Difference between revisions of "Radiology Pearls"
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*DWI: bright areas are suspicious for infarcts, but can also be T2 shine-through. [[Dating Infarcts|Dating the chronicity of infarcts]] can be done with T1 and T2. | *DWI: bright areas are suspicious for infarcts, but can also be T2 shine-through. [[Dating Infarcts|Dating the chronicity of infarcts]] can be done with T1 and T2. | ||
*ADC: dark areas on ADC are infarcts, and should correlate with bright areas on DWI. | *ADC: dark areas on ADC are infarcts, and should correlate with bright areas on DWI. | ||
| − | *In phase/Out of phase | + | *GRE: In phase/Out of phase. Most sensitive for assessing iron deposits, steatosis. |
*T2-star: | *T2-star: | ||
*FLAIR: heavily T2-weighted image which suppresses CSF | *FLAIR: heavily T2-weighted image which suppresses CSF | ||
Revision as of 21:14, 15 March 2022
Resources
- https://www.radiologyeducation.com (links to most of the major radiology websites and a lot of free resources)
- eAnatomy is an excellent tool for understanding MRIs. It’s $30 a year (if you have a free membership, unclear which membership).
- Radsource is another good resource.
- http://radiologyassistant.nl/
MRI
- Nomenclature: use "intensity".
Sequences
- T1: pancreas (due to Mn2+ deposition in the pancreas), fat, protein, hemorrhage, melanin, and gadolinium.
- T2: fluid (excluding blood)
- DWI: bright areas are suspicious for infarcts, but can also be T2 shine-through. Dating the chronicity of infarcts can be done with T1 and T2.
- ADC: dark areas on ADC are infarcts, and should correlate with bright areas on DWI.
- GRE: In phase/Out of phase. Most sensitive for assessing iron deposits, steatosis.
- T2-star:
- FLAIR: heavily T2-weighted image which suppresses CSF