CT Physics
- 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
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