Re: Question: follow up TBS

[Guest guest]

Hi Greg,

God question! I think by the time you are scanned post- RAI tx, the 131I

has gone to the thyca and is already concentrated there, doing its' job.

Mine was to determine that I got a large enough dose to get past the neck

mets and to the chest mets. Sometimes a post-scan will show additional

mets that the smaller scan dose didn't catch. I hope this is not the case

for you and that the docs find exactly what they are looking for. I didn't

know anyhting about LID back then. My doctor did wait about nine days

before putting me back on Synthroid.

in OH

=====

Mail to: grammyDx2@...

1965 TT P/F thyca w/lymph mets,

Hypoparathyroidism

1982 RAI for neck & chest mets

09/10/01 Cean scan PTL~!

__________________________________________________

[Guest guest]

Greg,

The scan you will have shows where there is uptake of RAI. Within a day or two

of administering the RAI, most of what was going to be taken up was already

taken up. You excrete most of the rest (the large part of the dose). So, no,

you no longer have to deprive yourself of synthroid or iodine which make the

thyroid like tissues active in taking -up iodine. Synthroid and iodine now

aren't going to change anything since you have already loaded the RAI into the

tissues that will take it up. The wait of ten days lessens the amount of extra

RAI and gives a more accurate picture of what tissues took up the dose of RAI.

Eat and metabolize once more!

gregwinston6352 wrote: I have just completed my

first RAI, and I have a question about the

follow up total body scan (TBS)which will take place next week:

Since I am no longer on the LID, and I am now taking Synthroid, what

does the second TBS measure? If it's purpose is to measure existing

thyroid tissue, shouldn't I be off Synthroid, in hypo, and on LID?

Thanks,

Greg Winston

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