ML20134B244
| ML20134B244 | |
| Person / Time | |
|---|---|
| Issue date: | 12/17/1992 |
| From: | Donna-Beth Howe NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Watson E OAK RIDGE ASSOCIATED UNIVERSITIES |
| Shared Package | |
| ML20134B246 | List: |
| References | |
| CON-FIN-L-1699, FOIA-96-516 NUDOCS 9301050199 | |
| Download: ML20134B244 (2) | |
Text
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'g, UNITED STATES
'E o NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C, 20555 g E DEC 171992 t /
Evelyn E. Watson, Program Director Radiopharmaceutical Internal Dose Information Center ORISE P. O. Box 117 Oak Ridge, TN 37831-01117
Reference:
FIN Ll699: SHORT-TERM TECHNICAL ASSISTANCE
Dear Ms. Watson:
This letter is a follow-up to our telephone conversation with you September 3, 1992, which authorized ORISE to perform technical assistance in accordance with paragraph 2.3 - Task 3 of the Statement of Work for FIN L1699.
TASK 3, Subtask 7: Calculation of estimated dose to a fetus from a 10 millicurie iodine-131 (1-131) medical diagnostic procedure given to a pregnant woman.
Background:
On February 24,1992, a 46-year-old female patient received a 10 millicurie dose of I-131 for a whole body scan. The patient hhd a previous history of papillary cancer of the thyroid and was treated with surgery and 127 millicuries of I-131 in 1985. The patient had subsequent total body scans in 1987, 1990, and 1992. On May 28, 1992, the hospital performing the total body scan was informed that the patient was pregnant and was probably pregnant at the time of the I-131 administration. In May the patient's OB & Gyn physician estimated the patient was 8 weeks pregnant and an ultrasound scan performed 2 weeks before September 2,1992 was used to estimate the fetal age at 34 weeks.
The performing organization shall:
- 1. Provide organ (if applicable) and whole body doses to the fetus from the I-131 procedure.
- 2. Provide the health and safety significance of the estimated doses, if possible.
Reporting Requirements:
Your September 3, 1992, letter provides the estimated whole body dose and the attached paper by Dr. Robert L. Brent addresses the radiation risk from the estimated dose. No additional reports are needed if you concluded both that the fetal thyroid was not differentiated at the time of the I-131 study and fetal organ doses from I-131 were not significant.
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I i .
Evelyn E. Watson I 1
- Level of Effort
The level of effort to calculate the dose e:timates, analyze the assumptions, j provide health and safety significance, and prepare the written report should !
- not exceed 8 staff hours.
]
Sincerely,
- Donna-Beth Howe, Ph.D.
- Project Manager l Medical and Academic Section Division of InC;strial and Medical Safety
- Office of Nuclear Material Safety
- and Safeguards i
j DISTRIBUTION: i
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