Exam (elaborations)
computed tomography questions with correct answers resptively.
- Course
- Institution
computed tomography questions with correct answers resptively.
[Show more]
Seller
Follow
Content preview
computed tomography questions withcorrect answers resptively.
what term is applied to a single square, or picture element, in the image display matrix ANS - pixel
what determines the amount of data displayed on the monitor ANS - field of view
a volume element is called ANS - voxel
a relative comparison of x-ray attenuation of a voxel of tissue to an equal volume of water ANS - CT
number
what is the CT number of water ANS - 0
the major system components of a CT scanner ANS - gantry
computer and operators console
patient table
a circular device that houses the x-ray tube, DAS, and detector array is called ANS - gantry
x-ray tubes used in advanced CT scanners can tolerate ANS - 4 to 5 MHU
these can be selected at the operators console ANS - slice thickness
table index
imaging technique factors
the range of CT numbers that are used to map signals into shades of gray is called ANS - window width
, the midpoint of the range of gray levels to be displayed on the monitor is the ANS - window level
a narrow window width would display ANS - high contrast
the window level should be set to ANS - the CT number of the tissue of interest
CT is the examination of choice for ANS - head trauma
the amount of blurring in a CT image is termed ANS - spatial resolution
the ability to differentiate between small differences in density within the CT image is called ANS -
contrast resolution
the most significant geometric factor that contributes to spatial resolution ANS - detector aperture
width
random variation in photon detection results in ANS - quantum noise
these contribute to image noise in CT ANS - detector aperture width
matrix size
patient size
metallic objects, such as dental fillings can cause ANS - artifacts
high resolution CT scans are made using ANS - thinner sections or slices
which are quality factors affected by x-ray beam energy ANS - contrast resolution
noise
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 $9.69. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
