Patient QA SolutionsArcCHECK® is the only detector array specifically designed to identify errors in rotational delivery. It's the ideal solution for: 4D Patient Pre-Treatment QA for IMRT, VMAT, SBRT and MRgRT; including specialty systems such as Varian Medical Systems® Halcyon™ System and Ethos™ Therapy; and Accuray TomoTherapy® and Radixact™ Systems.
Powerful Patient-Specific QA
ArcCHECK is recommended by AAPM Task Group 218 for 3D measurement requirements. It measures and correlates gantry angle, leaf-end position, absolute dose and time to identify any potential source of error throughout the patient volume.
Clinically Relevant Dose & DVH QA
Identify TPS and beam delivery errors. With a single click, compare measured dose points to planned dose points. Review individual control points and user-defined full or sub-arc sections for an in-depth overview of pass, low, and high dose results.
MLC Pattern Machine QA
Further leverage your ArcCHECK for Machine QA tests by evaluating discrepancies between the planned and delivered MLC pattern and identifying leaves that may require service.
The Gold Standard
ArcCHECK provides true data on plan delivery and insights into potential errors. It owes its widespread adoption to:
- A helical detector grid with 1,386 SunPoint® Diode Detectors for increased Beam's Eye View (BEV) data density
- Angular corrections accurate to ±0.5° using the Virtual Inclinometer™
- Consistent BEV for all gantry angles measuring entrance and exit dose at multiple depths, and indicating potential delivery and TPS modeling errors for high or low dose levels
- Real-time electrometer that measures every pulse, as well as composite and sub-arcs
Flexible Interior Dose Measurements for More Stringent QA
- Tissue equivalent inserts support heterogeneity tests:
- Inserts include: Brain, Breast, Bone, Liver, Lung, Muscle, Adipose, Titanium and Water/Air
- MultiPlug™ accepts ion chambers, stereotactic detectors and film for interior point measurement in any of 25 unique locations
- CavityPlug™ insert offers simplified isocenter dose measurement, without the film and tissue-equivalent insert features of MultiPlug
SunCHECK® Integration
With direct connectivity from ArcCHECK to the SunCHECK Platform:
- Leverage array-based and advanced phantomless 3D pre-treatment QA with a single platform, for added clinical confidence
- Capture and store results, including absolute dose calibration, array calibration data, and measurements for composite results and per beam deliveries
ArcCHECK directly connects to SunCHECK for improved root-cause analysis.
SNC Patient software compares measured ArcCHECK dose points to planned dose points. Compare normalized data or absolute dose data using Distance to Agreement (DTA), Gamma, and Gradient Compensation.
Individual control points and user-defined arc sections can be analyzed for a full arc or sub arc. A 360° presentation of pass, low, and high dose summary for the defined control point range and sub arcs is presented.
3DVH® Software allows fully independent, full density 3D QA to support beam model adjustments. A small time investment in configuring up-front, saves valuable time in the long-term.
Acquire a comprehensive understanding of treatment delivery by leveraging ArcCHECK's consistent BEV for all gantry angles, densely populated detector grid, virtual inclinometer, and multi-arc control point analysis.
Helical Detector Grid
Helical grid detector arrangement increases the sampling rate and reduces BEV detector overlap and shadowing.
Virtual Inclinometer™
The Virtual Inclinometer calculates gantry angle with an accuracy of ±1° by using entrance and exit dose – no additional cables needed, as with other vendors.
Machine QA Analysis
Additional supported Machine QA tests include dynamic gantry rotation, angle, and speed; symmetry and flatness; MLC QA; and treatment reproducibility QA.
Large and Small Fields
Combine two measurements in SNC Patient software for larger field sizes (up to 36 cm x 21 cm), or use the merge feature to measure to double the density of a measurement, providing 5 mm resolution.
Easy Setup and Transport
Built-in rotation and tilt inclinometers offer a sophisticated yet easy-to-use leveling system. Power Data Interface (PDI) is managed through Sun Nuclear's single-cable architecture.
MR Compatibility
An MR-compatible version is available for departments practicing MRgRT.
When 2D Measurement Isn’t Enough
AAPM Task Group-218 recommends 3D measurements that can find errors anywhere in the patient volume and recommends against 2D Perpendicular Composite measurements that don’t sample the entire volume — and may mask clinically impactful errors. ArcCHECK meets these requirements for error detection.
