COMPUTED RADIOGRAPHY AND DIGITAL
RADIOGRAPHY-STUDY GUIDE
2024 QUESTIONS AND CORRECT ANSWERS
ALREADY GRADED A+
The two general types of digital radiographic systems are what? - Answer-
Computed Radiography (CR) and Digital Radiography (DR).
Digital radiography (DR) systems use detectors that employ _____________ or
_____________ conversion processors. - Answer-Direct or indirect.
How many bits are required to form a byte? - Answer-8.
How do you figure how many pixels comprise a matrix? - Answer-You multiply
the columns and rows together.
The overall dimension of the image matrix is termed the _______________. -
Answer-Field Of View (FOV).
Large matrix = ________ pixels. - Answer-Small.
Small pixels = ________ resolution - Answer-Greater.
Spatial resolution is also known as: - Answer-Detail.
The range of shades of gray that can be displayed on the digital image is
determined by the ______________. - Answer-Grayscale bit depth.
The grayscale bit depth ranges from ____ to ____. - Answer-8 to 32.
The ____________ the bit depth, the more shades of gray there will be. - Answer-
Greater.
What are the 3 primary types of image processing operations? - Answer-
1. Histogram.
2. LUT.
3. Windowing.
, COMPUTED RADIOGRAPHY AND DIGITAL
RADIOGRAPHY-STUDY GUIDE
2024 QUESTIONS AND CORRECT ANSWERS
ALREADY GRADED A+
What does LUT stand for? - Answer-Look up Table.
What are the 3 types of noise that can affect a digital image? - Answer-
1. System noise.
2. Ambient noise.
3. Quantum Mottle.
Noise that does not affect the image: - Answer-System noise.
Noise that will affect the image, causing it to look foggy because of scatter: -
Answer-Ambient noise.
Noise that occurs when the incorrect use of kVp or mAs is used: - Answer-
Quantum Mottle.
SNR stands for: - Answer-Signal to Noise Ratio.
True or False:
You want more signal and low noise. - Answer-True.
What does DQE stand for? - Answer-Detective Quantum Efficiency.
A measure of the sensitivity and accuracy by which the IR converts the incoming
data to the out-put viewing device. - Answer-DQE.
The comparison of the actual exposure received by the IR and the proper exposure
that should have been received. - Answer-Deviation Index (DI).
CT was invented in ________. - Answer-1970.
CT stands for: - Answer-Computed Tomography.
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 Joealvin. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $26.49. You're not tied to anything after your purchase.
