myQA SRS for CyberKnife®
Film-class digital resolution and efficiency for CyberKnife® QA
Compatible with Machine/Modality/Application:
Small Field Dosimetry,
TG135
Used for Workflow
Beam Profile Analysis for CyberKnife®,
Delivery and Plan Verification (RT)
myQA SRS for CyberKnife® provides all tools CyberKnife® users need for accurate and fast patient specific pretreatment QA and linac beam analysis.
With 0.4 mm film-class resolution and a 12 × 14 cm2 sensor area, myQA SRS for CyberKnife® combines the accuracy and resolution of Film QA with the proven efficiency of a digital detector array. Patient Specific QA workflow supports measurements and analysis in the native plan geometry to fully match patient treatment delivery.
- CyberKnife® specific fiducials support easy positioning of the myQA SRS System
- Film-class digital resolution and efficiency
- Automatic SAD and Angular correction
- Seamless QA of millimetric target sizes with multiple measurement points
- Evaluation of multiple targets at once
- Fast digital detector array readout speed
Discover software highlights interactively
TPS calculated dose distribution with 2 mm resolution
Detailed profile analysis with numerous measurement points
myQA SRS measured dose distribution with 0.4 mm resolution
Detailed Gamma index analysis - 3% / 1mm, 99.9% passing rate
1 TPS calculated dose distribution with 2 mm resolution
2 Detailed profile analysis with numerous measurement points
3 myQA SRS measured dose distribution with 0.4 mm resolution
4 Detailed Gamma index analysis - 3% / 1mm, 99.9% passing rate
Experience with myQA SRS for CyberKnife®
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"With the increasing adaptation of multiple-mets SRS, sometimes with different dose requirements due to target sizes, and the trend of treating smaller and smaller mets, patient-specific QA to ensure the accuracy of targeting and dose delivery has become even more important.
At Stanford, we use film for small target (~ 5 mm) patient-specific QA on the CyberKnife® system since it has the highest resolution of all our QA equipment. We do not want to have only 5 measurement points on a diode array for the QA. However, there is at least a few hours wait time for film analysis and it requires careful handling to obtain accuracy within 3%. We are testing myQA SRS for the purpose of possibly replacing film. We think its immediate readout and high resolution of the CMOS detectors will be the ideal equipment for small-size SRS treatment QA. The development of being able to rotate the detector plane to best capture multiple mets at the same time is also very exciting and promising to streamline the QA workflow.
In addition, we are actively looking to treat functional cases such as OCD and tremor on the CyberKnife® system in the future. The doses for such cases are extremely high; for example, the central dose for tremor is 140 Gy, and the target sizes in these cases are even smaller, so the consequence of inaccurate delivery is even more severe. Based on our current testing and the improved workflow on myQA SRS, we think myQA SRS's high resolution will provide us with confidence of the treatment delivery accuracy for these cases."
Cynthia Chuang, PhD, DABR, Clinical Associate Professor Department of Radiation Oncology, Stanford University, Stanford, California
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“With angular and SAD corrections applied, the myQA SRS array provided very good results and high agreement with the TPS data and is well-suited for pretreatment verification of CyberKnife® SRS plans.”
Dr. Kim Holm, Medical Physicist, Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg, Germany
Find more resources here
Brochures
Scientific References
Articles
myQA SRS for CyberKnife®
Multi-Institutional Dosimetric Commissioning of High-Resolution CMOS 2D Detector for PSQA of VMAT SIMT Stereotactic Radiosurgery
High-resolution CMOS detector array for robotic SRS treatment plan verification
Sensitivity of myQA SRS detector to intentional errors in HyperArc plans.
Validation of a high resolution solid-state detector array for SBRT/SRS patient specific QA
Patient Specific Quality Assurance
Detector specific output correction factors in small fields for 2D detector arrays
Evaluation of a novel-integrated quality assurance phantom for Winston-Lutz test
Benefit of large area array without discrete detector spacing for SRS/SBRT QA vs. smaller arrays with low detector density
myQA SRS workflow video
Clinical webinars
Analysis of independent dose calculation and measurement systems for patient specific quality assurance
Independent Dose Calculation and Measurement in PSQA – What We Learned
Patient-specific quality assurance remains a critical step to ensure treatment accuracy and safety. In this webinar, Emma Dyke is sharing findings from a detailed comparison of two independent dose calculation systems and two measurement systems used in clinical practice.
Bristol Haematology and Oncology Centre
Stereotactic clinical experience with myQA SRS on pre-treatment verification of multi-target brain plans
Guest speaker Dr. Guoqiang Cui, a medical physicist from Duke University Medical Center, shares his stereotactic clinical experience with myQA SRS in the USA.
Assistant Professor of Radiation Oncology, Duke University Medical Center
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