The World Health Organization (WHO) defines Patient Safety as “the absence of preventable harm to a patient during the process of health care and reduction of risk of unnecessary harm associated with health care to an acceptable minimum.”

We believe that independence and integration are equally critical to Patient Safety and Quality Management for today's hospitals, cancer centers and healthcare networks.

Independence provides unbiased assurance issues will be caught while integration with technologies and workflows is how we simplify, standardize and automate processes, for less subjectivity and greater overall efficiency.


Independent QA and Patient Safety

At the the 2019 AAPM Annual Meeting, Sun Nuclear represented independent Quality Assurance companies during the panel discussion Vendor Provided Data, Tools and Test Procedures.

View the presentation given to gain insights from PTW, IBA Dosimetry, Standard Imaging, RIT and Sun Nuclear on the importance of independent QA for keeping radiation oncology safe.

Patient safety cta a

“The QA procedures conducted to assure the quality and accuracy of the product or process (in this case the delivery of radiation therapy) must be independent of the product or process itself. The failure to establish independence can lead to the risk that the QA device merely mimics the performance of the parameter being measured, masking an error or change.”

  • G.S. Ibbott
  • Journal of Physics: Conference Series 250 012001 (2010)


56,000 Fractions. 4,000 Errors.

One large cancer center detected 4,000 errors in the first two years practicing in-vivo monitoring with SunCHECK Patient. Read the case study to learn their best practices from this experience.

Excessive Gantry Wobble

The first Winston-Lutz test conducted on a 2-year-old linac failed AAPM SRS/SBRT standards, and found excessive gantry wobble despite no facility construction or earthquakes. A specialized service team with heavy-duty equipment resolved the issue.1

A patient's spinal cord was overdosed by ~10%. The precise reason why was caught by SunCHECKTM Patient.2

A year of weekly trajectory file measurements on 2 linacs found no errors. Concurrent EPID-based data caught many.3

“It has been clinically observed the log-file derived leaf positions can differ from their actual position by >1 mm.”4


1 J. J. Kapatoes, Vendor Provided Data, Tools and Test Procedures, AAPM 2019
2 Sun Nuclear SunCHECK user internal testing
3 A. Agnew et al., Monitoring daily MLC positional errors using trajectory log files and EPID measurements for IMRT and VMAT Deliveries, Phys. Med. Biol. 59, (2014)
4B. Neal, et al., A clinically observed discrepancy between image-based and log-based MLC positions, Med Phys. 43, 2933 (2016)