Radioguided Surgery of Breast Cancer: Radiation Protection Survey
| Autor: | Gian Luca Cartia, Alessandro Turra, Antonella Ostan, Sergio Ramella, Cinzia Motta, Bruno Farina |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Cancer Research
medicine.medical_specialty Sentinel lymph node Breast Neoplasms Mastectomy Segmental Effective dose (radiation) 030218 nuclear medicine & medical imaging 03 medical and health sciences Kerma 0302 clinical medicine Breast cancer Occupational Exposure medicine Humans Gamma Cameras Medical Waste Disposal Radiation Injuries Radionuclide Imaging Technetium Tc 99m Aggregated Albumin Sentinel Lymph Node Biopsy business.industry General surgery General Medicine Contamination medicine.disease Oncology Lymphatic Metastasis 030220 oncology & carcinogenesis Lymph Node Excision Female Lymph Nodes Radiopharmaceuticals Radiation protection business Nuclear medicine Quadrantectomy Gamma probe |
| Zdroj: | Tumori Journal. 86:372-374 |
| ISSN: | 2038-2529 0300-8916 |
| Popis: | The aim of this study was to estimate the radioactive risk for surgical staff performing radioguided sentinel lymph node (SN) biopsy and to calculate the contamination level in the operating room for assessment of the possible need for specific radiation protection procedures. We studied 20 patients who were selected for quadrantectomy and SN biopsy. The day before surgery a volume of 0.15 mL of 99mTc-nanocoll was injected: the activity was 3.11 ± 0.85 MBq in group A (15 pts) and 11.6 ± 0.6 MBq in group B (5 pts). External radiation to staff was evaluated by measuring the exposure rate in air one hour after radiopharmaceutical administration. The air KERMA rate during surgery was estimated considering the physical decay of 99mTc. Contamination of disposable materials and surgical instruments in the operating room was measured using a contamination monitor, whereas the residual activity in the SN and the injection site was measured with a gamma probe. The exposure rate at 20 cm from the injection site was 0.75 μSv/h when the most radioactive patients (group B) were treated. Contamination in the operating room proved to be negligible. Considering the number of radioguided treatments carried out by a surgeon in one year, an equivalent effective dose of 0.075 mSv was estimated; the recommended dose limit according to the relevant Italian law, DL 230/95, is 1 mSv/yr. Surgical staff therefore do not require a classification of “exposed workers'’ and there is no need to supply the operating room with special containers for radioactive waste. |
| Databáze: | OpenAIRE |
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