The main advantages of CT over conventional radiography are
-Elimination of superimposed structures
- the ability to differentiate small differences in density of an atomic structures
- superior quality of the images
Computer tomography for technologists exam review Romans chapter 1 page 3
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ARRT CT REGISTRY PHYSICS questions and answers The main advantages of CT over conventional radiography are - answer -
Elimination of superimposed structures - the ability to differentiate small differences in density of an atomic structures - superior quality of the images Computer tomography for technologists exam review Romans chapter 1 page 3 CT image quality is evaluated using a number of criteria including - answer - spatial resolution - low contrast resolution - temporal resolution Computer tomography for technologists exam review Romans chapter 1 page 3 This type of resolution choice refers to acquisition speed - answer Temporal resolution Computer tomography for technologists exam review Romans chapter 1 page 3 What is the controlling factor of temporal resolution - answer -gantry rotation speed -reconstruction method This term offers the ability to freeze motion and provide blur free images - answer Temporal resolution https://coursewareobjects.elsevier.com/objects/elr/DeMaio/CT2e/computedto
mography/index.htm Which of the following technical adjustments may be employed to improve temporal resolution of an MDCT system - answer decrease scan time https://coursewareobjects.elsevier.com/objects/elr/DeMaio/CT2e/computedto
mography/index.htm The CT process creates what type of images with information collected when an x -ray beam passes through an area of anatomy - answer Cross -
sectional images Computer tomography for technologists exam review Romans chapter 1 page 3 The CT slice represents a specific plane in the patient's body referred to as - answer The z -axis Computer tomography for technologists exam review Romans chapter 1 page 3 What axis determines the thickness of the cross -sectional slice - answer The z -axis Computer tomography for technologists exam review Romans chapter 1 page 3 The dimensions of a voxel can be calculated as a product of - answer -pixel size -section width https://coursewareobjects.elsevier.com/objects/elr/DeMaio/CT2e/computedto
mography/index.htm If the Z element or Z axis is taken into account the result is a cube referred to as a - answer Voxel Computer tomography for technologists exam review Romans chapter 1 page 3 The voxels dimension may be decreased by which of the following? - answer Decreasing the selection width Online exam Mosby What term of a CT image controls the length of the voxel - answer Section width Online exam Mosby The dimensions of a voxel may also be reduced through decreases in the ______ - answer -size of the pixels Online exam Mosby Data that form the CT slice are further section into - answer Elements Computer tomography for technologists exam review Romans chapter 1 page 3 These elements can consist of two dimensional squares in which the width is indicated by X and the height is indicated by Y.... what is the name of the term - answer Pixel Computer tomography for technologists exam review Romans chapter 1 page 3 What is the term that is a grid formed from rows and columns of pixels - answer Matrix Computer tomography for technologists exam review Romans chapter 1 page 3 The Xray photons pass through or are absorbed or scattered by structures and varying amounts depending on - answer - average photon energy of the x-ray beam - characteristic of the structure in its path
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