Which of the following scientists were instrumental in the initial development of CT.
1. Alan Cormack
2. Raymond Damadian
3. Geodfrey Hounsfield
4. Paul Lauterbur
C. Only 1 and 3 are correct
Computed tomograpy (CT) results in a/an
A. digital image
The principal advantage of CT over projection radiography is
E. contrast resolution
Which of the following terms does not fit?
E. volume
Computed tomography is otherwise identified as
B. transmission tomography
When compared to projection radiography, conventional tomography shows
C. improved contrast resolution
Which of the following involves emission of a signal from a patient?
B. magnetic resonance imaging
The data acquisition in CT results in a/an
B. transverse image
Which of the following scientists received the Nobel Prize for their work leading to CT?
1. Alan Cormack
2. Raymond Damadian
3. Geodfrey Hounsfield
4. Paul Lauterbur
B. Only 1 and 3 are correct
Which of the following are characteristic limitation of CT?
1. spatial resolution
2. artifact generation
3. z-axis resolution
4. patient dose
D. all are correct
A characteristic feature of a projection radiograph is
B. tissue superimposition
which of the following finds application in bone mineral assay for evaluation of osteoporosis?
B. CT
Which of the following involves emission of a signal from a patient?
C. radioisotope imaging
Compared to projection radiography, conventional tomography results in improved contrast resolution because
A. out of plane tissue are blurred
Computed tomography results in improved contrast resolution because
B. precise beam collimation is employed
The mathematics of back projection applied to image reconstruction in CT is credited to
B. Alan Cormack
Place the following in chronological order.
1. CT
2. electron beam CT (EBCT)
3. multisection computed tomography
4. spiral CT
A. 1, 2, 4, 3
The term "projection," when applied to CT, refers to
B. a data set representing x-ray attenuation in the patient
Compared to projection radiography, conventional tomography will improve
1. contrast resolution
2. patient dose
3. superimposition of tissues
4. spatial resolution
b. patient dose
Which of the following image modalities are likely to have less scatter radiation affecting the image?
E. CT
What is the principal cause of reduced contrast in projection radiography?
A. scatter radiation
The first CT image was demonstrated by
A. Geodfrey Hounsfield
The Principal advantage of CT over conventional tomography is
c. fewer artifacts
D. improved contrast resolution
Which of the following imaging modalities appeared first?
B. projection radiography
Image presentation in conventional tomography is
A. axial
When compared to projection radiography, conventional tomography shows
C. less tissue superimposition
Compared to CT, film/screen radiography will give
1. better spatial resolution
2. lower entrance surface dose for a single image
3. lower tube heating for a single image
4. better low contrast resolution
D. Only 1, 2, and 3 are correct
Which of the following is a characteristic of a first-generation CT Imager?
A. pencil beam
Which of the following CT imagers is often referred to as the heart scan?
B. spiral
Which of the following is a particular characteristic of fourth-generation CT imagers?
E. fixed detector array
Which of the following CT imagers has no mechanical moving parts in the gantry?
B. electron beam
Which of the following is characteristic of a first-generation CT imager?
D. five minute imaging time
6. Which of the following features led to the development of the spiral CT imager?
C. electronic slip rings
Ring artifacts are characteristic of
C. third-generation CT
Which of the following is characteristic of a second-generation CT imager?
A. translate-rotate motion
The principal advantage to electron beam CT (EBCT) is
A. subsecond imaging time
During spiral CT, the motion of the patient couch is
A. continuously advanced
Which of the following is characteristic of a second-generation CT imager?
D. thirty second imaging time
Which of following the are characteristic of a first-generation CT imager?
1. pencil beam
2. single detector
3. translate-rotate motion
4. no body imaging
D. all are correct
Current design of electron CT (EBCT) allows for simultaneous production of
D. four slices
Which of the following is characteristic of a second-generation CT imager?
1. fan-shaped x-ray beam
2. detector array
3. translate-rotate motion
4. capable of imaging head and body
C. All are correct
X-radiation produced by an electron beam CT (EBCT) imager is emitted from a/an