Elements · ← Hg Mercury · Pb Lead →
Radioactive thallium-201 was developed to image blood flow in heart muscle.
| Symbol | Tl |
|---|---|
| Atomic number | 81 |
| Standard atomic weight | 204.383 |
| Group | 13 |
| Period | 6 |
| Block | p-block |
| Category | Post-transition metal |
| Standard state | Solid |
| Discovered | 1861 |
Source: PubChem, Thallium (periodic table data, retrieved 2026-10-19). Group and period follow the standard 18-column periodic table.
Strauss and colleagues found thallium-201 concentrated in mouse heart muscle more than potassium-43 or rubidium-81, matched regional blood flow in dogs, suggesting it could be used to evaluate regional myocardial perfusion.
As reported in: Strauss, Harrison, Langan et al. (1975). Thallium-201 for myocardial imaging. Relation of thallium-201 to regional myocardial perfusion.. Circulation. doi:10.1161/01.cir.51.4.641
Search Google Patents for thallium in biological and medical uses: all patents · recent applications (2022+)
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