Tuesday, February 7, 2012

Why Heather, aren't you radiant today?

I've been wanting to do this after several PET scans now, but I was uncertain if I should put it on the blog or not since it requires a tool that I don't have at home.  I suppose now that you know what I decided, the only remaining question is, regarding what?

As I have explained previously, the purpose of a PET scan is to detect regions of increased metabolic activity in the body.  Increased activity is potentially indicative of cancer.  This activity is detected by injecting a hungry person with radioactive glucose (sugar).  The person then rests for an hour, and since the person hasn't eaten in awhile the sugar goes straight to the hungriest cells (cancer, if present).  The radioactivity concentrates there, and when the person is scanned after the hour of resting this concentrated radioactivity (if present) is mapped.

What I don't think I've discussed previously is, what happens to the radioactivity after the scan?  Well, it decays and goes away.  The type of radioactivity used in a PET scan has a very, very short half life, so short in fact that the clinic receives a shipment of radioactivity for the morning patients and a separate shipment for the afternoon patients.  Said another way, a shipment received in the morning is no longer radioactive enough to be used in the afternoon patients.

But there are several hours between "morning" and "afternoon".  Needless to say, I was curious about how radioactive (hot) I'd be just after a PET scan.

Lucky for me, we have a Geiger counter at my place of work.  A Geiger counter is a little box the size of a car battery with a microphone-like wand attached to it by a cord.  When turned on it works much like a metal detector, making rapid beeps when it detects radiation nearby and only occasional beeps in its absence.  My friend Sam was all too eager to use the Geiger counter on me, approximately 2.5 hours after the radioactivity was injected in my arm for the PET scan.  Fortunately Torey had his camera.  (Don't mind my ridiculous walking posture.  Apparently I don't walk normally when I know there's a camera on me.)  



Radiant indeed!  I suppose that for as much as I hate PET scans, they provide a nerd's delight.  Some amazing technologies are intertwined to make cancer detection happen, radioactivity and all.  Nerd salute to physics!   

14 comments:

  1. I love it! You should do another video of you walking by after it has chilled out a bit.

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    1. A negative control! Brilliant! I suppose you could consider Sam to be the negative control here--if an everyday human were to beep-up the Geiger counter, it would be loud because of his proximity.

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  2. Honors floor salute!

    A) I am so jealous that you have a geiger counter at your work.

    B) This was an awesome demonstration!

    C) You are radiant! In more ways that one.

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  3. Ok, that gave me a huge giggle. And damn girl, I have to say... you are *so* HOT! lol!!! But I think Radiant is a much better way to think of it ;-)

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  4. Heather, I love your play on words. You are radiant, and you are cuter than cute in this video. Enjoy each and every minute of your vacation. I'll be thinking of you and your family as you watch Azalea and Eleanor enjoy their fist plan ride. What a joy that this happened for you.

    Love, Aunt Andrea

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  5. Can you send me a copy of that video? I'm hosting a video party next week (Most Epic Film Fest 2012) and would like to submit it on your behalf.

    I haven't had a good Geiger Counter laugh in years, so thanks for the entertainment.

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    1. The movie file is too big to email. Let's chat about other options.

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  6. The walk (the Neutron Strut?) is the best part.

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  7. With the addition of one comma, you can use the same blog post title for your negative control video: Why, Heather, aren't you radiant today?

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    1. OMG I LOVE grammar jokes! Well played, MlMw, well played.

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  8. In the lab I worked in before grad school I did some radiation stuff. The lab manager came by one day and ran the geiger counter over my bench, mad beeping ensued. I was like "!!!#?". But *he* was radioactive from a thyroid scan of some sort.

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    1. You poor thing! I would have been soooo mad. I don't like being messed with at the bench.

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