THYROID AGENTS
...중략...
Tc-99m Pertechnetate - 5-10mCi dose, 100-300mrad/mCi (lowest dose)
Assessment of trapping fxn, Maximum uptake at 20min (.5-3.7%)
NO organification, completely discharged by K+ perchlorate
Target to background less favorable than iodine
Better photon flux - detectablility of nodule <8mm improved
Image w 5mm pinhole for mag, organ takes up 2/3 of view
200-500,000 counts acquired 5min P dose, include markers
Results in <2hrs, good if pt unable to take PO meds
Also good if Pt has had Iodine dose, ie contrast
Discordant Nodule - 2% of Tc-99 hot nodules will be cold w iodine
nodule cannot be considered functioning until confirmed w Iodine
20분에 최대 uptake고 0.5~3.7%가 정상이라는 말 같은데...
잘 모르겠습니당 ㅎㅎ^^;
THYROID AGENTS
...중략...
Tc-99m Pertechnetate - 5-10mCi dose, 100-300mrad/mCi (lowest dose)
Assessment of trapping fxn, Maximum uptake at 20min (.5-3.7%)
NO organification, completely discharged by K+ perchlorate
Target to background less favorable than iodine
Better photon flux - detectablility of nodule <8mm improved
Image w 5mm pinhole for mag, organ takes up 2/3 of view
200-500,000 counts acquired 5min P dose, include markers
Results in <2hrs, good if pt unable to take PO meds
Also good if Pt has had Iodine dose, ie contrast
Discordant Nodule - 2% of Tc-99 hot nodules will be cold w iodine
nodule cannot be considered functioning until confirmed w Iodine
20분에 최대 uptake고 0.5~3.7%가 정상이라는 말 같은데...
잘 모르겠습니당 ㅎㅎ^^;