ARRT Radiography Exam Review Q&A Study Guide

A ________ is used to measure radiation in an area, storage areas for radioisotopes, doses traveling through barriers, and patients who have radioactive sources within them. Handheld Ionization Chamber Handheld ionization chambers can measure exposure rates as low as ________ per hour. 10 µGyᵃ A ________ is used to detect radioactive particles in nuclear medicine facilities. Geiger-Mueller Detector Geiger-Mueller detectors read in ________ per minute. Counts An autotransformer is also known as a ________ transformer. Variable An autotransformer is constructed with: A single coil of wire with an iron core. The autotransformer is the source for selecting ________. kVp Autotransformers operate on the principle of ________. Self-Induction The ________ is in the x-ray circuit to indicate the voltage that is selected. Prereading Voltmeter The prereading voltmeter is prereading because it indicates the ________ that will be flowing through the tube once the exposure is made. Kilovoltage The prereading voltmeter is placed in the circuit between the ________ and the ________. 1) Autotransformer 2) Step-Up Transformer A ________ is used to regulate the duration of the x-ray exposure. Timer The timer is wired in the circuit between the ________ and the ________. 1) Autotransformer 2) Step-Up Transformer Electronic timers allow exposures as low as ________. 1 ms or 1/1000 second.