Exam (elaborations)
MRSO EDUCATIONAL MODULES EXAM
- Course
- Institution
MRSO EDUCATIONAL MODULES EXAM ...
[Show more]
Seller
Follow
Content preview
MRSO EDUCATIONAL MODULES EXAM2024-2025
ANSWER: Static Magnetic Field poses hazards to our patients by involving
materials with unique qualities.
Magnetic Properties - ANSWER -When placed in a strong magnetic field,
molecules exhibit characteristics that are dependent on their quantum state and
temperature.
ANSWER: Diagmagnetism exhibits a weak repulsive force in the presence of a
strong static magnetic field.
ANSWER: Paramagnetism exhibits a mild attractive force in the presence of a
strong static magnetic field.
ANSWER: Ferromagnetism exhibits a significant attractive force in the presence of
a static magnetic field.
-this attracting force is retained in the ferromagnetic object for a length of time
even after leaving the static field.
Basic Units of Measurement - ANSWER: static magnetic field
-Magnetic flux
-Millitesla (mT)
-Gauss (G).
– Tesla (T)
ANSWER: This relates to the direction and strength of a static magnetic field.
,-represents as B0 (B Zero)
ANSWER: Magnetic flux is the magnetic force that surrounds a magnetic source
Millitesla: ANSWER -mT
Gauss (G) - Answer: -1 mT
-5 G = 0.5 mT
Tesla (T) - Answer -10,000 Gauss = 1 T.
Lines of Flux - ANSWER: invisible lines.
-fringe field.
-vector directions.
-Short bore vs. Long bore
Invisible Lines - ANSWER - force that flows from a magnet's north pole to the
south pole
Fringe Field - A field that extends outside the MR unit.
-varies in strength as you approach closer to the MR unit.
Vector Directions - Answer: vertical or horizontal
Short bore vs long bore - ANSWER: Short bores have strong spatial gradients.
, Magnetic Spatial Gradient - ANSWER -Fringe field spreading outside the MR unit
-used to describe the change in strength of the magnetic field as we approach the
MR unit.
-Magnetic fields have layers, just like onions.
- Measured in dB/dx.
In other terms, T/m or G/cm.
-1 T/m equals 100 G/cm
Isogauss Plot - ANSWER - provides the exact field strength at a given place in the
MR unit.
-plot must show specific strengths.
-0.5 mT (5 gauss) to 200 mT (2 000 gauss)
-must be located in Zone IV.
-field strengths > 5 G describe the MR environment.
-shows how well a room is shielded.
The steeper distribution of magnetic field at the MR unit suggests shielding.
Risks Associated with Static Magnetic Field - ANSWER: translational force
(missile effect).
-shielding
-maximum spatial gradient and force product
Translational force (missile effect) - ANSWER: magnetic spatial gradient
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 Humat. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now