1 MIC-CT REGISTRY REVIEW-SYSTEM
OPERATIONS AND COMPONENTS
QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
D - ANSWER The slip ring on continuous rotation CT scanners:
a. prevents the high voltage cable from winding up
b. allows the exam to commence more rapidly
c. eliminates the need for the reversal of gantry frame rotation
d. all of the above
Analog-to-digital converter - ANSWER Which system component converts the projection attenuation
data into the proper digital form for the array processor?
Enter the detector chamber, be absorbed by the detector material and be converted to a measureable
event - ANSWER In order for an x-ray photon to be measured it must:
A - ANSWER 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
B - ANSWER Which is NOT part of the CT Tube?
a)-tungsten target
B)-collimator
C)-rotating anode
D)-filament
D - ANSWER Which of the following is FALSE regarding CT systems?
A)-they are limited to non-oblique transverse scanning
B)-they cannot generate a straight coronal or Sagittal image
C)-they have no moving parts?
D) all of the above
C - ANSWER 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
D)-The FDA imposes no limit on the dose to the patient
B - ANSWER Most of the commands from the technologist are received by the:
A)-Array processor
B)-operators console
C)-host computer
, D)-amplifier
B - ANSWER X-Rays are produced whenever fast-moving electrons collide with any form of matter
because:
A)-the electron splits into two X-ray photons of equal energy upon impact with matter
B)-the electron loses kinetic energy which is converted into the emission of an X-ray photon
C)-the electron converts the electron it collides with into an X-ray photon
A - ANSWER The mA determines:
A)-quantity of X-ray photons
B)-coefficient of attenuation
C) slice thickness
D)-energy level of the X-ray photons
C - ANSWER Which of the following is a component NOT normally located in the gantry of a modern CT
system?
A)-pre-patient collimator's
B)-solid-state detectors
C)-array processor
D)-x-Ray tube
A - ANSWER Tube inter scan delay time refers to:
A)-the time between the end of once scan and the start of the next scan durning 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
A - ANSWER Increased ____________ will increase the likelihood that a given X-ray will penetrate a
material.
A)-kv
B)-mA
C)-exposure time
B - ANSWER Which of the following are NOT commonly used on today's commercially available CT
scanners?
1.) Xenon detectors
2.) fourth-generation technology
3.) continuous rotation technology
A.) 1 only
B.) 1 & 2
C.) 2 & 3
D.) 1,2, & 3
B - ANSWER Which of the following statements is FALSE regarding occurrences after an x-ray photon
penetrates the detector aperture?
A) the photon can pass through the detector unmeasured
B) the photon is converted completely into an electron
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