Resources
Publications
- A comparison of the gamma index analysis in various commercial IMRT/VMAT QA systems
- Optimizing the accuracy of a helical diode array dosimeter: A comprehensive calibration methodology coupled with a novel virtual inclinometer
- Robotic radiosurgery system patient-specific QA for extracranial treatments using the planar ion chamber array and the cylindrical diode array
- Commissioning Monte Carlo algorithm for robotic radiosurgery using cylindrical 3D-array with variable density inserts
- Automated Planning and Delivery of Hippocampal Avoidance Whole-Brain Radiotherapy for Brain Metastases Using HyperArc Technology
- Filmless methods for quality assurance of Tomotherapy using ArcCHECK
- EP-1533: Sensitivity of ArcCheck system to setup error using Perfect Pitch 6D couch
- Commissioning and performance testing of the first prototype of AlignRT InBore™, a Halcyon™ AND Ethos™ dedicated surface guided radiation therapy platform
- Clinical Evaluation of Lung SBRT for the Halcyon Platform and Dosimetric Comparison with the Truebeam STx and Millennium MLC Systems
- Optimized Volumetric Modulated Arc Therapy (VMAT) Technique for Left Sided Breast Cancer Comprehensive Radiation Therapy Via the Halcyon Delivery System
- Plan Quality and Delivery Efficiency Comparison Between Halcyon 2.0 and Tomotherapy Hi-Art
- Plan Quality Comparison for Cervical Carcinoma Treated with Halcyon and Trilogy Intensity Modulated Radiotherapy
- Experience in commissioning The Halcyon linac
- VMAT QA: Measurement-guided 4D dose reconstruction on a patient
- Moving from gamma passing rates to patient DVH-based QA metrics in pretreatment dose QA
- Evaluating IMRT and VMAT dose accuracy: practical examples of failure to detect systematic errors when applying a commonly used metric and action levels
- Tolerance limits and methodologies for IMRT measurement-based verification QA: Recommendations of AAPM Task Group No. 218
- A pre-treatment quality assurance survey on patients treated with the new Accuray Radixact platform
- Clinical implementation of RayStation for Accuray Radixact tomotherapy platform
- Using a Novel Dose QA Tool to Quantify the Impact of Systematic Errors Otherwise Undetected by Conventional QA Methods: Clinical Head and Neck Case Studies
- Per-beam, planar IMRT QA passing rates do not predict clinically relevant patient dose errors
- MoreLess
Clinical / Technical Notes
Webinars & Videos
Specifications
Detector Type |
SunPoint® Diode Detectors |
Detector Quantity |
1,386 |
Detector Spacing (cm) |
1.0, 0.7 cm Beams Eye View, 0.5 cm with Merge feature |
Array Diameter (cm) |
21.0 |
Array Diameter (cm) |
21.0 |
Water Equivalent Inherent Buildup (g/cm2) |
3.3 |
Detector Physical Depth (cm) |
2.9 |
Array Geometry |
Helical Grid (HeliGrid) 1 cm offset |
Phantom Material |
PMMA (Acrylic) |
Active Detector Area (mm2) |
0.64 |
Detector Sensitivity (nC/Gy) |
32.0 |
Max Dose/Pulse (Gy) |
0.003 |
Detector Stability |
0.5% / kGy at 6 MV |
Dose Rate Dependence |
± 1% |
Update Frequency (ms) |
50 |
Number of Connection Cables |
Single power/data cable |
Dimensions (cm2) |
27.0 x 43.0 |
Weight (kg) |
15.4 |
Transport Option |
18-inch wide trolley, designed to slide away after positioning on couch; not MR-compatible |
| MoreLess | |
Operating System |
Windows 10 Pro 64-bit |
CPU |
Recommended 2.4 GHz or better, multi‑core (2 or more cores) |
RAM |
Recommended 8 GB or more |
Hard Drive Space |
Recommended 5 GB or more |
FFF |
Yes |
MR |
Yes (ArcCHECK-MR®) |
Varian and Elekta C-arm linacs, Varian Medical Systems® Halcyon™ System , Ethos™ Therapy and Accuray's TomoTherapy® and Radixact™ Systems |
Yes |
SunCHECK |
Direct device connectivity within SunCHECK Patient |
Varian Medical Systems® is a registered trademark, and Varian™, Halcyon™, and Ethos™ are trademarks, of Varian Medical Systems, Inc. Sun Nuclear is not affiliated with or sponsored by Varian Medical Systems, Inc.
