Instead of addressing it with a reasoned response, you've defaulted to a simplistic reply lacking any supporting evidence.
You're out of your depth and it shows. Come back when you're ready to discuss it like an adult.
IsoPet (aka Radiogel) is typically administered in the range of about 200 Gy up to a maximum of 400Gy. I'll give you the benefit of doubt and go with a 500 Gy safety test.
IsoPet (aka Radiogel) is available at activities ranging from less than <1 mCi to about 30 mCi (approximately 37 to 1110 MBq).
Safety Test - 30-gram tumor(a typical mass for thyroid cancer
Manufactured Activity: A single vial at 30 mCi (30,000µCi)
Dosimetry Conversion: ~54? Ci of Y-90 delivers 100 Gy to 1g, i.e. about 1.85 Gy per µCi per gram