Products

TomoHelical™, the TomoTherapy System’s flagship helical mode of treatment, combines 360° fan-beam delivery of intensity-modulated radiation therapy (IMRT) and megavoltage CT (MVCT) imaging for a gold-standard treatment and targeting of complex tumors.

Other technologies have tried to approximate the beamlet-based helical delivery principle that TomoTherapy technology introduced almost a decade ago with its TomoHelical modality. But none offer the ability to as intricately modulate radiation dose intensity, along with delivery angle across three dimensions, to produce as conformal dose distributions as the TomoTherapy Systems.

The TomoHelical modality enables the delivery of thousands of narrow beamlets, which are individually optimized to target the tumor. The TomoHelical mode maximizes conformality and uniformity of dose to the tumor while minimizing exposure to healthy tissue.

With TomoHelical, the user is able to create a treatment plan that defines dose goals for the targeted tumor, dose constraints for structures that must be avoided, the level of modulation for the plan and the fractionation schedule.

During treatment delivery, the linear accelerator completes multiple 360° rotations around the patient while the couch passes through the center bore of the system. And, with its continuous, high dose rate delivery, beam-on times are short compared with many other types of radiation treatment.