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Computed tomography questions with correct answers respectively.
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Computed tomography questions with correct answers respectively.
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Computed tomography questions withcorrect answers respectively.
the image produced in CT is: ANS - -transaxial or transverse
-is perpendicular to the long axis of the body.
the axial tomography is what kind of tomography? ANS - conventional tomography.
in axial tomography, the plane of the image is what to the long axis of the body? ANS - parallel
what images does axial tomography produce is is possilbe with computed tomography? ANS - sagittal
and coronal images
gantry is often referred to as what? ANS - the "doughnut"
the gantry is the part of the CT scanner that houses what 4 things? ANS - -cooling system
-Data acquisition system (DAS)
-detector assembly
-x ray tube
-high voltage generator
-patient support/couch
the ct scanner has what 3 components? ANS - 1. gantry
2. operator console
3. patient table (couch)
what is also referred to as the hounsfeild unit? (HU) ANS - the "CT number"
what is the hounsfield unit defined as? ANS - -numerical information of a pixel
, -related to the attenuation of the tissue
A CT number of 0 represents what? ANS - water
A CT number of -1000 represents what? ANS - air
A CT number of 1000-3000 represents what? ANS - dense bone
A CT number of +40 represents what? ANS - grey matter
A CT number of -100 represents what? ANS - fat
what is translation? ANS - a single sweep across the patient
what is an algorithm? ANS - a mathematical formula to carry out calculations required for image
reconstruction
what is a secondary definiton of an algorithm? ANS - it enhances soft tissue, bone and edge resolution
what is an image matrix? ANS - its a an arrangement of cells in rows or columns
what 2 things are defined as a pixel? ANS - 1. its a 2d representation of a 3d tissue volume
2. the individual cells in a matrix
what is a voxel? ANS - its the tissue volume
what is the basic unit of a CT image? ANS - a voxel, or the basic unit of a CT image.
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