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| index [2022/01/24 21:55] – Kristen Scheitler, MD @k_scheitler Via Twitter administrator@icnapedia.org | index [2022/01/24 22:21] – administrator@icnapedia.org | ||
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| ~~AUTHORS: | ~~AUTHORS: | ||
| - | ====== Quick yet systematic approach to MR imaging of brain lesions ====== | ||
| - | |||
| - | 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, | ||
| - | {{:: | ||