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Relationship between microbleed detected by quantitative susceptibility mapping (QSM) and presentation of severe headache suggestive of SH.
| Subjects with Presentation of Severe Headache Suggestive of SH | |||
|---|---|---|---|
| Positive | Negative | ||
| Subjects with | Positive QSM | 11 | 0 |
| Negative QSM | 0 | 29 | |
Abbreviations: QSM = quantitative susceptibility mapping; SH = sentinel headache.
