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Currently, the electron-beam computed tomography scanner is marketed by:


A) EMI
B) General Electric
C) Toshiba
D) Siemens

E) All of the above
F) None of the above

Correct Answer

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Please match the following computed tomography concepts. All answer selections will be used just once. -Optical disks


A) Determine tissue types in computed tomography slices
B) Algorithms
C) Image storage
D) Computed tomography dose descriptor
E) Converting electrical signals into digital data
F) Surface-based rendering

G) B) and E)
H) D) and F)

Correct Answer

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Who developed the first clinically useful computed tomography scanner?


A) Cormack
B) Roentgen
C) Hounsfield
D) Siemens Medical Systems

E) A) and B)
F) B) and C)

Correct Answer

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Processing images by computer is referred to as digital image processing.

A) True
B) False

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The mathematical techniques used by the computer to reconstruct the computed tomography image are known as:


A) computer programs
B) image reconstruction algorithms
C) manipulation of images
D) pattern recognition

E) A) and C)
F) A) and B)

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PACS is an acronym for picture archiving and communications systems.

A) True
B) False

Correct Answer

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Sectional images are obtained from all of the following except:


A) tomography
B) transverse axial tomography
C) conventional radiography
D) computed tomography

E) All of the above
F) B) and D)

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Which acronym has been established by the Radiological Society of North America for use in major American radiology journals?


A) CAT
B) CT
C) CTAT
D) RT

E) All of the above
F) A) and C)

Correct Answer

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The detectors convert the attenuation data into ____________ signals.


A) digital
B) electrical
C) light
D) mechanical

E) C) and D)
F) A) and B)

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Which of the following is best used to describe patient dose in computed tomography?


A) CTDI and MSAD
B) isometric curves
C) exposure doses
D) collective doses

E) None of the above
F) A) and B)

Correct Answer

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Please match the following computed tomography concepts. All answer selections will be used just once. -3D technique


A) Determine tissue types in computed tomography slices
B) Algorithms
C) Image storage
D) Computed tomography dose descriptor
E) Converting electrical signals into digital data
F) Surface-based rendering

G) A) and B)
H) B) and C)

Correct Answer

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Quality control is well established in computed tomography.

A) True
B) False

Correct Answer

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Which company pioneered the development of the first clinically useful computed tomography scanner?


A) General Electric
B) Siemens
C) Elscint
D) EMI

E) None of the above
F) A) and B)

Correct Answer

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In computed tomography,


A) a computer is used to reconstruct images of sectional anatomy.
B) a computer is used to calculate radiation dose to the patient.
C) a computer is not required because the physicist calculates the image, which the computer then prints out.
D) special detectors are used to reconstruct sectional images.

E) A) and C)
F) None of the above

Correct Answer

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In the original experiments in computed tomography, the computer took 9 hours to process one image.

A) True
B) False

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Isodose curves are a dose descriptor used in reporting radiation doses in computed tomography.

A) True
B) False

Correct Answer

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What contribution did Cormack make to the development of clinical computed tomography?


A) He developed Britain's first business computer.
B) He developed programs to calculate doses to patients.
C) He developed the solutions to the mathematical problems in computed tomography.
D) He performed a practical reconstruction of an image of the sun.

E) A) and C)
F) None of the above

Correct Answer

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All these elements can be used during data acquisition to reduce patient dose except:


A) combined applications
B) ultrafast ceramic detectors
C) decreased pitch
D) on-line dose modulation

E) B) and D)
F) B) and C)

Correct Answer

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Who developed the first whole-body computed tomography scanner?


A) Ledley
B) Kuhl
C) Cormack and Hounsfield
D) Oldendorf

E) A) and D)
F) B) and D)

Correct Answer

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Computed tomography has been applied to the study of internal log defects and Egyptian mummies.

A) True
B) False

Correct Answer

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