핵의학 영상검사에서 Pocket dosimeter 착용의 유용성 평가

Usefulness of wearing pocket dosimeter in nuclear medicine

Purpose: The aim of study is to find accuracy of pocket dosimeter in measuring exposed dose in compared with survey meter and to compare exposed dose according as Nuclear medicine exams. Materials and Method: First, radiation dose to point source(185 MBq,370 MBq, ..., 1665 MBq, 1850 MBq) were measured in using a pocket dosimeter and a survey meter. Second, radiation dose to 12 patients injected ¹⁸F-FDG 370 MBq were measured in using a pocket dosimeter and a survey meter. Third, radiation dose to 10 patients injected ⁹⁹ᵐTc-DPD 925 MBq were measured in using a pocket dosimeter and a surveymeter. Result: The average is 70.12±39.36 μSv/h in measurement of point source with Surveymeter and 5±3.06 μSv in measurement of point source with Pocket dosimeter. The average is 25.04±6.16 μSv/h in measurement of PET/CT patients with Surveymeter and 2.41±0.51 μSv in measurement of PET/CT with Pocket dosimeter. The average is 8.58±0.96 μSv/h in measurement of Bone Scan patients with Surveymeter and 1 μSv in measurement of Bone Scan patients with Pocket dosimeter. Significant difference found between Survey meter value and Pocket dosimeter value in all experimentation (p<0.001). Conclusion: Accoring to rusult Wearing Pocket dosimeter is usefulnee in manerage of exposed dose in nucler medicine exams.