CT TEST REVIEW ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS

CT TEST REVIEW ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Which is NOT a synonym for the preliminary/localizer image taken at the start of a CT examination? A. Topogram B. Scout C. Scanogram D. Spiral - Answer -D. Spiral The ability of a system to differentiate, on the image, objects with similar densities is known as: A. High contrast resolution B. Low contrast resolution C. Spatial resolution D. Temporal resolution - Answer -B. Low contrast resolution Each two dimensional square of data that make up the CT image is called a: A. PixelB. Voxel C. Matrix D. Fragment - Answer -A. Pixel How many pixels are contained in a 1,024 matrix image? A. 1,024 B. 2,048 C. 262,144 D. 1,048,576 - Answer -D. 1,048,576 Beam attenuation can be defined as: A. The phenomenon by which artifacts result when lower energy photons are preferentially absorbed, leaving only higher-intensity photons to strike the detector array. B. Xray energy that is produced from bombarding a substance with fast moving electrons. C. The ability of the detector to capture transmitted photons and change them to electronic signals. D. The phenomenon by which an xray beam passing through a structure is decreased in intensity or amount because of absorption and interaction with matter. - Answer -D. The phenomenon by which an xray beam passing through a structure is decreased in intensity or amount because of absorption and interaction with matter. Which of the following is a low attenuation structure: A. Iodine filled aortaB. Rib C. Trachea D. Calcified arteries - Answer -C. Trachea An object is slightly less dense than water. What is the expected hounsfield measurement? A. -940 B. -10 C. 50 D. 850 - Answer -B. -10 Why does the administration of iodinated contrast media result in an enhanced image? A. Iodinated contrast material increases the ability of the enhanced structure to attenuate the xray beam. B. Iodinated contrast material decreases the average photon energy of the xray beam; therefore more photo