The Therac-25 Radiation Therapy Machine Failures: A Software Engineering Catastrophe
By
lemper
Crisp on the outside, thoughtful on the inside. A keeper.
Summary
The article discusses the Therac-25 incident, a catastrophic failure in medical device software engineering that resulted in multiple patient deaths and injuries due to radiation overdoses. The Therac-25 was a radiation therapy machine that delivered lethal doses of radiation to patients because of software bugs, race conditions, and poor engineering practices. The incident serves as a critical case study in software safety, highlighting the importance of proper testing, documentation, and safety protocols in mission-critical systems.
Key quotes
· 4 pulledWhen you're strapping a patient to an electron gun capable of delivering a 25MeV particle beam, following procedure is vitally important.
I think it's important that everyone in our industry know about this incident, and upon digging into the details I was stunned by how much of a WTF there was.
Today's article is not fun, or funny. It describes incidents of death and maiming caused by faulty software engineering processes.
The technician operating the Therac-25 radiotherapy machine at the East Texas Cancer Center (ETCC) had been running this machine, and those like it, long enough that she had the routine down.
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