The Digital SRS/SBRT Patient QA Solution
Fully utilize the capabilities of your stereotactic machine with the tool that enables more precise QA delivered in less time. The new myQA SRS solution uniquely combines:
- unrivaled accuracy and resolution of film QA,
- with the proven efficiency of digital detector array workflow.
Highlights:
- Fully compliant with TG 218
- QA in native plan geometry including couch kick/non-coplanar beams
Treat more SRS/SBRT patients safely and with the confidence it’s done right.
Read how myQA® SRS maximizes accuracy and efficiency for your SIMT radiosurgery plans.
Read about the time-saving benefit for your SRS/SBRT QA
Compare myQA SRS, a large area array without discrete detector spacing, vs. smaller arrays with low detector density.
Experience with myQA SRS in the USA
“Patient-specific SRS and SBRT QA results look great using the myQA SRS even for very tight parameters of 2mm/2%. The digital detector QA workflow with myQA SRS is 106 times faster and easier compared to using film. The film-equivalent resolution for our QA measurements is the basis for better and more meaningful SRS patient plan verification with a high sensitivity and specificity to detect real dosimetric issues.”
Yun Yang PhD, DABR
Department of Radiation Oncology
Rhode Island Hospital, USA
Experience with myQA SRS in the UK
“The high resolution of myQA SRS detector gives us high confidence in our stereotactic treatments, including SBRT spine, prostates and liver. We have achieved excellent Gamma Analysis QA results at 2 % and 2mm. The detector matched the performance of our ionisation chambers and compared excellently to film. The detector, phantom and software package is easy to use and integrates seamlessly into our myQA Platform. Obtaining instant high-resolution results without the need for lengthy film measurements is a big advantage.”
Sally Fletcher, Head of Radiotherapy Physics
Bristol Haematology and Oncology Centre
University Hospitals Bristol and Weston NHS Foundation, UK
Read the myQA SRS user validation article
Clinical validation and application in SRS/SBRT Patient QA
For further insights about dose constraints, download our free poster.
Film Class detector array optimal for SRS/SBRT
- Unique solid-state sensor array.
- 105,000 pixels total.
- 0.4 mm resolution.
- Zero pixel spacing, no missing data
Light field check
- Field size markers 5x5 and 10x10 cm².
- Easy verification of the light field’s conformity with the radiation field.
Laser setup marker
- Precise and fast setup through laser alignment.
Designed for non-coplanar fields
- Compact design enables QA of flexible SRS beam rotation angles.
Gantry Sensor+
- QA accuracy for rotational cases.
- Accurate measurements of your Linac rotation angles corresponding to your detector measurement.
- Automated gantry angle correction.
- Easy setup without cables with wireless data exchange.
Largest high-resolution stereotactic detector field
- 12 x 14 cm² active array.
- Efficient QA of multiple stereotactic targets in one measurement setup.
The myQA SRS Phantom
- For verification of single beams and for composite SRS plans using the myQA SRS detector.
myQA Patients Software - Workflow efficiency for SRS measurements and analysis
- Smart software reduces typical SRS validation times:
- Automatic alignment of the dose distributions.
- Field by field measurements for precise SRS technique verification.
- Automated beam-triggered measurement mode: save multiple mouse clicks and get QA results within seconds.
When Accuracy matters, Resolution matters!
myQA SRS provides the clinical resolution needed for the most advanced QA:
- Measurement-based Patient QA is strongly encouraged e.g. by AAPM-RSS Medical Physics Practice Guideline 9.a. for SRS/SBRT.
- However, publications have shown that “detector resolution is of main importance to avoid getting false positive [QA results].” A. Bruschi et al.: Detector resolution affects the clinical significance of SBRT QA. Find link to Publication here.
- Other commercially available detector arrays for SRS/SBRT do not provide sufficient measurement resolution.
- myQA SRS is the new and unique solution providing film-class resolution clinically needed to avoid false QA results.
- Automated gantry angle correction with the wireless Gantry Sensor+.
