ground control...

...to positrons

What a day:
fasting from 6am
finding parking at Charlie's Hospital.....eeeeek (enough to send blood pressure through the roof, so much for being calm)
loading up with a radioactive tracer (the positron bit)
meditating dozing for an hour
lying stretched on the bed and into the PET scanner
tea and sandwiches...yummmm
home

When it is inside, the radiotracer will go to areas inside the body that use the natural chemical. For example, FDG (fluorodeoxyglucose - a radioactive drug) is tagged to glucose to make a radiotracer. The glucose goes into those parts of the body that use glucose for energy. Cancers, for example, use glucose differently from normal tissue - so, FDG can show up cancers.
A PET scan detects the energy emitted by positively-charge particles (positrons). As the radiotracer is broken down inside the patient's body, positrons are made. This energy appears as a 3-dimensional image on a computer monitor.
PET scans can be used to diagnose a health condition, as well as for finding out how an existing condition is developing. PET scans are often used to see how effective an ongoing treatment is. http://www.medicalnewstoday.com

After many months of 'ongoing treatment' looking forward to hearing it has been effective!

(1 of 5 b&w challenge....any takers?)