| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 | Vienna, Austria | — | — | IMRT, VMAT, IGRT, stereotactic radiosurgery, Elekta Versa HD | — | Elekta Versa HD accelerator with sub-millimeter precision via HexaPOD couch. Advanced IMRT, VMAT, IGRT techniques target kidney cancer while sparing healthy tissue. | World's Best Hospitals 2026 by Newsweek |