MIC CT Registry Review Updated with
Correct and Verified Answers
1. 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: 1,2,3
2. Which system component converts the projection
attenuation data into the proper digital form for the array
processor?: analog-to-digital converter
3. 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: reconstruction of the image
from raw data
4. Which of the following is not part of the CT tube?
a. tungsten target b. collimator
c. rotating anode
d. filament: collimator
5. Which of the following is FALSE regarding CT systems?
1. they are limited to nonoblique transverse scanning
2. they cannot generate a straight coronal or sagittal image
,3. hey have no moving parts: 1,2,3
6. Xrays 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: C
7. Most of the commands from the technologists are received
by the:: opera- tors console
8. Xrays are produced whenever fast moving electrons collide
with any form of matter because:: The electron loses kinetic
energy which is converted into the emission of an x-ray photon
9. The mA determines the:: quantity of x-ray photons
10. Which of the following is a component NOT normally
located in the gantry of a modern CT system?: array processor
11. Tube interscan delay time refers to:: the time between the
end of one scan and the start of the next scan during which the
tube will cool
12. Increased will increase the likelihood that a given
x-ray will pen- etrate a material
1. kV
2. mA
,3. exposure time: 1
13. Which of the following are NOT commonly used on
today's commercially available CT scanners?
1. xenon detectors
2. fourth-generation technology
3. continous rotation technology: 1,2
14. Which of the following statements is FALSE regarding
occurrences after an x-ray photon penetrates the detector
aperture?
1. the photon can pass through the detector unmeasured
2. the photon is converted completely into a electron
3. the measured signal in enhanced by an amplifier: 2
15. Scatter radiation is caused by:: deflections from the original
trajectory of an x-ray photon through the patient
16. What control does the operator have over the x-rays in a
CT exam?: the energy level and the quantity of x-rays can be
selected
17. Which of the following is the standard that's used to
achieve compatibility for image transfer between various
imaging modalities, viewing stations, and printers in a
hospital?: DICOM
, 18. The enormous heat that builds up in the CT tube is
caused by what?: Col- lision of the electron beam with the
tungsten target on the tube anode
19. made helical imaging possible:
Continuous rotation scanners
20. The patient table:
a. may move continuously during the scan
b. can never be positioned automatically by software due to
safety precautions c. remains stationary through the exam
once it is initially positioned
d. only moves after each slice is completed: A
21. The main purpose of the detector is to:: capture x-ray
photons and convert them to a measurable signal
22. The cathode filament:: helps determine the size of the focal
spot
23. Which of the statements in TRUE:
1. kV is the voltage potential between the tube cathode and
anode while mA
ultimately controls the filament temp of the cathode filament
2. kV controls the energy level of the x-ray photons and mA
controls the number of x-ray photons emitted from the tube
Correct and Verified Answers
1. 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: 1,2,3
2. Which system component converts the projection
attenuation data into the proper digital form for the array
processor?: analog-to-digital converter
3. 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: reconstruction of the image
from raw data
4. Which of the following is not part of the CT tube?
a. tungsten target b. collimator
c. rotating anode
d. filament: collimator
5. Which of the following is FALSE regarding CT systems?
1. they are limited to nonoblique transverse scanning
2. they cannot generate a straight coronal or sagittal image
,3. hey have no moving parts: 1,2,3
6. Xrays 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: C
7. Most of the commands from the technologists are received
by the:: opera- tors console
8. Xrays are produced whenever fast moving electrons collide
with any form of matter because:: The electron loses kinetic
energy which is converted into the emission of an x-ray photon
9. The mA determines the:: quantity of x-ray photons
10. Which of the following is a component NOT normally
located in the gantry of a modern CT system?: array processor
11. Tube interscan delay time refers to:: the time between the
end of one scan and the start of the next scan during which the
tube will cool
12. Increased will increase the likelihood that a given
x-ray will pen- etrate a material
1. kV
2. mA
,3. exposure time: 1
13. Which of the following are NOT commonly used on
today's commercially available CT scanners?
1. xenon detectors
2. fourth-generation technology
3. continous rotation technology: 1,2
14. Which of the following statements is FALSE regarding
occurrences after an x-ray photon penetrates the detector
aperture?
1. the photon can pass through the detector unmeasured
2. the photon is converted completely into a electron
3. the measured signal in enhanced by an amplifier: 2
15. Scatter radiation is caused by:: deflections from the original
trajectory of an x-ray photon through the patient
16. What control does the operator have over the x-rays in a
CT exam?: the energy level and the quantity of x-rays can be
selected
17. Which of the following is the standard that's used to
achieve compatibility for image transfer between various
imaging modalities, viewing stations, and printers in a
hospital?: DICOM
, 18. The enormous heat that builds up in the CT tube is
caused by what?: Col- lision of the electron beam with the
tungsten target on the tube anode
19. made helical imaging possible:
Continuous rotation scanners
20. The patient table:
a. may move continuously during the scan
b. can never be positioned automatically by software due to
safety precautions c. remains stationary through the exam
once it is initially positioned
d. only moves after each slice is completed: A
21. The main purpose of the detector is to:: capture x-ray
photons and convert them to a measurable signal
22. The cathode filament:: helps determine the size of the focal
spot
23. Which of the statements in TRUE:
1. kV is the voltage potential between the tube cathode and
anode while mA
ultimately controls the filament temp of the cathode filament
2. kV controls the energy level of the x-ray photons and mA
controls the number of x-ray photons emitted from the tube
