Exam (elaborations)
CT - Chapter 1 - Intro to CT by Seeram questions with 100% correct answers.
- Course
- Institution
CT - Chapter 1 - Intro to CT by Seeram questions with 100% correct answers.
[Show more]
Seller
Follow
Content preview
CT - Chapter 1 - Intro to CT by Seeramquestions with 100% correct answers.
What is a specialized x-ray procedure that involves the measurement of x-ray attenuation passing
through a given part of human anatomy called? ANS - Computed Tomography (CT)
What measures the non-absorbed x-rays that pass through anatomical structure and send this
information to a computer for reconstruction called? ANS - Radiation Detectors
What involves using mathematical equations (algorithms) to create an image of a specific section of the
body for display on a cathode ray tube (CRT) called? ANS - Reconstruction
How does Computed Tomography differ from conventional radiography? ANS - The resulting images are
cross-sections, rather than superimposition of tissues.
In conentional radiography, the ____ and ____ of the patient is a factor in determining how much of the
x-ray beam is absorbed (attenuated) by the patient and how much passes through the patient. ANS -
composition and size
The formation of CT images by a CT scanner involves what 3 major steps? ANS - 1. Data Acquisition, 2.
Image Reconstruction, and 3. Image Display, Manipulation, Storage and Communication
What involves the collection of x-ray transmission measurements from the patient?
-- Once x-rays have passed through the patient, the attenuated rays fall onto special detectors that
measure the transmission or attenuation values. ANS - Data Acquisition
What are a collection of all the signals obtained from all the detectors at a given position of the x-ray
tube and detector unit within the CT scanner? ANS - Attenuation profiles
With data acquistion and attenuation profiles, the information is then turned into electrical signals that
are sent to the computer as ___ ____ for processing. ANS - Raw data
, with image reconstruction, before the raw data can be used by the computer, the electrical signals must
be converted into ___ (___) data for input into the computer. ANS - Digital (numerical)
The computer uses a mathematical calculation called ___ ___ to reconstruct the CT image. ANS - Back
Projection
The reconstructed image is in ____ form and must be converted back to ____ _____ for analog viewing
on the television monitor. ANS - Numeric, electrical signals
With image display, ___ ___ images are created from the digital data. ANS - Gray scale
What is it called when images can be modified by the technologist through image manipulation to make
them more useful for the physician/ radiologist. (Ex. transverse images can be reformatted into coronal
or sagittal sections). ANS - Multiplanar Reconstruction
The CT image is composed of a range of CT numbers ( ___ to ___ for a total of ____ ) that represent
varying shades of gray. ANS - -1000 to +1000 for a total of 2000
The process of changing the CT image gray scale is termed ___. ANS - Windowing
What is one of the major motivating factors for the development of 3D imaging? ANS - To improve the
communication gap between the radiologist and surgeon.
How does 3D imaging manipulation work? ANS - Special software gathers information from the
transverse scan data to display 3D images.
What are 7 clinical applications for 3D CT imaging? ANS - Facial fractures, musculoskeletal injuries,
central nervous system, Cardiovascular and pulmonary system, GI, GU, Radiation therapy treatment
planning
T or F: Images can be recorded and subsequently stored in some form of archive, typically printed on
film by a laser camera, or on optical disk. ANS - True
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 $9.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now