MIC CT REGISTRY REVIEW POST
TESTS QUESTIONS WITH CORRECT
ANSWERS
In order for an x-ray photon to be measured it must:
1. enter the detector chamber
2. be absorbed by the detector material
3. be converted to a measurable event
a. 1 only
b. 2 only
c. 3 only
d. 1, 2 & 3 - Answer-D. 1, 2, and 3
Which system component converts the projection attenuation data into the proper digital
form for the array processor?
A. Detector
B. Photodiode
C. Analog to digital converter
D. Host computer - Answer-c. Analog-to-digital converter
Which of the following is not a function of a PACS System?
A. Reconstruction of the image from the raw data
B. Long-term data storage
C. Digital distribution of images
D. Image display for the radiologist - Answer-a. reconstruction of the image from the raw
data
Which of the following is not part of the CT tube?
A. Tungsten target
B. Collimator
C. Rotating anode
D. Filament - Answer-b. collimator
Which of the following is false regarding CT systems?
1. They are limited to non-oblique transverse scanning
2. They cannot generate a straight coronal or sagittal image
3. They have no moving parts - Answer-D. 1, 2 & 3
X-rays are used in CT because:
A. They are easily produced by the high frequency generator
B. They are less harmful than the heating effects of microwave radiation
C. They penetrate the body according to specific attenuation characteristics of each
tissue
, D. The FDA imposes no limit on the dose to the patient - Answer-c. they penetrate the
body according to specific attenuation characteristics of each tissue
Most of the commands from the technologist are received by the:
A. Array processor
B. Operators console
C. Host computer
D. Amplifier - Answer-b. operator's console
X-rays are produced whenever fast moving electrons collide with any form of matter
because:
1. The electron splits into two x-ray photons of equal energy upon impact with the
matter
2. The electron loses kinetic energy which is converted into the emission of an x-ray
photon
3. The electron converts the electronic collides with into an x-ray photon - Answer-2 only
The mA determines the:
A. Quantity of x-ray photons
B. Coefficient of attenuation
C. Slice thickness
D. Energy level of the x-ray photons - Answer-A. Quantity of x-ray photons
Which of the following is a component not normally located in the gantry of a modern
CT system?
A. Pre-patient collimators
B. Solid state detectors
C. Array processor
D. X-ray tube - Answer-c. array processor
Tube interscan delay time refers to:
a. the time between the end of one scan and the start of the next scan during which the
tube will cool
b. a quality assurance test performed daily by the technologist
c. the time required for the tube to make a complete 360 revolution about the gantry
d. the length of time required for the production of photons to begin after applying the
voltage to the tube - Answer-A. the time between the end of one scan and the start of
the next scan during which the tube will cool
Increased______will increase the likelihood that a given x-ray will penetrate a material:
1. kVp
2. mA
3. Exposure time - Answer-1 only
Collimation:
a. is accomplished by electrically blocking x-ray
TESTS QUESTIONS WITH CORRECT
ANSWERS
In order for an x-ray photon to be measured it must:
1. enter the detector chamber
2. be absorbed by the detector material
3. be converted to a measurable event
a. 1 only
b. 2 only
c. 3 only
d. 1, 2 & 3 - Answer-D. 1, 2, and 3
Which system component converts the projection attenuation data into the proper digital
form for the array processor?
A. Detector
B. Photodiode
C. Analog to digital converter
D. Host computer - Answer-c. Analog-to-digital converter
Which of the following is not a function of a PACS System?
A. Reconstruction of the image from the raw data
B. Long-term data storage
C. Digital distribution of images
D. Image display for the radiologist - Answer-a. reconstruction of the image from the raw
data
Which of the following is not part of the CT tube?
A. Tungsten target
B. Collimator
C. Rotating anode
D. Filament - Answer-b. collimator
Which of the following is false regarding CT systems?
1. They are limited to non-oblique transverse scanning
2. They cannot generate a straight coronal or sagittal image
3. They have no moving parts - Answer-D. 1, 2 & 3
X-rays are used in CT because:
A. They are easily produced by the high frequency generator
B. They are less harmful than the heating effects of microwave radiation
C. They penetrate the body according to specific attenuation characteristics of each
tissue
, D. The FDA imposes no limit on the dose to the patient - Answer-c. they penetrate the
body according to specific attenuation characteristics of each tissue
Most of the commands from the technologist are received by the:
A. Array processor
B. Operators console
C. Host computer
D. Amplifier - Answer-b. operator's console
X-rays are produced whenever fast moving electrons collide with any form of matter
because:
1. The electron splits into two x-ray photons of equal energy upon impact with the
matter
2. The electron loses kinetic energy which is converted into the emission of an x-ray
photon
3. The electron converts the electronic collides with into an x-ray photon - Answer-2 only
The mA determines the:
A. Quantity of x-ray photons
B. Coefficient of attenuation
C. Slice thickness
D. Energy level of the x-ray photons - Answer-A. Quantity of x-ray photons
Which of the following is a component not normally located in the gantry of a modern
CT system?
A. Pre-patient collimators
B. Solid state detectors
C. Array processor
D. X-ray tube - Answer-c. array processor
Tube interscan delay time refers to:
a. the time between the end of one scan and the start of the next scan during which the
tube will cool
b. a quality assurance test performed daily by the technologist
c. the time required for the tube to make a complete 360 revolution about the gantry
d. the length of time required for the production of photons to begin after applying the
voltage to the tube - Answer-A. the time between the end of one scan and the start of
the next scan during which the tube will cool
Increased______will increase the likelihood that a given x-ray will penetrate a material:
1. kVp
2. mA
3. Exposure time - Answer-1 only
Collimation:
a. is accomplished by electrically blocking x-ray
