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Exam (elaborations)

CT SCAN QUIZ QUESTIONS AND ANSWERS

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  • Course
  • Computed Tomography
  • Institution
  • Computed Tomography

CT SCAN QUIZ QUESTIONS AND ANSWERS

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  • August 18, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Computed Tomography
  • Computed Tomography
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biggdreamer
CT SCAN QUIZ QUESTIONS AND
ANSWERS
The assigned number that is related to the linear attenuation coefficient of the tissue
within each voxel - answer-ct number

Opening in the center of the gantry - answer-aperture

Ct number of water - answer-zero

T or f a pt with a pacemaker can have a ct scan - answer-true

Circular device that houses the xray tube - answer-gantry

Single square or picture element within a matrix - answer-pixel

Amount of blurring detail and sharpness - answer-spatial resolution

Caused most common by quantum noise - answer-noise

T or f an arterial puncture is made for ct - answer-false

Range of ct numbers used to map signals into shades of gray - answer-window width

Dental fillings or a pacemaker can cause - answer-artifact

The process of creating a cross sectional tomographic plane of the body - answer-
computed tomography

Measures the radiation that exits the patient - answer-detectors

An array of numbers in a grid of rows and colums - answer-matrix

Midpoint of the gray range ,controls image brightness - answer-window level

Volume of tissue, product of pixel area and slice thickness - answer-voxel

Amount of data displayed on a monitor - answer-field of view

Technique that allows the contrast of image to be altered - answer-windowing

This sends information, or primary data to computer - answer-detector assembly

Computer uses to compile and calculate data - answer-algorithm

, Computer assembles data into matrix to form - answer-axial image

In the body the point of reference is - answer-anatomical position

Xray tube --> detector assembly--> primary data--> - answer-algorithm-->matrix-->axial
image on crt

The most frequently used section in imaging modalities -
answer-axial/transverse/horizontal plane

Specific sagittal plane that passes through the midline is - answer-midsagittal ( all
others are parasagittal)

Who developed ct - answer-godfrey hounsfield and allan cormack in 1970

1st brain tissue scanner was in - answer-1971

In 1973 - answer-united states first ct in mayo clinic

T or f first units were dedicated head scanners - answer-true

The whole body ct was developed in - answer-1974

Ct was first categorized as - answer-generations, now their by tube and detector
movement

First generation had how many detectors - answer-1 to 3, limited to brain, 3 to 5 min per
slice

Second generation had how many detectors - answer-30 detectors, 20 sec per slice

Third generation scanner - answer-750 to 950 detectors, 1 to 10 sec per slice

Fourth generation - answer-1000 detector, 1 to 10 sec per slice

T or f both 3rd and 4th designs used today - answer-true

This ct obtains lg amount of data in a short time and scans volume of tissue not
individual - answer-spiral/helical ct

Advantages of spiral/helical ct - answer-motion minimized,detects small lesions,useful
for uncooperative patients and decrease amount of contrast

Latest technology is - answer-volume ct

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