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-----Oorspronkelijk bericht----- Van: <Audrey Cashwell> <[log in to unmask]> Aan: [log in to unmask] <[log in to unmask]> Datum: zaterdag 20 mei 2000 23:10 Onderwerp: DR.,and Parkinson's Audrey wrote: >> This is nothing like an MRI. AB-CIT-SPECT SCAN -is a radioactively drug injected into your vein and binds to the dopamine neurons in your brain ,and this happens for about 2 days till they do the scan. << Hi Audrey, From your post I understand that it is not sure yet you have PD, but you do have Parkinsonian symptoms. PD can not be diagnosed by ANY test or scan yet, so the neuro has to do that mainly based upon the symptoms you have. And if you don't clearly have the "standard" symptoms of PD, the neuro will not be able to make a clear diagnose. There are however a few means to narrow it down and make the suspected PD-diagnose a bit more reliable. - the neuro gives you levodopa. If your symptoms respond positively, that makes it more probable you have PD. - you can have a SPECT scan. The binding %% of the radioactive agent with the dopamine neurons also gives the neuro an extra indication in the dilemma "PD, or NOT PD". There are several types of these "radioactive" SPECT scans. The difference is in the diagnostic purpose they are used for and therefor the used radioactive stuff differs. Some radioactive material has a short time before it becomes inactive, some a longer period. Therefor in some cases a SPECT can be done shortly (2 hrs) after the injection, in other cases - like yours - two days later. Although all these scans use radioactive material, all this material is administered in such a low concentration, that it is very unlikely to have any negative result on your health, eventhough two days may seem long to you. And as an extra precaution during that time you get other meds, to make sure the radioactive material binds ONLY to the dopamine neurons in the brain and NOT to other organs like the thyroid gland. After the scan it only takes a short period before ALL the radioactive material has been excreted from your body by the kidneys. Hans.