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index [2022/01/24 21:55] – Kristen Scheitler, MD @k_scheitler Via Twitter administrator@icnapedia.org | index [2024/03/23 20:48] (current) – biju.hameed@gmail.com | ||
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- | ~~AUTHORS:off~~ | + | ~~DISCUSSION:off~~ |
- | ====== Quick yet systematic approach to MR imaging of brain lesions ====== | + | |
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- | In general, there are 4 MR sequences that will tell you 99% of what you need to know: | + | |
- | + | ||
- | 1. T2 FLAIR | + | |
- | 2. T1 post-contrast | + | |
- | 3. DWI | + | |
- | 4. GRE/ | + | |
- | + | ||
- | 1. T2 FLAIR: "What is grossly abnormal?" | + | |
- | anything abnormal = bright on T2 FLAIR | + | |
- | 2. T1+gadolinium*: | + | |
- | + | ||
- | Also: | + | |
- | -"What is the vascular composition?" | + | |
- | always compare T1+gad sequences to pure T1 without contrast (if also bright on pure T1, then BBB not necessarily disrupted) | + | |
- | {{:: | + | |
- | 3. DWI*: | + | |
- | bright = abnormal = " | + | |
- | **the above applies only if the corresponding area is dark on ADC sequence (if also bright on ADC, then just T2 shine-through)** | + | |
- | {{:: | + | |
- | 4. GRE/ | + | |
- | in general, abnormal = dark (blood, vascularity, | + | |
- | {{:: | + |