Exam (elaborations)
CT Registry Review (MIC) Test/ / 303 Questions with Solved Correct Answers/A Grade.
- Course
- Institution
CT Registry Review (MIC) Test/ / 303 Questions with Solved Correct Answers/A Grade.
[Show more]
Seller
Follow
Nurselucy2023
Content preview
CT Registry Review (MIC) Test/2023-2024/ 303 Questions with
Solved Correct Answers/A
Grade.
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
-Which system component converts the projection attenuation data into
the proper digital form for the array processor? - -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 - -reconstruction of the image from
raw data
-Which of the following is not part of the CT tube?
a. tungsten target
b. collimator
c. rotating anode
d. filament - -collimator
-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
-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
-Most of the commands from the technologists are received by the: - -
operators console
-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
,-The mA determines the: - -quantity of x-ray photons
-Which of the following is a component NOT normally located in the
gantry of a modern CT system? - -array processor
-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
-Increased _______ will increase the likelihood that a given x-ray will
penetrate a material
1. kV
2. mA
3. exposure time - -1
-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
-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
-Scatter radiation is caused by: - -deflections from the original
trajectory of an x-ray photon through the patient
-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
-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
-The enormous heat that builds up in the CT tube is caused by what? - -
Collision of the electron beam with the tungsten target on the tube
anode
-_________________ made helical imaging possible - -Continuous rotation
scanners
-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
, -The main purpose of the detector is to: - -capture x-ray photons and
convert them to a measurable signal
-The cathode filament: - -helps determine the size of the focal spot
-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
3. although kV and the mA affect the operation of the CT x-ray tube, the
two parameters have no bearing on the image quality - -1,2
-The number of electrons that flow from the cathode to the anode is
controlled by the: - -mA
-Which of the following is TRUE regarding solid state detectors:
1. x-ray photons cause the detectors to generate a flash of light
2. they are the detector type used on most CT scanners
3. they can be used in both third-generation and fourth-generation CT
systems - -1,2,3
-The slip ring on continous rotation CT scanners:
1. prevent the high voltage cable from winding up
2. allows the exam to commence more rapidly
3. eliminates the need for the reversal of gantry frame rotation - -1,2,3
-CT is commonly referred to as all of the following except:
1. computerized axial tomography
2. digital subtraction angiography
3. CAT-scan
4. computed tomography - -2
-Which of the following CT scanner designs does NOT use an x-ray
tube?
1. first generation
2. PET/CT
3. electron beam CT
4. MDCT - -3
-__________ allows remote authorized individuals to connect to a server
in a secure fashion using the routing infrastructure provided on a public
network, such as the internet. - -VPNs (virtual private networks)
-Which technology do multi-row detector scanners employ? - -third-
generation
-Which of the following statements is FALSE regarding the collection of
CT data?
, 1. long scan times are more desirable because they average out motion
artifacts
2. reconstruction process used to create the image occurs in the array
processor
3. to collect the complete st of CT data, x-rays must be passed through
the body at many different angles
4. the detectors measure the x-rays which completely penetrate the
patient - -1
-On a single-row detector scanner, collimation:
1. controls the slice thickness
2. minimizes the x-ray dose to the patient
3. reduces the detection of scatter radiation - -1,2,3
-In a radiology department, a ________________ is a example of a "client"
on the network:
a. CT scanner
b. viewing console in the physicians reading room
c. printer for diagnostic images - -a,b,c
-Which of the following is TRUE regarding multi-row detector for CT
scanners?
1. size of the detector arrays along the z-direction may be different
2. the attenuation information from adjacent detector arrays may be
added together to generate thicker slices
3. all of the detectors arrays may or may not be used - -1,2,3
-The CT x-ray tube rotates around the patient to:
1. keep the tube cool
2. generate projection views at different angles
3. minimize the x-ray dose administered to the patient - -2
-Collimation:
1. accomplished by electrically blocking x-rays
2. affects scan time
3. limits low every x-ray photons and passed high energy photons
4. is accomplished by physically blocking x-rays - -4
-Tungsten is used as the target material on the tubes anode because it
has a _________ atomic number and a _________ melting point
1. low, high
2. high, low
3. low, low
4. high,high - -4
-CT images can be directly scanned in planes other than transverse by:
1. orienting the patient's body part so that it is not perpendicular to the
x-ray beam
2. tilting the gantry
3. changing the angle that the x-ray beam leaves the tube - -1,2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Nurselucy2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $20.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now