CT Physics

27 Questions

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Computed Tomography Quizzes & Trivia

Questions and Answers
  • 1. 
    Computed Tomography (CT) results in a/an
    • A. 

      Analog image

    • B. 

      Linear image

    • C. 

      Digital image

    • D. 

      Image in time

    • E. 

      Curvilinear image

  • 2. 
    Which of the following scientists were instrumental in the initial development of CT?1. Alan Cormack2. Raymond Damadian3. Geodfrey Hounsfield4. Paul Lauterbur
    • A. 

      Only 1, 2, and 3 are correct

    • B. 

      Only 1 and 3 are correct

    • C. 

      Only 2 and 4 are correct

    • D. 

      Only 4 is correct

    • E. 

      All are correct

  • 3. 
    The principal advantage of CT over projection radiography is
    • A. 

      Speed of image acquisition

    • B. 

      Energy resolution

    • C. 

      Contrast resolution

    • D. 

      Spatial resolution

    • E. 

      Temporal resolution

  • 4. 
    Which of the following terms does not fit?
    • A. 

      Section

    • B. 

      Slice

    • C. 

      Tomos

    • D. 

      Axial

    • E. 

      Volume

  • 5. 
    Computed tomography is otherwise identified as
    • A. 

      Emission tomography

    • B. 

      Transmission tomography

    • C. 

      Reflection tomography

    • D. 

      Temporal tomography

    • E. 

      Volumetric tomography

  • 6. 
    When compared to projection radiography, conventional tomography shows
    • A. 

      Better spatial resolution

    • B. 

      Improved contrast resolution

    • C. 

      Reduced patient dose

    • D. 

      Relaxed quality control

    • E. 

      Less operator involvement

  • 7. 
    Which of the following involves emission of a signal from a patient?
    • A. 

      CT

    • B. 

      Diagnostic ultrasound

    • C. 

      Magnetic resonance imaging

    • D. 

      Projection radiography

    • E. 

      Spiral CT

  • 8. 
    The data acquisition in CT results in a/an
    • A. 

      Oblique image

    • B. 

      Transverse image

    • C. 

      Sagittal image

    • D. 

      Coronal image

    • E. 

      Volume image

  • 9. 
    Which of the following scientists received the nobel prize for their work leading to CT?1. Alan Cormack2. Raymond Damadian3. Geodfrey Hounsfield4. Paul Lauterbur
    • A. 

      Only 1,2 and 3 are correct

    • B. 

      Only 1 and 3 are correct

    • C. 

      Only 2 and 3 are correct

    • D. 

      Only 4 is correct

    • E. 

      All are correct

  • 10. 
    Which of the following are characteristic limitations of CT?1. spatial resolution2. artifact generation3. z-axis resolution4. patient dose
    • A. 

      Only 1, 2, and 3 are correct

    • B. 

      Only 1 and 3 are correct

    • C. 

      Only 2 and 4 are correct

    • D. 

      Only 4 is correct

    • E. 

      All are correct

  • 11. 
    A characteristic feature of a projection radiograph is
    • A. 

      Poor spatial resolution

    • B. 

      Lengthy data acquisition

    • C. 

      Difficult quality control requirements

    • D. 

      Tissue superimposition

    • E. 

      Excessive patient dose

  • 12. 
    Which of the following finds application in bone mineral assay for evaluation of osteoporosis?
    • A. 

      Radioisotope emission tomography

    • B. 

      Conventional tomography

    • C. 

      CT

    • D. 

      Projection radiography

    • E. 

      Fluoroscopy

  • 13. 
    Which of the following involves emission of a signal from a patient?
    • A. 

      CT

    • B. 

      Diagnostic ultrasound

    • C. 

      Projection radiography

    • D. 

      Radioisotope imaging

    • E. 

      Spiral CT

  • 14. 
    Compared to projection radiography, conventional tomography results in improved contrast resolution because
    • A. 

      Imaging time is reduced

    • B. 

      Out of plane tissues are blurred

    • C. 

