OCTAVIUS® Detector 1600 SRS
Detector array for patient plan verification and quality control of SRS applications
OVERVIEW
- Detector array with 1521 liquid-filled ionization chambers
- Filmless patient plan verification and machine-specific QA
- Suitable for use with OCTAVIUS 4D system - the modular phantom for IMRT, VMAT and SRS/SBRT
- Verification of single-isocenter treatments of multiple metastasis
- Active volume 2.5 x 2.5 x 0.5 mm³
- Detector spacing in center area: 2.5 mm
- Best available field coverage for SRS applications with a field size of 15 x 15 cm²
Unique Properties - Optimal for SRS Treatments
OCTAVIUS® Detector 1600 SRS -
Unique Detector Properties
- Advancement of well-established OCTAVIUS® Detector 1000 SRS
with > 50% more chambers - 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
- For filmless patient plan verification and machine specific QA
- 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.
Besides 2D patient plan verification OCTAVIUS Detector 1600 SRS allows independent 3D patient plan verification when combined with OCTAVIUS 4D. Due to its high spatial resolution (2.5 mm) and its large detector area of 15 x 15 cm² OCTAVIUS 1600 SRS allows patient specific QA of SRS treatments, especially of those including multiple, widely-spaced target volumes (e.g. multiple metastases in stereotactic brain applications).
- 3D verification of multiple, widely-spaced target volumes within a single measurement >> No repeated and time-consuming measurements of individual/grouped target volumes requiring couch/detector shifts
- Calculation of 3D volume gamma metrics and translational offsets for evaluation of radiological and mechanical precision
Recently TPS and Linac manufacturers introduced new solutions
for efficient planning of SRS treatments of multiple target
volumes with a single isocenter (e.g. Varian HyperArc and
Brainlab Elements® Multiple Brain Mets SRS). These applications
often include multiple widely-spaced target volumes easily
covered with the large detector area of 15 x 15 cm².
OCTAVIUS® 4D with 1600 SRS + Top SRS plus (Ø 21 cm)
Patient specific phantom adaptation
For measurements with OCTAVIUS 4D the OCTAVIUS Detector 1600 SRS can be used with the OCTAVIUS Top SRS plus. With a diameter of 21 cm the resulting homogeneous cylinder geometry adapts the anatomy of a human head perfectly in SRS treatments of the brain.
In addition, for either SBRT procedures (e.g. stereotactic treatment of lung metastases) or other clinical entities the OCTAVIUS Detector 1600 SRS can be combined with the 32 cm OCTAVIUS Top Standard, emphasizing its multifunctional nature.
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 1600 SRS can support and facilitate the commissioning process.
VeriSoft takes arbitrary couch angles into account
True verification of non-coplanar SRS treatments
Conventional SRS treatments and especially modern single isocenter SRS treatments, such as Varian HyperArcTM or Brainlab Elements® Multiple Brain Mets SRS, use a mixture of coplanar and non-coplanar beams improving the dose conformity.
Together with OCTAVIUS 4D the new OCTAVIUS Detector 1600 SRS represents an ideal tool for true 3D verification of SRS treatments with non-coplanar beams.
- True & simple 3D verification of SRS deliveries with non-coplanar beams – verification of the real patient plan with couch angles collapsed to 0°
- Arbitrary couch angles up to 90°/270° supported - no limitations of couch angles with respect to beam quality
