MRI QUIZ: QA/QC QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
3 views 0 purchase
Course
GXMO
Institution
GXMO
MRI QUIZ: QA/QC QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
Gradient amplitude is defined as the - ANSWER o Strength of the gradient
The gradient rise time is defined as - ANSWER o the time it takes for the gradient to reach its full amplitude, measured in microseconds mT/m (milliTesla/meter) or ...
MRI QUIZ: QA/QC QUESTIONS AND ANSWERS
WITH SOLUTIONS 2024
Gradient amplitude is defined as the - ANSWER o Strength of the gradient
The gradient rise time is defined as - ANSWER o the time it takes for the gradient to reach its full
amplitude, measured in microseconds mT/m (milliTesla/meter) or G/cm (Gauss/centimeter)
What is the gradient slew rate - ANSWER o the speed rate of ascent or descent of a gradient from zero to
its maximum amplitude, either positive or negative. Which is the amplitude divided by the rise time in
msec. Measured in mT/m/msec or T/m/sec
o The strength of the gradient over a specific distance is another way to define the slew rate
Gradients with a shorter rise time will have _____ resolution capabilities and ____ available slices per TR
- ANSWER o Better, more
How can we convert T/M to gauss/cm ex 3.5 T/m - ANSWER o Move decimal two places to the right - 3.5
x 100 3.5 T/m = 350 Gauss / centimeter (G/cm)
What is the duty cycle - ANSWER o the time the gradients are on during a TR period, the "gradient
working time."
What parameters affect the duty cycle - ANSWER o Increasing number of slices
o Using FS sequences
o Using presat slabs/bands
o Increasing ETL
What is the primary cause of noise in the MR scan room - ANSWER o Rapid, successive switching of the
gradient coils
To get an oblique slice what must happen with the gradients - ANSWER o Both gradients in the planes
selected will come on during slice select
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 Performance. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.