| Autor: |
H. G., Cañizares, H., Wakabayashi, T., Satoru, T., Mochizuki, S., Kinuya, Kok, Kuan-Ying, Ng, Yen, Zin, Muhammad Rawi Muhamed, Mahmood, Zal U'yun Wan, Ahmad, Zaiton, Idris, Faridah Mohamad, Mahmoud, Mahdi Ezwan, Sipaun, Susan Maria, Talib, Marina, Leo, Kwee-Wah, Hak, Cik Rohaida Che, Mohamed, Nor Hasimah, Murshidi, Julie Andrianny, Wee, Boon-Siong |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2295 Issue 1, p1-9, 9p |
| Abstrakt: |
A PET-CT procedure has many steps that contribute to the occupational radiation exposure of a nuclear medicine staff. Most of them are well studied, measured, and documented except for the radiation emission of an actual PET acquisition. This study aims to fill that knowledge gap. We measure the estimated whole-body radiation exposure to nuclear medicine staff during a PET acquisition of a routine whole-body PET-CT procedure by electronic pocket dosimeters for 1 month at a distance of 1.0, 1.5, 2.0, and 3.0 m from the center of the PET-CT machine. PET acquisition radiation emission measurements of 159 subjects (83 M, 76 F) who underwent whole-body PET-CT were included in the study. Average radiation emission rate at 1.0, 1.5, 2.0, and 3.0 m from the center of the PET-CT machine were; 6.94 0.85, 0.14 0.60, 0.99 1.38 and 0.02 0.22 µSv/hr respectively. In our study, based on subject's weight, emission rates follow the general rule in radiation emission, the heavier the subject, the higher the radiation. Among the different types of malignancy evaluated by PET-CT, lymphoma exhibited the highest emission rate at 5.4 µSv/hr, followed by thyroid and lung cancer at 4.48 and 4.26 µSv/hr, respectively (p ¡ 0.001). The estimated annual radiation emission from a PET acquisition was 3.98 (1.0 m), 0.08 (1.5 m), 0.58 (2.0 m) and 0.01 (3.0 m) mSv/yr. Computed annual whole-body occupational dose rate are the following 9.74 (1.0 m), 5.84 (1.5 m), 6.34 (2.0 m), 5.77 (3.0 m) mSv/yr, respectively, which are below the regulatory limit (p <0.001). Computed annual radiation emission from a PET acquisition of a whole-body PET-CT procedure, was relatively low. Incorporating this data to other radiation-emitting PET-CT steps, annual occupational radiation exposure estimate to the nuclear medicine staff will not exceed regulatory limit. Lymphoma showed the highest radiation emission rates among the different types of malignancy but data is inconclusive. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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