X-ray tubes should undergo the warm-up procedure again after they have been idle for more
than: - ✔✔1 hour
What is the heat unit (HU) of the anode if 200 mA, 0.10 sec., and 80 kVp is used on a single-
phase generator? - ✔✔1600
How many heat units (HU) are generated on a high frequency (HF) generator if an exposure
time of 300 mA, 0.12 sec., and 95 kVp is used? - ✔✔3,420
What will help prolong the life of an x-ray tube? - ✔✔1. warm up the anode each morning
2. use low ma setting whenever possible
3. use the low-speed rotor whenever possible
Which of the following x-ray generators produces the greatest amount of x-rays for the same
exposure technique? - ✔✔High-frequency
Radiographic contrast is controlled by the: - ✔✔kVp
The quantity, or number of photons produced per second during an exposure is controlled by
the: - ✔✔mA
The variation in tissue densities within the patient is referred to as the: - ✔✔Subject contrast
,The overall contrast seen in the radiographic image is referred to as: - ✔✔Radiographic
contrast
What are considered a part of shape distortion? - ✔✔foreshortening
elongation
The unsharp edges of a body part are referred to as the: - ✔✔Penumbra
What would be considered involuntary motion? - ✔✔1. tremors
2. peristalsis
3. heartbeats
Quantum mottle is typically seen on the radiographic image when using: - ✔✔high mA, high
kVp techniques
The primary controlling factor of penetration of x-rays is: - ✔✔kVp
The term used in the new digital imaging environment to replace density is: - ✔✔Brightness
The geometric factors that affect the formation of the image are: - ✔✔1. SID
2. OID
3. Focal spot
When using computed radiography (CR), where is the latent image stored until it is processed? -
✔✔In a photostimulable phosphor plate
Digital imaging requires that the exposure technique is accurately set. Which of the following is
the most critical of the exposure factors? - ✔✔kVp
, One of the major advantages of using CR or DR systems is the: - ✔✔The ability to see images
very fast
All of the digital images made in an x-ray department are stored in a system called the: -
✔✔PACS
When a CR plate is inserted into the reader for processing, the phosphor is scanned with a: -
✔✔Laser beam.
What is the size of the flat-panel detector inside the table of a DR system? - ✔✔17 x 17 in.
The viewing monitor's active viewing area is called a: - ✔✔Matrix
The amount of detail or sharpness in the digital image is termed: - ✔✔Spatial resolution
Which control on the viewing station control the density, or brightness, in the radiographic
image? - ✔✔Window level
Which of the following tells the operator that the correct exposure has been received by the
phosphors in the imaging plate? - ✔✔Exposure indicator number
The negative effect of scatter radiation reaching the image receptor (IR) is: - ✔✔Fog
Scatter radiation can be controlled by: - ✔✔1. grids
2. reducing field size
The effectiveness of a radiographic grid is determined by the: - ✔✔Grid ratio
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 Examsplug. 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.
