Patient QA Solutions
Machine QA SolutionsSRS MapCHECK® removes film and subjectivity from SRS/SBRT QA, offering streamlined, digital testing for improved Patient Safety. More than 500 users worldwide have adopted SRS MapCHECK for fast, accurate and film-less stereotactic QA workflows. A growing body of publications confirm its unique clinical versatility and efficiency.
SRS MapCHECK supports the prevention of treatment errors for a broad range of stereotactic radiosurgery and radiation therapy delivery systems -- from conventional C-arm linacs to Accuray's CyberKnife® System.
Move Beyond Film
SRS MapCHECK takes the place of film and expedites the workflow for time-sensitive patient QA. It's a consistent, easy-to-maintain method for high-density absolute dose measurements.
Irradiate from Any Angle
With the StereoPHAN, SRS MapCHECK uses a patented technique to account and correct for angular dependence, and pairs that with field size and pulse rate corrections to ensure accurate dose measurements from any angle, including vertex fields.
Flexibility, Speed, Accuracy, as if Verified by Film
Proven to efficiently detect output factor, MLC, and grid size errors, SRS MapCHECK prevents the most common sources of SRS treatment errors.
NEW in SNC Patient v8.5
With the release of SNC Patient software version 8.5, SRS MapCHECK now offers CyberKnife® System Machine QA, making it the only device that supports Machine QA and Patient QA for CyberKnife. New capabilities include MLC QA, Iris Beam QA and Targeting Accuracy QA (TAQA).
Watch this AAPM 2021 presentation for an overview of new features for CyberKnife QA and more >>
"“As our SRS program grew, we quickly realized that film was not going to cut it. The SRS MapCHECK is equivalent to film on a good film day and greatly exceeds it on a bad film day, all while saving significant time. The size of the array is sufficient, and the user-friendly software guides us through setup. We’ve measured up to 20 targets in one plan and confirmed each and every met was calculated accurately.”
Aspirus Regional Cancer Center
Go from 300 Minutes to 10 Minutes
With SRS MapCHECK, the whole process takes just 10 minutes:
- Insert the SRS MapCHECK into the StereoPHAN™.
- Deliver the beam.
- Compare absolute planar dose to the TPS plan.
High Density, Unmatched Diode Detector Resolution
The 2.47 mm detector spacing in SRS MapCHECK provides 5 detectors within a 5 mm field, enabling field size measurements as small as 5 mm — a historical clinical challenge. Combined with an unmatched 0.48 mm detector resolution and patented angular dependence correction, SRS MapCHECK supports robust QA and task group requirements.
Real-Time Results
With SNC Patient™ software, SRS MapCHECK provides immediate, accurate results. No trips back and forth into the room, and no time to wait for film to develop.
Import the QA plan, and SNC Patient compares the dose distribution of the treatment plan file to the actual measured values (absolute and relative dose).
Smaller, High Density Arrays vs. Larger, Lower Density Arrays for Stereotactic QA
Performing patient-specific stereotactic QA on plans with multiple targets and a single isocenter can be complex. Radiation therapy teams rely on arrays to ensure treatments will be delivered as expected. This clinical note explores the importance of detector density in arrays for measuring stereotactic patient QA.
Unmatched Diode Detector Resolution
Detector Spacing and Resolution measures field sizes down to 5 mm (5 diodes in 5 mm cone).
TG-218 Angular Dependence Support
Within SNC Patient™ software, patented, robust angular corrections detect and adjust for translational offset between compared datasets with precision of 0.1 mm. Results are film equivalent, meeting TG-218 requirement for angular dependencies to be accounted for in 2D arrays.
TG-101 Support
To minimize volume averaging errors, TG-101 suggests that SRS measurements should be performed with a detector <1mm. SRS MapCHECK supports this requirement with detectors well under the limit.
Couch Kick Compatible
Optimization-based Calculation Shift algorithm supports co-registering measurements to patient planned dose with 6 degrees of freedom.
Quick, Reproducible Measurements
SRS MapCHECK has no warm-up period and uses its own diodes to determine gantry angle of measurement – no additional electrometer or inclinometer required.
Easy Stereotactic Program Commissioning
For departments adopting SRS/SBRT, SRS MapCHECK is a proven, published, easy method for absolute planar dose measurements. The StereoPHAN enables rotation and measurement across different dose planes.
