Rationing of medical scans has begun due to shortage of medical isotopes

I just saw this Reuters story: US Hospitals Rationing Nuclear Imaging Tests http://www.reuters.com/article/healthNews/idUSTRE55B3NZ20090612

I figure ACC/AdCC (both abbreviations are used to mean Adenoid Cystic Carcinoma) patients are among the most scanned of cancer patients - if you have scans coming up, you may want to check with your doctor to see if an alternative has been selected.
The article says that cancer patients will be moved over to positron emission tomography (PET) scans (PET scans use different isotopes). PET scans are not the best test to see if our particular cancer has moved on, since it is a slow cancer, and tumors can exist that won't 'feed' on the radioactive sugar and thus don't light up in the scan.
Here's hoping that they hurry up and convert that University of Missouri research reactor.