Abstract
We calculated lacrimal gland dosimetry for the brain imaging agent 99mTc-HMPAO. One hundred thirty-eight patients were studied using a dedicated brain imaging device. Only 11% of the patients showed lacrimal gland uptake. For a 740-MBq (20 mCi) injected dose of 99mTc-HMPAO, the radiation exposure to the lacrimal glands is 10.2 mGy (1.02 rad), or 0.0138 mGy/MBq (0.051 rad/mCi). These values are five times lower than the ones reported by the manufacturer of HMPAO. As the dosimetry calculation is only for subjects showing 99mTc-HMPAO uptake in the lacrimal gland, the average radiation dose to all subjects is considerably lower, 1/10 of the estimated value.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1237-1239 |
| Number of pages | 3 |
| Journal | Journal of Nuclear Medicine |
| Volume | 31 |
| Issue number | 7 |
| State | Published - 1990 |
| Externally published | Yes |
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging