Exam (elaborations)
Computed Tomography questions with correct answers respectively.
- Course
- Institution
Computed Tomography questions with correct answers respectively.
[Show more]
Seller
Follow
Content preview
Computed Tomography questions with correct answers respectively.The word Tomo is tomography means ANS - To cut
What is the Z-axis ANS - the thickness of a cross-sectional slice.
The degree to which an x-ray beam is reduced by an object is referred to as ANS - Attenuation
The amount of the x-ray beam that is absorbed per unit thickness of the absorber ANS - Linear Attenuation
difference in linear attenuation coefficient is responsible for ANS - Image Contrast
These are the two dimensional squares of the matrix ANS - Pixels
The 3d dimension of the matrix are known as ANS - Voxels
Number of pixels in a matrix are product of number of ANS - Rows and columns
Beam attenuation of CT are measured in ANS - Hounsfield Units
Scan Data is the same as ANS - Raw Data
The ability of a system to define small objects distictly ANS - Spatial Resolution
This image quality's criteria refers to the speed at which the data can be acquired ANS - Temporal Resolution This image quality criteria is the ability to differentiate objects with similar densities ANS - Contrast Resolution
Multi slice is defined as _ to _ slices per gantry ANS - 4 to 320
the time required to acquire all x-ray projections that are needed to reconstruct one CT image ANS - Temporal resolution
2 advantages of volume scanning are ANS - shorter scan times
scanning more volume of anatomy
A single image reconstructed from a volume of acquired data. ANS - Slice
he group of slices which make up a particular examination ANS - Scan
Refers to a single exposure which results in an image much like a conventional x-ray ANS - Localizing Scan
determines how many detector cells collect data ANS - Scan field
determines what portion of the scan field of view is reconstructed ANS - field of view
This centre point is called ANS - display field of view centre
defined as the x and y distance from isocentre in cm ANS - display field of view centre
These mathematical algorithms help generate 2-D axial images from the spiral (3-D volumetric) data ANS - 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 ANS - narrow window width
more shades of grey are expressed with ANS - wide window width
Ct provides us wih ANS - cross-sectional images of the body
CT numbers are also known as ANS - Hounsfield units
2 advantages of CT over X-ray ANS - 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 ANS - Gantry
electromechanical devices called___ to provide continuous electrical power and electronic communication across a rotating surface ANS - Slip Rings
Collect attenuation x-ray beam information. ANS - Detector Array
2 Types of filters in CT ANS - Shaped and Bowtie
The process of moving the table by a specified measure is most commonly called ANS - Incrementation
Cell Detectors should be __ to improve spatial resolution ANS - Small
Greater quantum efficiency of detectors equals better ANS - Contrast resolution
The greatest innovation in CT since the advent of CT itself ANS - high speed or slip ring scanners
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 Professorkaylee. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78140 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now