QA StereoChecker

Filmless CyberKnife® QA System

Easy Method, Better Practice

Designed to be used by both physicists and therapists, this easy method for complete daily CyberKnife QA enables improved frequency and depth of QA practices, potentially improving clinical results.

Filmless and Fast

No film needed. Achieve accurate results within 0.1 mm in less time - hours reduced to minutes - while saving money and potentially increasing patient safety.

QA is done using the clinical pathway rather than the typical QA service mode for more realistic and faster results.

Features & Benefits

Automated Iris™ QA

  • Complete in 5 minutes
  • Scan quality data every morning
  • Measure profiles, field width, penumbra, flatness
  • Capable of detecting a 0.1 mm field size variation

Treatment Localization
(Accuray Quality Assurance™)

  • Complete in 5 minutes
  • Replaces film-based AQA and is faster and easier
  • Measure absolute eccentric and center deviation
  • Capable of detecting a 0.5 mm total translational offset

Picket Fence and
Garden Fence Tests

  • Complete in 5 minutes
  • Replaces daily non-quantitative daily film-based Picket Fence Tests and monthly Garden Fence Tests
  • Measures planned vs. acquired leaf patterns
  • Capable of detecting leaf variations of 0.2 mm


QA StereoChecker
Dimensions 38.7 cm L x 32.7 cm W x 4.9 cm H
Photons 60Co to 15 MV
Total Pixel Number 1024 x 1024
Active Pixel Number 1000 x 1000
Pitch 200 µm
Total area 204.8 x 204.8 mm2
ADC 16 bit, 1 MSps
Dynamic Range > 88 dB
Scintillator Gd2O2S:Tb
Software Specifications
Operating system Windows® 10 Professional
Processor Intel Core (At least dual-core recommended)
Memory 8 GB RAM (16 recommended)
Hard Drive 2 GB Free (20 GB Recommended)
Screen resolution 1024 x 768 or higher
Ports RJ45 (Ethernet)

"We have been very happy with our purchase of the QA StereoChecker. Since acquiring the QASC, CyberKnife daily and monthly MLC and Iris QA at our clinic has been a breeze. The ease of use, coupled with the high resolution, makes me and my therapist’s life so much easier. We currently do a lot of patient specific SRS/SBRT QA with film, and having to be largely filmless with machine QA is big deal. Definitely a worthwhile investment, especially considering the future potential of this device."

Sidney N Tazeh M.Sc., DABR CyberKnife Medical Physicist James A. Haley VA Medical Center

"TOYOTA Memorial Hospital utilizes the just-in-time concept of TPS (TOYOTA production system) which involves efficiently and completely eliminating waste, inconsistencies, and unreasonable requirements on the production line. 

So, for that reason, we purchased QASC in order to eliminate unnecessary time, unnecessary costs like film, and inconsistencies with film analyses.  Moreover, QASC is easy to use. 
Iris QA that actually took more than 4 hours was shortened to about 10 minutes. Measurement and analysis of the flatness test was also easy and our working hours dramatically decreased."

Junji Suzuki, Ph.D. Medical Physicist TOYOTA Memorial Hospital


QA StereoChecker Introduction

0.7 min


Product Resources

Publications, tech notes, testimonials, and other resources to support QA StereoChecker.

Looking for a user manual?

Available on request. Contact your Account Manager


View publications related to this product from experts in the fields of medical physics and oncology.

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Tech Notes

Find detailed instructions on how to setup and execute common processes from our experienced technicians.

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