TomoTherapy

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Looks like a CT scanner because it is a CT scanner, allowing efficient 3D CT imaging to be used for ensuring the accuracy of treatment for every patient, every day. For more on the history of this technology go here.

Delivers helical (continuous 360ยบ) IMRT that uses tens of thousands of narrow beamlets, all targeting the tumor and individually-optimized to contribute to the total tumor dose

Offers by far the most beamlets of any form of IMRT, which translates to the most precise conformal radiotherapy available (go here).