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OCTAVIUS® Detector 1600 MR

Detector Array for Patient Plan Verification and Quality Control of SRS Applications at MR-Linacs

These flat-panel ionization chamber arrays can be easily set up on the treatment couch. Combined with the OCTAVIUS 4D MR system, they provide a complete solution for 3D patient-specific plan verification. With a detector density and resolution perfectly adapted to the application, these dedicated MR-conditional OCTAVIUS detector arrays allow very reliable and accurate measurements of the dose delivered.

Key Features

  • Detector array with 1521 liquid-filled ionization chambers
  • Active volume 2.5 x 2.5 x 0.5 mm³ per chamber
  • Best available field coverage for SRS applications with a field size of 15 x 15 cm²
  • Detector spacing in central area: 2.5 mm
  • Filmless patient plan verification and machine-specific QA
  • Suitable for use with the OCTAVIUS 4D MR – the modular QA phantom

Best Available Field Coverage for MR Applications

OCTAVIUS Detector 1600 MR is an advanced detector array designed for patient plan verification and quality control in Stereotactic Radiosurgery applications using MR-Linacs
Multiple brain metastases:
Gold standard ionization chambers:
Largest SRS detector array with a well-established system:
High spatial resolution:
Multiple brain metastases:
OCTAVIUS Detector 1600 MR: Verification of stereotactic target volumes - Multiple brain metastases

Suitable for the OCTAVIUS 4D MR: Verification of stereotactic target volumes in the entire phantom volume

Gold standard ionization chambers:
OCTAVIUS Detector 1600 MR: Gold standard ionization chambers
  • Long lifetime
  • Stable and reliable signal independent from accumulated dose
  • No on-site recalibration
  • Good field coverage
  • Nearly water-equivalent
Largest SRS detector array with a well-established system:

Perfect field size for Single-Isocenter Multiple-Target Plans

  • Only one measurement for all PTVs: a time saving workflow
  • Coverage of all clinical relevant regions
High spatial resolution:
OCTAVIUS Detector 1600 MR: High spatial resolution

2,5 mm center to center

An Optimal Solution for SRS Treatments

Unique detector properties

With its very small detector size, OCTAVIUS Detector 1600 SRS is perfectly suited for the dosimetry of small fields.

Detector Features

  • Advancement of well-established OCTAVIUS Detector 1600 SRS
  • 1521 liquid-filled ionization chambers with an active volume
    of 2.5 x 2.5 x 0.5 mm³ (0.003 cm³)
  • Enlarged active detector area with 15 x 15 cm²
  • 729 ionization chambers in enlarged high-resolution inner area
    of 6.5 x 6.5 cm²
  • Spatial resolution 2.5 mm in inner area
  • Excellent error detection for all stereotactic treatment plans

Optimal size for multi target SRS treatments

Stereotactic treatments require high radiological and, most importantly, spatial precision which should be checked for each patient individually.
Due to its high spatial resolution (2.5 mm) and its large detector area of 15 x 15 cm² OCTAVIUS Detector 1600 MR allows patient specific QA of SRS treatments.

Recently TPS and Linac manufacturers introduced new solutions for efficient planning of SRS treatments of multiple target volumes with a single isocenter. These applications often include multiple widely-spaced target volumes easily covered with the large detector area of 15 x 15 cm².

Commissioning of SRS/SBRT techniques

PTW OCTAVIUS Detectors have proven to be accurate tools for planar dose measurements.

Especially for radiotherapy departments implementing SRS/SBRT delivery techniques into their clinical practice, OCTAVIUS Detector1600 MR can support and facilitate the commissioning process.

Technical Specifications

Type of product: Two-dimensional array with 1521 liquid-filled ionization chambers
Application: Patient plan verification
MR-conditional up to 1.5 T: yes
Measuring quantities: Absorbed rate and absorbed dose
Range of use: (0.1 ... 24) Gy/min
Resolution: 0.1 mGy, 0.1 Gy/min
Dead time: Zero
Display cycle: (100 ... 800) ms
Type of detectors: Plane-parallel, liquid-filled ionization chambers
Detector layout: Center area (6.5 cm x 6.5 cm): spacing 2.5 mm
Outer area (15 cm x 15 cm): spacing 5 mm
Nominal response: 16 nC/Gy
Size of detectors: 2.5 mm x 2.5 mm x 0.5 mm (0.003 cm³)
Active detector area: 15 cm x 15 cm
Outer dimensions: 300 mm x 420 mm x 22 mm (W x D x H)
Weight: 5.9 kg

Related Downloads

Brochure
MR-RT Products ( 2 MB )
Brochure
OCTAVIUS at MRIdian linac ( 2 MB )
Catalog
Radiation Medicine Catalog ( 10 MB )
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