Exam (elaborations)
PHYS1250 Image Quality in Diagnostic Radiography2024
- Course
- Institution
PHYS1250 Image Quality in Diagnostic Radiography2024
[Show more]
Seller
Follow
Schoolflix
Reviews received
Content preview
PHYS1250 Image Quality in DiagnosticRadiography2024
Image Quality
1. Radiographic Contrast
2. Geometric Properties
1. Radiographic contrast
1. Subject Contrast
2. Detector Contrast
6 Ways to Show Appreciation for Your Child's Teacher
2. Geometric Properties
1. Detail
2. Distortion
Radiographic Contrast
- Describes the differences between shades of grey in an image
- Allows us to distinguish anatomical parts from each other
- Subject contrast: differences in x-ray intensities emerging from the patient
- Detector contrast: how many x-rays hit the detector that get picked up by detector
, 1. Subject Contrast
Things that affect this are:
- Applied kVp
Increased voltage = more penetration through body = less attenuation = more radiation hitting detector BUT =
less subject contrast due to scattered radiation
- Anatomical Differences
Greater differences produces higher contrast
Differential absorption= Photoelectric Effect
- Contrast Mediums in cavities to increase contrast
kVp
- More penetration
- Increase in voltage
- More dose
- Less contrast due to more scatter
- Use of filters, grids introduced
- If kVp goes up mAs goes down to balance it out (the amount of x-rays)
Filters
- Most common = Aluminium (Al)
- Removes low energy x-rays which get totally absorbed from patient
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 Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now