Exam (elaborations)
Computed Tomography: Module 2 Principles, Parameters, and Display fully solved graded A+
- Course
- Institution
Computed Tomography: Module 2 Principles, Parameters, and Display fully solved graded A+
[Show more]
Content preview
Computed Tomography: Module 2Principles, Parameters, and Display
What are the three major components of the CT system? - correct answer ✔✔1. Gantry & patient table
2. A computer capable of processing CT date
3. An operators console
The patient table is usually made of _________ because __________ - correct answer ✔✔Carbon Fiber;
the material will absorb the least amount of radiation and support the weight of the patient
What two things does the patient table determine? - correct answer ✔✔1. Which part of patient
anatomy is scanned
2. The speed at which the patient is scanned
What setting controls the movement of the table through the gantry? - correct answer ✔✔Pitch Setting
What is the pitch setting? - correct answer ✔✔The distance the table travels during one revolution of
the tube
How is pitch expressed? - correct answer ✔✔as a ratio of table speed to slice thickness
speed:thickness
In SDCT , a pitch of ____ provided the best image quality - correct answer ✔✔1
With MDCT, how do we determine slice thickness? - correct answer ✔✔by turning on more of less
detectors as well as collimation
also by the reconstruction algorithm used after the acquisition instead of collimated beam width
, Beam pitch= - correct answer ✔✔table movement per rotation/ beam width
Increased pitch = _______ Scan speed, _______patient dose, _________ image quality - correct answer
✔✔Increased scan speed, decreased patient dose, decreased image quality
If pitch is increased by a factor of 2, what happens to patient dose? - correct answer ✔✔It is decreased
by 1/2
x-axis gantry movement refers to - correct answer ✔✔left to right movement
y-axis gantry movement refers to - correct answer ✔✔anterior to posterior movement/vertical
positioning
axis movement refers to - correct answer ✔✔superior to inferior/axial plane
All locations on the patients body are measured in - correct answer ✔✔millimeters
The gap between each coil or ridge of the helix is called a - correct answer ✔✔z-gap
as pitch decreases, z-gap ______, patient dose_____, and image quality______ - correct answer
✔✔decreases, increases, increases
What does the gantry house? - correct answer ✔✔Slip rings, Generator, Cooling system, X-ray source,
Filtration, Collimation, Detectors, data acquisition system
Most scanners can tilt - correct answer ✔✔12-30 degrees
What is the anodes speed - correct answer ✔✔3,600-10,000 rotations per minute
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 $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now