Exam (elaborations)
CT Image Production with accurate solutions
- Course
- Institution
CT Image Production with accurate solutions
[Show more]
Content preview
CT Image ProductionWhich two of the following were significant limitations of early computed tomography (CT) scanners?
(Select two) - correct answer ✔✔- early CT scanners required several hours for image production
- early CT scanners were only large enough to scan the head
What is the advantage of producing three dimensions of image data in CT? - correct answer ✔✔patient
anatomy can be viewed in slices without superimposition
Contrast-enhanced imaging is significant in CT scanning because it: - correct answer ✔✔enables
differentiation between similar-density tissues
What is the basis of image production in both radiographic imaging and CT imaging? - correct answer
✔✔both detect and display tissues based on density
Which CT examination is most commonly ordered, representing nearly 25% of all CT scans at most
institutions? - correct answer ✔✔CT head without contrast
What is the primary advantage of CT imaging in the diagnosis of a ruptured aortic aneurysm? - correct
answer ✔✔CT imaging allows for diagnosis without invasive surgeries
What characteristic of CT imaging allows for the reformation of images into axial, sagittal, and coronal
planes? - correct answer ✔✔collection of a three-dimensional data set
What is the primary purpose of administering iodinated contrast for CT imaging? - correct answer
✔✔increased tissue differentiation
Which of the following images represents a coronal plane of the brain? - correct answer ✔✔image (B)
What imaging factor has improved the visibility of the Wilms tumor in image (B)? - correct answer
✔✔use of intravenous (IV) contrast media
,The cathode filament inside the x-ray tube primarily serves as the: - correct answer ✔✔source of
electrons
What is the primary purpose of the anode inside the x-ray tube? - correct answer ✔✔serve as the target
of the electron stream
Which of the following terms refers to the number of x-ray photons produced in the x-ray beam? -
correct answer ✔✔intensity
When the milliamperage (mA) is increased, the x-ray beam intensity will: - correct answer ✔✔increase
How is the x-ray beam intensity influenced by an increase in the rotation time used for a CT procedure? -
correct answer ✔✔increased x-ray beam intensity
The milliampere-seconds (mA) used for a CT procedure is the product of the milliamperage (mA) and
what other exposure factor? - correct answer ✔✔rotation time
If rotation time is reduced by half, what adjustment should be made to the milliamperage (mA) to retain
the same photon intensity? - correct answer ✔✔mA should be doubled
How does an increase in the kilovoltage peak (kVp) setting influence the x-ray beam intensity? - correct
answer ✔✔intensity increases
What exposure factor should be adjusted to increase the proportion of x-ray beam penetration through
the patient during a CT procedure? - correct answer ✔✔increase kVp
The following image represents the prescribed tube current for a CT procedure, overlying the lateral
localizer image. Based on this graphic, what is the maximum tube current to be used during the scan? -
correct answer ✔✔450 milliamperes (mA)
The milliampere-seconds (mAs) used for a CT procedure is the product of the milliamperage (mA) and
what other exposure factor? - correct answer ✔✔rotation time
, What is the primary difference between CT data acquisition and general radiography acquisition? -
correct answer ✔✔CT images are created from hundreds of projections around the patient
How are the basic steps of image production in CT similar to that of digital radiography? - correct answer
✔✔both CT and radiography create images based on x-ray attenuation
What portion of the CT scanner system houses the x-ray tube? - correct answer ✔✔gantry
How much time is required by modern CT scanners for the processing of individual x-ray projections into
a CT image? - correct answer ✔✔a few milliseconds
Which of the following components in the CT scanner is responsible for shaping the dimensions of the
incident x-ray beam? - correct answer ✔✔collimators
Which system in the CT scanner is responsible for the physical support of critical components like the x-
ray tube and detectors? - correct answer ✔✔scanner gantry
What is the primary advantage of a 32-slice CT scanner compared to a 16-slice CT scanner? - correct
answer ✔✔decreased data acquisition time
What portion of the following CT scanner gantry represents the detector array? - correct answer
✔✔component (A)
What portion of the following CT scanner system houses the host computer and array processor? -
correct answer ✔✔component (D)
What is the role of the detectors in the CT scanner? - correct answer ✔✔collecting the remnant x-ray
beam
Which of the following devices is responsible for capturing radiation and producing an electrical signal in
a CT scanner? - correct answer ✔✔detectors
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 BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $19.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now