Exam (elaborations)
Computed Tomography questions well answered already passed
- Course
- Institution
Computed Tomography questions well answered already passed
[Show more]
Seller
Follow
BravelRadon
Reviews received
Content preview
Computed TomographyThe word Tomo is tomography means - correct answer ✔✔To cut
What is the Z-axis - correct answer ✔✔the thickness of a cross-sectional slice.
The degree to which an x-ray beam is reduced by an object is referred to as - correct answer
✔✔Attenuation
The amount of the x-ray beam that is absorbed per unit thickness of the absorber - correct answer
✔✔Linear Attenuation
difference in linear attenuation coefficient is responsible for - correct answer ✔✔Image Contrast
These are the two dimensional squares of the matrix - correct answer ✔✔Pixels
The 3d dimension of the matrix are known as - correct answer ✔✔Voxels
Number of pixels in a matrix are product of number of - correct answer ✔✔Rows and columns
Beam attenuation of CT are measured in - correct answer ✔✔Hounsfield Units
Scan Data is the same as - correct answer ✔✔Raw Data
The ability of a system to define small objects distictly - correct answer ✔✔Spatial Resolution
This image quality's criteria refers to the speed at which the data can be acquired - correct answer
✔✔Temporal Resolution
,This image quality criteria is the ability to differentiate objects with similar densities - correct answer
✔✔Contrast Resolution
Multi slice is defined as _ to _ slices per gantry - correct answer ✔✔4 to 320
the time required to acquire all x-ray projections that are needed to reconstruct one CT image - correct
answer ✔✔Temporal resolution
2 advantages of volume scanning are - correct answer ✔✔shorter scan times
scanning more volume of anatomy
A single image reconstructed from a volume of acquired data. - correct answer ✔✔Slice
he group of slices which make up a particular examination - correct answer ✔✔Scan
Refers to a single exposure which results in an image much like a conventional x-ray - correct answer
✔✔Localizing Scan
determines how many detector cells collect data - correct answer ✔✔Scan field
determines what portion of the scan field of view is reconstructed - correct answer ✔✔field of view
This centre point is called - correct answer ✔✔display field of view centre
defined as the x and y distance from isocentre in cm - correct answer ✔✔display field of view centre
These mathematical algorithms help generate 2-D axial images from the spiral (3-D volumetric) data -
correct answer ✔✔interpolation algorithm
, If the image has fewer shades of grey, it presents with increased image contrast (more black and white)
and is expressed with a - correct answer ✔✔narrow window width
more shades of grey are expressed with - correct answer ✔✔wide window width
Ct provides us wih - correct answer ✔✔cross-sectional images of the body
CT numbers are also known as - correct answer ✔✔Hounsfield units
2 advantages of CT over X-ray - correct answer ✔✔Elimination of SI of structures
Improvement of contrast resolution
Ring-shaped part of CT scanner. Many of the components necessary to produce and detect x-rays are
housed within - correct answer ✔✔Gantry
electromechanical devices called___ to provide continuous electrical power and electronic
communication across a rotating surface - correct answer ✔✔Slip Rings
Collect attenuation x-ray beam information. - correct answer ✔✔Detector Array
2 Types of filters in CT - correct answer ✔✔Shaped and Bowtie
The process of moving the table by a specified measure is most commonly called - correct answer
✔✔Incrementation
Cell Detectors should be __ to improve spatial resolution - correct answer ✔✔Small
Greater quantum efficiency of detectors equals better - correct answer ✔✔Contrast resolution
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 CA$26.13. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now