The Therac 25 Incident | Marks Unexplained World (Ep. 87)

The Therac 25 Incident | Marks Unexplained World (Ep. 87)

The Therac-25 was a computer-controlled radiation therapy machine produced by Atomic Energy of Canada Limited (AECL) in 1982 after the Therac-6 and Therac-20 units.

It was involved in at least six accidents between 1985 and 1987, in which patients were given massive overdoses of radiation.

Because of concurrent programming errors (also known as race conditions), it sometimes gave its patients radiation doses that were hundreds of times greater than normal, resulting in death or serious injury.

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