula could be used to find the secondary voltage in a step-up transformer? (e.g. Transformer Law/Equation/Formula) ((V(s) / V(p)) = ((N(s) / N (p)) : Where V(s) is the secondary voltage, V(p) is the primary voltage, N(s) is the secondary number of turns, and N(p) is the primary number of turns. (Lange Q&A, 10th ed, Pg. 275)
Which generator is considered to be the most efficient and what is it's voltage ripple? (single phase, three phase six pulse, three phase twelve pulse, or high-frequency) High-frequency generators are considered to be the most efficient and have a voltage ripple of less than 1%. (Lange Q&A, 10th ed, Pg. 276)
What is thermionic emission? The "boiling off" of electrons from the filament. (Lange Q&A, 10th ed, Pg. 276)
What is rectification? The process of changing alternating current to direct current. (Lange Q&A, 10th ed, Pg. 276)
In fluoroscopy, this adjusts the mA and kV to account for changes in the thickness and tissue density of various parts of the body. ABC- Automatic Brightness Control (Lange Q&A, 10th ed, Pg. 277)
What is the difference between a generator and a motor? A generator converts mechanical energy into electrical energy and a motor converts electrical energy into mechanical energy. (Lange Q&A, 10th ed, Pg. 278)
What is the purpose of the line-voltage compensator in the x-ray circuit? The line-voltage compensator automatically adjusts the incoming voltage to the correct level of voltage to run the x-ray machine. It adjusts for drops and surges in the voltage level entering the machine. (Lange Q&A, 10th ed, Pg. 278)
What QC device is used to test focal-spot size? A slit camera, star pattern, or pinhole camera. (Lange Q&A, 10th ed, Pg. 278)
(T/F) The cathode side of the x-ray tube is positively charged and the anode side is negatively charged. False: The cathode side of the x-ray tube is negatively charged and the anode side has a positive charge. (Lange Q&A, 10th ed, Pg. 279)
(T/F) Autotransformers use self-induction. True (Lange Q&A, 10th ed, Pg. 281)
(T/F) Quality Assurance deals with equipment and its safe and accurate operation. False: Quality Control deals with equipment and it's safe and accurate operation. Quality Assurance deals with patient and staff satisfaction. (Lange Q&A, 10th ed, Pg. 281)
What is inherent filtration and what is an example of it? Inherent filtration is filtration that is built in to the housing of the x-ray tube. The window of an x-ray tube acts as inherent filtration. (Lange Q&A, 10th ed, Pg. 282)
(T/F) The kV meter is located on the high voltage side of the x-ray circuit. False: The kV meter is located on the low voltage side of the x-ray circuit. (Lange Q&A, 10th ed, Pg. 283)
What is used to test the timer accuracy in single phase equipment? Spinning-Top Test (Lange Q&A, 10th ed, Pg. 284)
Within what radiation output range should equipment fall into in order to pass the reproducibiliy test? Radiation output should be consistent within +/- 5% (Lange Q&A, 10th ed, Pg. 284)
What is current? The amount of electric charge flowing per second. (Lange Q&A, 10th ed, Pg. 286)
What is voltage? The potential difference between two points. (Lange Q&A, 10th ed, Pg. 286)
What are the two interactions that produce diagnostic quality x-rays? Bramstrahlung and Characteristic. (Lange Q&A, 10th ed, Pg. 286)
Created by: rmhale