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Comparison of TAS and TVS
| TVS | TAS | |
|---|---|---|
| Full bladder | Not essential | Essential |
| Probe frequency | 5-7.5 MHz | 3-5 MHz |
| Resolution | Very high | Moderate |
| Field of view | Small | Large |
| Contraindications | Virgins, Vaginal obstruction Premature rupture of membrane |
None |
| Interventional uses | Many uses | Limited role |