Save hours of QA time vs. typical film dosimetry.
The complete SRS / SBRT QA Solution
The myQA SRS Phantom
- For verification of single beams and for composite SRS plans using the myQA SRS detector.
- Cylindrical shape with cap for non-coplanar arc delivery.
- Easy setup on the couch through lightweight design and laser alignment markers.
- Including dedicated inserts for small field dosimetry chambers.
- Optional film insert for benchmarking and for your seamless transition from film-based QA to myQA SRS QA.
Questions about myQA SRS?
If you are curious about details and facts, we are happy to provide them.
Highlights:
- Fully compliant with TG 218
- QA in native plan geometry including couch kick/non-coplanar beams
- Angular dependence accurately accounted for
You can find more here:
Frequently asked questions
- What is the advantage of solid-state detector technology?
myQA SRS uses a unique sensor technology based on CMOS technology (complementary metal-oxide-semiconductor) which allows a compact design, fast read out, and high pixel density on both dimensions. As described in Jimenez-Spang. F et al “Photon small-field measurements with a CMOS active pixel sensor” (Physics in Medicine and Biology , May 2015) , each pixel is a light radiation sensitive element with a photodiode, a capacitor and three transistors. After ionizing radiation interact in the pixel sensitive volume, the generated electrons are collected by the diodes implanted into the pixel volume and the collected charge is integrated by the action of a capacitor in each pixel.
- What are the challenge of using other “SRS detector array” solutions for stereotactic QA?
Only myQA SRS offers Film-Class-Resolution in a digital detector solution. All other detector rely on either diodes or ionization chambers. Whilst especially ionization chambers have a proven and reliable track record for conventional Radiation Therapy QA like IMRT or VMAT, they don’t allow for sufficient measurement resolution needed for the extreme dose gradients seen in SRS cases. Standard detectors face technical limitations in terms of possible resolution and have a significant percentage of area between the actual pixels where no data can be measured. To compensate the lack of measured data, dose interpolation is typically applied “fill the data gaps”. Whilst this is acceptable for conventional treatments, low measurement resolution and interpolations is a main factor for getting false positive QA results. What are the challenge of using other “SRS detector array” solutions for stereotactic QA?
Only myQA SRS offers Film-Class-Resolution in a digital detector solution. All other detector rely on either diodes or ionization chambers. Whilst especially ionization chambers have a proven and reliable track record for conventional Radiation Therapy QA like IMRT or VMAT, they don’t allow for sufficient measurement resolution needed for the extreme dose gradients seen in SRS cases. Standard detectors face technical limitations in terms of possible resolution and have a significant percentage of area between the actual pixels where no data can be measured. To compensate the lack of measured data, dose interpolation is typically applied “fill the data gaps”. Whilst this is acceptable for conventional treatments, low measurement resolution and interpolations is a main factor for getting false positive QA results.How does myQA SRS support multiple target QA?
Yes, myQA SRS provides the largest active detector filed of any existing dedicated stereotactic detector array. The large 120x140 mm² active array easily enables multiple targets to be measured in a single setup. The myQA Patients software enables you to validate all targets simultaneously.Are rotational treatments and co-planar fields supported by myQA SRS?
Yes, the compact design of the myQA SRS detector and SRS Phantom with its cylindrical shape and rounded cap provide the needed clearance for QA measurements of all typical SRS beams and arcs. The system also supports in-line and perpendicular setup in the Varian® Ethos™ and Halcyon™. The Ganry Sensor + Accurate measurements of your Linac rotation angles corresponding to your detector measurement.What SRS and SBRT systems are supported:
myQA SRS Supports all SRS and SBRT systems 1)- All standard and stereotactic C-arm Linacs.
- Retrofitted MLC or cone-based SRS systems.
- Varian® Ethos™ / Halcyon™ (including perpendicular setup in the bore).
- CyberKnife® MLC, Iris or Cones.
- TomoTherpy® / Radixact®
- BrainLAB Novalis®.
myQA SRS - The power of SRS revealed!
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