Is a Radioactive Iodine uptake test necessary to rule out thyroid cancer?

A relative of Mine has had thyroiditis and initial testing says she has High T3, T4 but low TSH. She also has a benign Nodule. I told her to wait for the TSH antibody test results and not go for the Radio Iodine Uptake test yet because of it's sideeffects. She could just have Grave's disease which could be diagnosed from the Antibody test!
Am i wrong, since cancer is only found in very rare cases? Are their other Non radio active tests to rule out Thyroid cancer?
She is 32, has no bad habits: non smoker, non drinker, vegetarian. She's had a child!

Yes, absolutely. Iodine -131 responsible for thyroid cancer , if present in the body is to be tested as soon as possible as the half life of this isotope is only eight days. If the patient waits longer, one is sure to die soon. The test uses a body scannen through which the body passes. If his body has I -131 element in the thyroid, the element will emit invisible highly penetrating X-ray like Gamma rays. The source itself is Iodine-131 in the body, which if is confirmed to be present, has to be removed from the body either by surgery or by some consumable medicines which catch, get attached to it & are excreted out of the body as waste. The rays emitted out of the Iodine-131 source in the thyroid penetrate the neck & came out falling on Gamma ray detector which records its signal accurately on electronically controlled automatic machine. It is totally non destructive technique of sensing & confirming the cancer without any harm.
Iodine-131 is there in very small amount everywhere where Iodine is available in soil, water, vegetation & animal meats. Normal Iodine other than I -131 is not harmful at all. Only I-131 is cancerous which is there in nature by less than even 0,1 % of normal Iodine. it is human metabolism variation or some zone where water etc are very bad that it enters the body & remain entrapped in big amount causing cancer which is only an accident but that too is curable completely in initial stages. I tell you use herb 'Chapparel' & sleep comfortably & harmlessly.

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