ARRT Radiography Exam Review (300- 400)Questions And Answers

ARRT Radiography Exam Review (300- 400)Questions And Answers Elongation (body part appears longer than normal) is caused by angulation along the ________ axis of the part being imaged. - answerLong Foreshortening (body part appears shorter than normal) is caused by angulation against the ________ axis of the part being imaged. - answerMain Grids are constructed of ________ strips separated by ________ interspacers. - answer1) Lead 2) Aluminum The height of the lead strips divided by the distance between the lead strips is known as: - answerGrid Ratio Grid Ratio Formula: - answerH/D The number of lead strips in a grid per inch (or centimeter) is known as: - answerGrid Frequency The measure of the ability of a grid to increase contrast is the ________. - answerContrast Improvement Factor The ratio of primary radiation transmitted through the grid to secondary radiation transmitted through the grid is the ________. - answerGrid Selectivity Grid conversion factor (GCF) is the amount of exposure ________ necessary to compensate for the ________ of image-forming x-rays and scatter in the cleanup process. - answer1) Increase 2) Absorption Grid conversion factor is also known as: - answerBucky Factor Value How do you calculate the new mAs required for a specific grid using the grid conversion factor? - answerGCF of selected grid times the current mAs What is the grid conversion factor for a 5:1 grid? - answer2 What is the grid conversion factor for a 8:1 grid? - answer4