I've presented clear evidence that disproves your claims.
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.
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
Even with a 5-day delay between manufacturing and testing, you can achieve a 500?Gy dose.
FYI - It doesn't take 5 days to ship to India unless you're going to walk it over there.