Start saving time on your SRS QA.
Niigata City General Hospital
Niigata, Japan
Implement a new SBRT program for measuring beam profiles and performing patient-specific QA with accuracy and efficiency.
SRS MapCHECK®
Varian Medical Systems® is a registered trademark, and Varian™, TrueBeam®, Edge®, VitalBeam, Trilogy™, Halcyon™, and Ethos™ are trademarks, of Varian Medical Systems, Inc. Sun Nuclear Corporation is not affiliated with or sponsored by Varian Medical Systems, Inc.
Resources
Publications
- Commissioning of the TrueBeam STx 6 MV FFF Beam in the RayStation Treatment Planning System for SRS and SBRT Treatments
- Dosimetric characterization of a new two-dimensional diode detector array used for stereotactic radiosurgery quality assurance
- Consistency in Response Between Two Copies of a High-Resolution Diode Array for SRS Dosimetry
- Dosimetric consequences arising from beam interruptions with Catalyst – Deep inspiration breath hold
- A first report of tumour-tracking radiotherapy with helical tomotherapy for lung and liver tumours: A double case report.
- Comprehensive evaluation of the high resolution diode array for SRS dosimetry
- Multi-institution validation of a new high spatial resolution diode array for SRS and SBRT plan pretreatment quality assurance
- Characterization and Validation of SRS MapCheck for Patient Specific QA On CyberKnife M6
- Development and Implementation of a Mechanical and Radiation Tests for a Novel Stereotactic Radiosurgery Device Utilizing a 2D Detector Array, to Replace the Film-Based QA
- Evaluation of a High Spatial Resolution Detector Array for SRS Patient Specific QA in Comparison with GafChromic Films and Diamond Detector
- Commissioning and performance testing of the first prototype of AlignRT InBore™, a Halcyon™ AND Ethos™ dedicated surface guided radiation therapy platform
- Commissioning and acceptance guide for the GammaPod
- Dosimetric Evaluation of An SRS MapCHECK for SBRT QA
- Stereotactic QA: saving time, delivering outcomes
- MoreLess
Webinars & Videos
- SRS Commissioning and QA Test Cases: A TG-119 Equivalent for SRS
- Critical Components of a Stereotactic Radiosurgery/Radiotherapy Program (AAPM 2020 Presentation)
- Simplifying Stereotactic Treatment QA
- SRS End-to-End Testing with a High Density Diode Array and Multi-Met WL Phantom
- Film-less Stereotactic End-to-End Testing, Including Non-coplanar Beams
- Multi-Institution Stereotactic QA Results Using SRS MapCHECK™
- Evaluation of a new diode array dedicated to SRS/SBRT commissioning and QA
- Replacing Film with an Electronic Array Designed for Stereotactic Patient Specific QA
- SRS MapCHECK Overview Video
- SRS & StereoPHAN Overview Video
- MoreLess
Specifications
Detector Type |
SunPoint® 2 Diode Detectors |
Detector Quantity |
1,013 |
Detector Spacing (mm) |
2.47 |
Active Detector Area (mm x mm) |
0.48 x 0.48 |
Array Size (mm) |
77 x 77 |
Detector Sensitivity (nC/Gy) |
15 |
Sampling Frequency (ms) |
50 |
Dose Rate Dependence |
+/-1.5% over the range 100MU/min to 2400 MU/min |
Inherent Buildup (g/cm2) |
2.75 |
Inherent Backscatter (g/cm2) |
2.75 |
Radiation Measured |
Photons: 6 MV, 10 MV, 6 FFF,10 FFF |
Number of Connection Cables |
Single power/data cable |
Dimensions (L/W/H) |
320 x 105 x 45 (mm) |
Weight (kg) |
1.9 |
| MoreLess | |
Varian Medical Systems® and Elekta |
Supports C-arm (TrueBeam®, Edge®, VitalBeam, Trilogy™, C-Series, Versa, Synergy, Infinity, Axesse, Compact), Halcyon™, and Ethos™ |
Accuray |
Supports TomoTherapy®, Radixact® and CyberKnife® |
Operating System |
Windows 10 Pro 64-bit |
CPU |
Recommended 2.4 GHz or better, multi-core (2 or more cores) |
RAM |
Recommended 4 GB or more |
Hard Drive Space |
Recommended 5 GB or more |
