ARRT CT Certification Exam Question with complete solution 2023/2024

ARRT CT Certification Exam Question with complete solution 2023/2024What is the Z-axis? - correct answer Determines the thickness of the cross-sectional slice. What does 'X' indicate? - correct answer Width What does 'Y' indicate? - correct answer Height Hounsfield Units - correct answer Quantify the degree that a structure attenuates an x-ray beam. -1000 (air) / 0 water) / 1000 (dense bone) The X-ray beam used in CT is? - correct answer Polychromatic (beam has photons of varying energies). What are the benefits of filtering x-ray beams? - correct answer 1) Improves image quality (filters low energy photons that cause artifacts). 2) Reduces dose to the patient. Volume averaging (Partial volume effect) - correct answer Different tissue attenuations are averaged to produce one less accurate pixel reading (thinner slices = decreased volume averaging). How are x-rays created? - correct answer When a substance is bombarded by fast moving electrons.