URR Abdomen Physics & Clinical Questions And Answers Latest Updates
9 views 0 purchase
Course
URR Abdomen Physics & Clinical
Institution
URR Abdomen Physics & Clinical
Color Doppler demonstrates (x2) - average velocity & direction of flow
Which artifacts will be seen with needles? (x3) - - Propagation speed artifact
- Reverberation AKA resonance artifact
- Bayonet artifact
What happens if you decrease the color threshold? - reduce the color displayed
- color...
For renal artery doppler evaluation, the angle should be _____. For intraparenchymal arteries, the angle
should be _____. - - main RA = <60
- intraparenchymal = <20
Increasing _____ will most improve the ability to properly trace the contour of Doppler waveform. -
Sweep speed
A simple cyst could have artifactual debris in it in case of (x2) - - short distance from the
transducer
- volume averaging
,A contrast agent that consists of a cellulose suspension can better visualize which organ? -
pancreatic tail
Which artifact occurs when sampling vessels adjacent to a highly reflective structure like a bone? -
Cross talk
- mirror image of the waveform on the other side of the baseline
Harmonic imaging increase (x3) and decrease (x3) - Increase
- spatial resolution
- contrast resolution
- signal to noise ratio
Decrease
- reverberation
- beam aberration
- side lobes
If you have trapezoidal field of view on linear array, which resolution are you degrading? - lateral
resolution
- Trapezoidal = 台形
- wider beams = less lateral resolution
The number of lines of information used to create the color displayed on the image is called -
Packet size
- increase packet size = increase color display
Sample angle controls the amount of color fill in a vessel evaluated with color Doppler. T/F - True
- angle DOES matter to color filling
, File type for PACS system - DICOM = Digital Imaging & Communications in Medicine
Name of transducer; order of the term in the name - 1. Shape of the transducer comes first
2. phased/sequential comes second
e.g.
- sector phased array
- linear sequential array
The bayonet artifact is - a type of propagation speed error, the tip of the needle appears curved
When you are scanning MSK, you see this artifact; if the transducer is not parallel to the _____, it falsely
appears hyperechoic/hypoechoic. - Anisotropy
- scanning tendon
- appears falsely hypoechoic (hypo=abnormal)
- rock the transducer to make it parallel to the tendon
How do you reduce the clutter/flash on a color Doppler image? - Decrease color
priority/threshold
In case of contrast live ultrasound, the mechanical index should be ______. Then turn on _____, and
focal zone should be placed at ______ - - Mechanical Index = low (<1.0) → prevent cavitation of
microbubbles
- turn on harmonics
- focal zone at the area of interest
Specular reflection occurs with - a large smooth structure = diaphragm
- echogenic appearance
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 ACADEMICMATERIALS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
