CT Principles Questions with Accurate Answers
_____ information is used to assess the three elements of technique of the 3D
imaging procedure. correct answer quantitative
1 Sievert is equal to? correct answer 100 rems
3D imaging has found applications in all of the following except? correct answer
ultrasound guided bx
A 10x10 matrix consists of _____ pixels. correct answer 100
A CT image of 12 bits per pixel means? correct answer each pixel can have a total
of 4096 shades of gray
A digital image ? correct answer is a numerical representation of an object
A high-voltage (kV) technique is necessary in CT imaging for all of the following
reasons except? correct answer to increase the probability of beam hardening
A histogram in digital image processing is? correct answer a plot of the numbers
of pixels as a function of the number of gray levels
A large cone beam will result in cone-beam artifacts. correct answer True
A larger matrix results in a larger pixel size. correct answer False
,A limitation of conventional radiography is that it is qualitative rather than
quantitative. correct answer True
A radiograph is an example of an analog image. correct answer True
A scaling factor of 1000 in the hounsfield scale for K result in a? correct answer
contrast scale of 0.1% per CT number
A set of ray sums is referred to as a? correct answer projection
A single ray in CT is? correct answer a single straight line path of an x-ray beam
A spiral or helical beam is used to scan the patient in slice by slice data aquisition.
correct answer False
A view in CT is? correct answer a collection of rays for one translation across the
object
All images displayed for viewing by humans are in the spatial frequency domain.
correct answer False
All of the following are automated systems used to assist with contrast
administration except? correct answer smart bolus
All of the following are major categories of artifacts except? correct answer noise
, All of the following are major elements of a typical 3D imaging system except?
correct answer detector array
All of the following are major systems in the basic equipment configuration for CT
except? correct answer dictation system
All of the following are problems that can occur from data acquisition with spiral
geometry except? correct answer increase patient dose
All of the following are requirements for volume scanning except? correct answer
tube memory
All of the following are scintillating materials used in PET detectors except?
correct answer calcium tungstate
All of the following are shading algorithms except? correct answer polygonal
shading
All of the following are steps crucial to performing a CT angiography examination
except? correct answer decreased collimation
All of the following are tissue types used for voxel classification except? correct
answer connective
All of the following are volume imaging methods except? correct answer
polygonal methods
_____ information is used to assess the three elements of technique of the 3D
imaging procedure. correct answer quantitative
1 Sievert is equal to? correct answer 100 rems
3D imaging has found applications in all of the following except? correct answer
ultrasound guided bx
A 10x10 matrix consists of _____ pixels. correct answer 100
A CT image of 12 bits per pixel means? correct answer each pixel can have a total
of 4096 shades of gray
A digital image ? correct answer is a numerical representation of an object
A high-voltage (kV) technique is necessary in CT imaging for all of the following
reasons except? correct answer to increase the probability of beam hardening
A histogram in digital image processing is? correct answer a plot of the numbers
of pixels as a function of the number of gray levels
A large cone beam will result in cone-beam artifacts. correct answer True
A larger matrix results in a larger pixel size. correct answer False
,A limitation of conventional radiography is that it is qualitative rather than
quantitative. correct answer True
A radiograph is an example of an analog image. correct answer True
A scaling factor of 1000 in the hounsfield scale for K result in a? correct answer
contrast scale of 0.1% per CT number
A set of ray sums is referred to as a? correct answer projection
A single ray in CT is? correct answer a single straight line path of an x-ray beam
A spiral or helical beam is used to scan the patient in slice by slice data aquisition.
correct answer False
A view in CT is? correct answer a collection of rays for one translation across the
object
All images displayed for viewing by humans are in the spatial frequency domain.
correct answer False
All of the following are automated systems used to assist with contrast
administration except? correct answer smart bolus
All of the following are major categories of artifacts except? correct answer noise
, All of the following are major elements of a typical 3D imaging system except?
correct answer detector array
All of the following are major systems in the basic equipment configuration for CT
except? correct answer dictation system
All of the following are problems that can occur from data acquisition with spiral
geometry except? correct answer increase patient dose
All of the following are requirements for volume scanning except? correct answer
tube memory
All of the following are scintillating materials used in PET detectors except?
correct answer calcium tungstate
All of the following are shading algorithms except? correct answer polygonal
shading
All of the following are steps crucial to performing a CT angiography examination
except? correct answer decreased collimation
All of the following are tissue types used for voxel classification except? correct
answer connective
All of the following are volume imaging methods except? correct answer
polygonal methods
