When Small Size Matters.

OCTAVIUS® 1000 SRS

The First Liquid-Filled Ionization Chamber Array
for SRS/SBRT Patient and Machine QA

Key Features

  • Detector of choice for small-field IMRT and SRS/SBRT treatment techniques
  • The first two-dimensional detector array based on liquid-filled ionization chamber technology - high spatial resolution, minimal energy dependence
  • 977 liquid-filled ionization chambers on a 10 cm x 10 cm field
  • Very small detector size - 2.3 mm x 2.3 mm x 0.5 mm
  • Highest spatial resolution - detector spacing 2.5 mm
  • Complete field coverage on 5 cm x 5 cm
  • For use with OCTAVIUS 2D and 4D systems

Application Highlights

  • Outstanding resolution - highly accurate dose measurements of very small regular and irregular field and regions with steep dose gradients
  • Excellent sensitivity - measures single MUs
  • Suitable for high-definition MLC QA
  • Dose rate up to 36 Gy/min - suitable for FF and FFF beams
  • Machine QA with FFF analysis (optional)
  • Optional accessories for CyberKnife patient QA
  • 4D dosimetry optionally available

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What Users Say


"Especially in situations with rapidly changing dose gradients in which a high spatial resolution is needed (such as for IMRT or stereotactical treatments), the detector array offers a high spatial resolution with minimal energy dependence."  

Poppe et al.: Properties of a liquid filled ionization chamber array, Med. Phys. 40 (8), August 2013

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