      Tissues are superimposed

    • D. 

      Precise beam collimation is employed

    • E. 

      The x-ray beam is selectively filtered

  • 15. 
    Computed tomography results in improved contrast resolution because
    • A. 

      Digital techniques are employed

    • B. 

      Tissue superimposition is reduced

    • C. 

      Tissues are superimposed

    • D. 

      Precise beam collimation is employed

    • E. 

      KVp is significantly increased

  • 16. 
    The mathematics of back projection applied to image reconstruction in CT is credited to:
    • A. 

      Alan cormack

    • B. 

      Raymond Damadian

    • C. 

      Geofrey Hounsfield

    • D. 

      Frank Lauterbur

    • E. 

      Perry sprawls

  • 17. 
    Place the following in chronological order1. CT2. electron beam CT (EBCT)3. multiseciton computed tomography4. Spiral CT
    • A. 

      1,2,3,4

    • B. 

      1,2,4,3

    • C. 

      1,3,2,4

    • D. 

      1,4,2,3

    • E. 

      1,3,4,2

  • 18. 
    The term "projection" when applied to CT, refers to
    • A. 

      Speed of image acquisition

    • B. 

      A data set representing x-ray attenuation in the patient

    • C. 

      The size of the x-ray beam projected on the patient

    • D. 

      The shape of the x-ray beam projected on the patient

    • E. 

      The mathematics of image reconstruction

  • 19. 
    Compared to projection radiography, conventional tomography will improve1. contrast resolution2. patient dose3. superimposition of tissues4. spatial resolution
    • A. 

      Only 1, 2, and 3 are correct

    • B. 

      Only 1, and 2 are correct

    • C. 

      Only 2 and 4 are correct

    • D. 

      Only 4 is correct

    • E. 

      All are correct

  • 20. 
    Which of the following image modalities are likely to have lsess scatter radiation affecting the image?
    • A. 

      Fluoroscopy

    • B. 

      Projection of radiography

    • C. 

      Conventional tomography

    • D. 

      CT

    • E. 

      Radioisotope emission tomography

  • 21. 
    What is the principal cause of reduced contrast in projection radiography?
    • A. 

      Useful beam radiation

    • B. 

      Scatter radiation

    • C. 

      Leakage radiation

    • D. 

      Collimation

    • E. 

      KVp

  • 22. 
    The first CT image was demonstrated by
    • A. 

      Alan Cormack

    • B. 

      Raymond Damadian

    • C. 

      Geodfrey Hounsfield

    • D. 

      Frank Lauterbur

    • E. 

      Larry Rothenberg

  • 23. 
    The principle advantage of Ct over conventional tomography is
    • A. 

      Speed of image acquisition

    • B. 

      Reduced patient dose

    • C. 

      Improved contrast resolution

    • D. 

      Improved spatial resolution

    • E. 

      Fewer artifacts

  • 24. 
    Which of the following imaging modalities appeared first
    • A. 

      Emission imaging with radioisotopes

    • B. 

      Diagnostic ultrasound

    • C. 

      Projection radiography

    • D. 

      Electron beam CT (EBCT)

    • E. 

      Spiral CT

  • 25. 
    Image presentation in conventional tomography is
    • A. 

      Axial

    • B. 

      Coronal

    • C. 

      Sagittal

    • D. 

      Transverse

    • E. 

      Volumetric

  • 26. 
    When compared to projection radiography, conventional tomography shows
    • A. 

      Better spatial resolution

    • B. 

      Less tissue superimposition

    • C. 

      Reduced patient dose

    • D. 

      Relaxed quality control

    • E. 

      Less operator involvement

  • 27. 
    Compared to CT, film/screen radiography will give1. better spatial resolution2. lower entrance surface dose for a single image3. lower tube heating for a single image4. better low contrast resolution
    • A. 

      Only 1, 2, and 3 are correct

    • B. 

      Only 1 and 3 are correct

    • C. 

      Only 2 and 4 are correct

    • D. 

      Only 4 is correct

    • E. 

      All are correct