STARCHECK 2D Chamber Array
STARCHECK is a precise and reliable tool for fast measurements in radiation therapy beams. Typical applications are quality control and Linac beam adjustment measurements with the detector panel embedded in a solid state phantom. The ionization chambers feature excellent relative response stability, avoiding the need of frequent recalibration Their spatial resolution of only 3 mm ensures precise measurements even in penumbra regions. The scanning lengths covered by 527 detectors distributed 25.2 cm along the principal axes and 34.5 cm along the diagonals. A full set of four profiles is measured in real-time, making STARCHECK useful for start-up behavior checks of the Linac. Additional detectors distributed along the array’s side axis allow checks of MLC leave positions.
The optional FIELDCHECK and BQ-CHECK phantoms extend the scope of the STARCHECK system allowing to measure the congruence of light and radiation field and to check the constancy of the beam quality of high energy photon and electron beams.
STARCHECK maxi has been designed especially for measurements of high-resolution star profiles for radiation fields up to 40 x 40 cm. The higher scanning lengths covered by 707 detectors distributed 40 cm along the principal axes and 56.5 cm along the diagonals are the only difference to STARCHECK. The MR variant STARCHECK maxi MR supports measurements on MR linacs.
All STARCHECK systems are supported by the real time analysis software BeamAdjust and the machine quality control software MultiCheck.
- Bronze / Silver / Gold Service Contracts for STARCHECK systems are available.
ACCESSORIES
STARCHECK systems include the following components:
- STARCHECK Detector
- STARCHECK with 527 vented ionization chambers
- STARCHECK maxi with 707 vented ionization chambers
- STARCHECK maxi MR with 707 vented ionization chambers
The array includes a detector interface for power supply and data transfer.
- MultiCheck software
Advanced software platform for constancy checks on medical linear accelerators performed with STARCHECK or OCTAVIUS detectors. - BeamAdjust software
Intuitive, versatile QA software for real-time beam profile visualization with STARCHECK or OCTAVIUS detectors.
- BQ-CHECK phantom
Test object for constancy checks of photon and electron beam qualities using STARCHECK, OCTAVIUS Detector 729 or OCTAVIUS Detector 1500 - FIELDCHECK phantom
Test object for light field and radiation field checks at linear accelerators. The FIELDCHECK phantom can be used with STARCHECK. - Universal Gantry Mount
LINAC-specific gantry holding device designed to keep PTW ionization chamber arrays secure at isocenter at any gantry position
SPECIFICATIONS
| Detector type | Plane-parallel vented ionization chambers | ||
| Number of detectors |
527 83 measurement points per main axis 109 measurement points per diagonal axis 2 x 53 measurement points for MLC check 40 measurement points for checking the radiation field size | ||
| Detector size | 0.05 cm³ | ||
| Detector spacing | 3.0 mm, 5.0mm for the MLC chambers | ||
| Field size | 26 x 26 cm² | ||
| Scanning range | 25.2 cm along the main axes, 34.5 cm along the diagonal | ||
| Max. measurement points | 2916 (four merged measurements) | ||
| Reproducibility | ≤± 0.5% | ||
| Dead time | zero | ||
| Repetition rate | 200 ms | ||
| Measured quantities |
Absorbed dose to water (Gy), Absorbed dose rate to water (Gy/min) | ||
| Resolution | Dose: 0.1 mGy, Dose rate: 0.1 mGy/min | ||
| Measurement range | 0.05 ... 80 Gy/min | ||
| Reference point | 8.5 mm below the surface of the array | ||
| Dimensions | 42 cm x 30 cm x 2.2 cm | ||
| Weight | 5.5 kg | ||
| Power supply | (100 ... 240) VAC; (50 ... 60) Hz | ||
| PC connection | Ethernet |
| Detector type | Plane-parallel vented ionization chambers | ||
| Number of detectors |
707 141 and 139 measurement points on the main axes 191 measurement points per diagonal axis 48 measurement points for checking the radiation field size | ||
| Detector size | 0.05 cm³ | ||
| Detector spacing | 3.0 mm | ||
| Field size | 40 x 40 cm² | ||
| Scanning range | 40 cm along the main axes, 56.5 cm along the diagonal | ||
| Max. measurement points | 2916 (four merged measurements) | ||
| Reproducibility | ≤± 0.5% | ||
| Dead time | zero | ||
| Repetition rate | 200 ms | ||
| Measured quantities | Absorbed dose to water (Gy),Absorbed dose rate to water (Gy/min) | ||
| Resolution | Dose: 0.1 mGy, Dose rate: 0.1 mGy/min | ||
| Measurement range | 0.05 ... 80 Gy/min | ||
| Reference point | 8.5 mm below the surface of the array | ||
| Dimensions | 74.0 cm x 46.5 cm x 3.0 cm | ||
| Weight | 17.7 kg | ||
| Power supply | (100 ... 240) VAC; (50 ... 60) Hz | ||
| PC connection | Ethernet |
| Detector type | Plane-parallel vented ionization chambers | ||
| Number of detectors |
707 141 and 139 measurement points on the main axes 191 measurement points per diagonal axis 48 measurement points for checking the radiation field size | ||
| Detector size | 0.05 cm³ | ||
| Detector spacing | 3.0 mm | ||
| Field size | 40 x 40 cm² | ||
| Scanning range | 40 cm along the main axes, 56.5 cm along the diagonal | ||
| Max. measurement points | 2916 (four merged measurements) | ||
| Reproducibility | ≤± 0.5% | ||
| Dead time | zero | ||
| Repetition rate | 200 ms | ||
| Measured quantities | Absorbed dose to water (Gy),Absorbed dose rate to water (Gy/min) | ||
| Resolution | Dose: 0.1 mGy, Dose rate: 0.1 mGy/min | ||
| Measurement range | 0.05 ... 80 Gy/min | ||
| Reference point | 8.5 mm below the surface of the array | ||
| Dimensions | 74.0 cm x 46.5 cm x 3.0 cm | ||
| Weight | 17.7 kg | ||
| Power supply | (100 ... 240) VAC; (50 ... 60) Hz | ||
| PC connection | Ethernet |
| Operating system: | Microsoft® Windows®(Windows 7 Professional x32/x64,Windows 8 Professional x32/x64,Windows 10 Pro x32/x64) | ||
| Processor: | multi-core processor, 2.3 GHz or better | ||
| Memory (RAM): | min. 4 GB, 8 GB recommended | ||
| Hard disk: | min. 500 MB of free space for application software and 1.5 GB of free space for .NET Framework 2.0, 3.5 and 4.0+ | ||
| Screen resolution: | 1280 x 1024 or higher | ||
| Interfaces: | Network interface | ||
| Other: | Windows® Internet Explorer® 8.0 or higher, Adobe® Reader® 7.0 or higher |
| Operating system: | Microsoft® Windows®(Windows 7 Professional x32/x64,Windows 8 Professional x32/x64,Windows 10 Pro x32/x64) | ||
| Processor: | multi-core processor, 2.3 GHz or better | ||
| Memory (RAM): | min. 4 GB, 8 GB recommended | ||
| Hard disk: | min. 500 MB of free space for application software and 1.5 GB of free space for .NET Framework 2.0, 3.5 and 4.0+ | ||
| Screen resolution: | 1280 x 1024 or higher | ||
| Interfaces: | Network interface | ||
| Other: | Windows® Internet Explorer® 8.0 or higher, Adobe® Reader® 7.0 or higher |
