CT REGISTRY REVIEW (MIC) NEWEST
UPDATED MULTIPLE AND SINGLE CHOICE
COMBO EXAM |QUESTIONS AND ANSWERS
(100% CORRECT) & 100% SUCCESS
GUARANTEED
In order for an x-ray photon to be measured it must:
v v v v v v v v v v
1. enter the detector chamber
v v v v
2. be absorbed by the detector material
v v v v v v
3. be converted to a measurable event
v v v v v v vvvvvvvvvv ANS: 1,2,3 vvv
Which system component converts the projection attenuation data
v v v v v v v
into the proper digital form for the array processor?
v v v ANS: v v v v v v vvvvvvvvvv vv
analog-to-digital converter
v v
Which of the following is NOT a function of a PACS system?
v v v v v v v v v v v
a. reconstruction of the image from the raw data
v v v v v v v v
b. long term data storage
v v v v
c. digital distribution of images
v v v v v
d. image display for the radiologist
v v v v v vvvvvvvvvv ANS: reconstruction of vvv v
the image from raw data
v v v v v
Which of the following is not part of the CT tube?
v v v v v v v v v v
,a. tungsten target
v v
b. collimator
v v
c. rotating anode
v v
d. filament
v vvvvvvvvvv ANS: collimator vvv
Which of the following is FALSE regarding CT systems?
v v v v v v v v
1. they are limited to nonoblique transverse scanning
v v v v v v v
2. they cannot generate a straight coronal or sagittal image
v v v v v v v v v
3. hey have no moving parts
v v v v v vvvvvvvvvv ANS: 1,2,3 vvv
Xrays are used in CT because:
v v v v v
a. they are easily produced by the high frequency generator
v v v v v v v v v v
b. they are less harmful than the heating effects of microwave
v v v v v v v v v v
radiation
v
c. they penetrate the body according to specific attenuation
v v v v v v v v
characteristics of each tissue
v v v v
d. the FDA imposes no limit on the dose to the patient
v v v v v v v v v v v vvvvvvvvvv ANS: vv
C
v
Most of the commands from the technologists are received by the:
v v v v v v v v v v vv
ANS: operators console
vvvvvvvv vvv v
Xrays are produced whenever fast moving electrons collide with
v v v v v v v v
any form of matter because:
v v v ANS: The electron loses kinetic
v v vvvvvvvvvv vvv v v v
energy which is converted into the emission of an x-ray photon
v v v v v v v v v v v
,The mA determines the:
v v v vvvvvvvvvv ANS: quantity of x-ray photons
vvv v v v
Which of the following is a component NOT normally located in
v v v v v v v v v v
the gantry of a modern CT system?
v v ANS: array processor
v v v v v vvvvvvvvvv vvv v
Tube interscan delay time refers to:
v ANS: the time between v v v v vvvvvvvvvv vvv v v
the end of one scan and the start of the next scan during which the
v v v v v v v v v v v v v v v
tube will cool
v v v
Increased _______ will increase the likelihood that a given x-ray
v v v v v v v v v
will penetrate a material
v v v v
1. kV
v
2. mA
v
3. exposure time
v v vvvvvvvvvv ANS: 1 vvv
Which of the following are NOT commonly used on today's
v v v v v v v v v
commercially available CT scanners?
v v v v
1. xenon detectors
v v
2. fourth-generation technology
v v
3. continous rotation technology
v v v vvvvvvvvvv ANS: 1,2 vvv
Which of the following statements is FALSE regarding occurrences
v v v v v v v v
after an x-ray photon penetrates the detector aperture?
v v v v v v v v v
1. the photon can pass through the detector unmeasured
v v v v v v v v v
, 2. the photon is converted completely into a electron
v v v v v v v v
3. the measured signal in enhanced by an amplifier
v v v v v v v v vvvvvvvvvv ANS: 2 vvv
Scatter radiation is caused by:
v ANS: deflections from the v v v vvvvvvvvvv vvv v v
original trajectory of an x-ray photon through the patient
v v v v v v v v v
What control does the operator have over the x-rays in a CT exam?
v v v v v v v v v v v v v
ANS: the energy level and the quantity of x-rays can be
vvvvvvvvv vvv v v v v v v v v v
selected
v
Which of the following is the standard that's used to achieve
v v v v v v v v v v
compatibility for image transfer between various imaging
v v v v v v v
modalities, viewing stations, and printers in a hospital?
v v ANS: v v v v v v vvvvvvvvvv v
DICOM
vv
The enormous heat that builds up in the CT tube is caused by what?
v v v v v v v v v v v v v
ANS: Collision of the electron beam with the tungsten target
vvvvvvvvvv vvv v v v v v v v v
on the tube anode
v v v v
_________________ made helical imaging possible v v v v vvvvvvvvvv ANS: vv
Continuous rotation scanners
v v v
The patient table:
v v
a. may move continuously during the scan
v v v v v v
b. can never be positioned automatically by software due to safety
v v v v v v v v v v
precautions
v
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