systemElektaLinear Accelerator

Elekta Synergy

Manufacturer: Elekta · Modality: Linear Accelerator

The linac that brought kV cone-beam CT image guidance to the mainstream (2003) — the first Elekta-branded linac with integrated XVI kV-CBCT IGRT. Shipped 2003 through ~2015. Direct competitor to the Varian Clinac iX and Trilogy in that era. Large installed base still operating clinically.

What Synergy established

  • kV-CBCT as clinical standard — before Synergy, IGRT was mostly MV imaging (poor soft-tissue contrast). Synergy's kV flat-panel + rotational acquisition produced diagnostic-grade CBCT.
  • Integrated XVI console — CBCT acquisition and registration workflow integrated with treatment delivery.
  • MLCi2 collimator (80-leaf).
  • Agility upgrade path — later Synergy upgrades to Agility 160-leaf MLC bridged to Versa HD.

Specs

  • 6, 10, 15, 18 MV photon options
  • Electron energies 4–18 MeV
  • MLCi2 (80-leaf) or Agility (160-leaf, later upgrades)
  • XVI kV-CBCT for IGRT
  • iViewGT MV portal imaging
  • Integrity control system (software)

Clinical positioning

Legacy workhorse linac. A refurbished Synergy with Agility MLC + XVI + current control software is still clinically capable for routine IMRT/VMAT workloads. Competes at the used-market entry tier with refurbished Clinac iX units.

Successor

Versa HD — significant upgrade: higher dose rate, Agility MLC standard, Symmetry 4D CBCT, updated dosimetry.

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