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WorksheetsCTPI QUIZZES 2
Total questions: 15
Worksheet time: 15mins
Which of the following does not produce a tranverse axial sectional image?
Computed Tomography
Conventional Tomography
Conventional Radiography
Computerized Axial Tomography
Which of the following is true?
An analog computer is used to produce images in CT
Volumes scanning involves scanning the body one slice at a time
Two essential components of a digital image processing system ate the ADC and the DAC
Quality control is not so well established in CT
The primary goal of spiral/helical CT scanning is to
Improve the volume coverage speed performance
Improve the diagnostic skills of the radiologist
Make use of lower mA values
Scan children who are difficult to handle
Which of the following applications of volume CT is based on volume formulations, calcification and image projection?
CT fluoroscopy
CT angiography
3D imaging
CT endoscopy
Which of the following is based on virtual reality principles?
CT fluoroscopy
CT angiography
3D imaging
CT endoscopy
Which of the following is not a visible image?
Drawing
Painting
Mathematical Image
Photograph
Which of the following best describes a digital image?
Discrete function
Numerical representation of an object
Cannot be processed by a computer
Non-visible physical image
The logical steps in digitizing an image are:
Scan, sample, and quantize
Sample, scan and quantize
Quantize, sample and scan
Sample, quantize and scan
Which of the following represents a picture element?
Address
Voxel
Pixel
Matrix
The process of measuring the brightness level of each pixel in an image is referred to as:
Quantization
Sampling
Scanning
Analog to digital conversion
A 10 bit ADC will divide up a signal into_______ parts
8
2
256
1024
Which of the following is an example of gray level mapping?
Local operation
Point processing operation
Geometric operation
Global operation
Poor sampling of the signal to be digitized by the ADC will result in which of the following artifacts?
Beam hardening
Partial volume
Aliasing
Streaking
Data acquisition in CT refers to:
acquiring information from the CT detectors
acquiring information from the computer
acquiring data from the patient through systematic motion of the x-ray tube and detector
All are correct
Data from the CT detectors are first sent to the
array processor
host computer
back projector
preprocessor
