Dozens of patients injured by stray radiation beam

http://www.msnbc.msn.com/id/40839907/ns/health-the_new_york_times/

by edw519 • 16 years ago

15 20 16 years ago

msnbc.msn.com

gnosis• 16 years ago

Original article:

http://www.nytimes.com/2010/12/29/health/29radiation.html?_r...

ars2• 16 years ago

It's the same text BTW.

noonespecial• 16 years ago

I've seen these devices in action. There is zero visual feedback when they are operating. Would it be so hard just to have a variable brightness indicator light coupled with a radiation detector so the operator or assistant would say "damn, is it always that bright?"

Something, anything that would give the operator some kind of visceral feedback consistent with the output.

ars2• 16 years ago

It mentioned that there is a light field that is supposed to show where the radiation will hit, but the mount blocked it - but didn't block the radiation.

byteclub• 16 years ago

"To work around that problem hospitals needed to, as one medical physicist put it, essentially trick the machine into thinking it was using a different attachment, which it did recognize. To do that, users had to enter additional data into the SRS system."

Scary.

nopassrecover• 16 years ago

Very. Presumably they're paying for hefty support contracts as part of the purchase of these machines - I cannot imagine that the developers recommended medical end-users alter the system. If so they seem culpable.

OstiaAntica3• 16 years ago

Meanwhile, untrained TSA employees are rolling out hundreds of new radiation scanners at airports. The technology is different but TSA malfunctions are simply a matter of time...

dannyb• 16 years ago

While I agree with the general thrust of your comment, the machines used by the TSA are not "focused" in the same way. It would take much greater effort to create hazardous conditions like these patients experienced.

OstiaAntica3• 16 years ago

TSA scanners are focused more than a traditional x-ray, because they target skin tissue to produce the image.

tgvcfgtbvcfgh• 16 years ago

The TSA systems (at least the backscatter X-ray) do use a focussed moving beam to build up an image. They rely on the continual movement of the beam to limit the dose.

There are a number of safety systems to prevent the machine leaving the beam on should the mechanism stick.

And of course they are operated by the finest trained experts with a comprehensive background in nuclear physics and the ability to react in the fraction of a second before a notifiable dose was delivered

teej• 16 years ago

I love to hate on TSA as much as the next guy, but the "technology difference" to this medical device is the difference between a nerf gun and a sniper rifle.

OstiaAntica3• 16 years ago

The point is that medical professionals can't properly handle a sniper rifle, do you trust TSA employees with any level of radiation deployed on a massively larger scale?

icegreentea• 16 years ago

Echos of Therac-25. Not nearly as bad... no one's dead yet.

gry• 16 years ago

Oh, oh! I tried to find a book I have with the Therace-25 case study. If I recall, race conditions tripped the integer byte datatype and fired radiation at that point in time.

Ten years later, I've meant to finish the book. It's in a box somewhere.

tedunangst• 16 years ago

This guy is dead.

http://www.nytimes.com/2010/01/24/health/24radiation.html

Actually, if you look at the author's work, he's been covering radiation overdose all year.

http://topics.nytimes.com/top/reference/timestopics/people/b...

milhous• 16 years ago

I'll trust UCSF over TSA's bullshit any day of the week.

http://news.ucsf.edu/news-briefs/details/ucsf-scientists-spe...

nitrogen• 16 years ago

I hope that the families of the unfortunate victims of these overdoses allow the affected tissues to be studied (with appropriate compensation), so that treatments can be devised if similar injuries occur in the future, and general medical knowledge increases.

notaddicted• 16 years ago

I'm guessing submitter discovered this in The Risks Digest. I subscribed by RSS recently and I am finding it interesting. There is a healthy culture of informed paranoia in plenty of other disciplines aside from software that one can learn from.

http://catless.ncl.ac.uk/risks

A hilarious article about f16 testing is what turned me on to it in the first place: http://catless.ncl.ac.uk/Risks/3.44.html#subj1

vsync• 16 years ago

> The mistakes in Evanston involve linear accelerators — commonly used for standard radiation therapy — that were redesigned by the manufacturer, Varian Medical Systems, so they could also perform SRS. As the devices became more versatile and complex, problems arose when vital electronic components could not communicate with one another.

WTF, this is eerily and specifically reminiscent of Therac-25. Did they learn nothing?

Dozens of patients injured by stray radiation beam

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