Measures to Reduce Occupational Radiation Exposure in Clinical PET-A Study at Nishidai Clinic Diagnostic Imaging Center-

In this study, we estimated the ambient dose equivalent rate (hereafter "dose rate") in the fluoro-2-deoxy-D-glucose (FDG) administration room in our hospital using Monte Carlo simulations, and examined the appropriate medical-personnel locations and a shielding method to reduce the dose rate during FDG injection using a lead glass shield. The line source was assumed to be the FDG feed tube and the patient a cube source. The dose rate distribution was calculated with a composite source that combines the line and cube sources. The dose rate distribution was also calculated when a lead glass shield was placed in the rear section of the lead-acrylic shield. The dose rate behind the automatic administration device decreased by 87 % with respect to that behind the lead-acrylic shield. Upon positioning a 2.8-cm-thick lead glass shield, the dose rate behind the lead-acrylic shield decreased by 67 %.

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Estimation of ambient dose equivalent distribution in the 18F-FDG administration room using Monte Carlo simulation

Nagamine

Umezu

Himuro

et al. 2016

Radiol Phys Technol

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Whole-body MRI with Diffusion-weighted Imaging for the Detection of Metastases after Surgical Resection for Breast Cancer

Osanai

Uehira

Murakata

et al. 2021

JJCS

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Reducing the Rate of Radiation Exposure through Lateral Contact of Patients Undergoing Radionuclide Examination

Miura

Odashima²

2012

Nippon Hoshasen Gijutsu Gakkai Zasshi

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During examinations using radionuclide methods, technicians sometimes need to interact directly with patients. The initial point of contact is when they assist patients onto the examination table, the second is when the patients are positioned for radionuclide examination, and the third occurs if the patients experience a sudden change in condition and assistance is deemed necessary. The dose of radiation increases proportionately to the size of the area being treated. Therefore, we verified that the lateral area received a lower dose of radiation than the anterior areas because of their smaller surface area. The doses in the anterior and lateral areas of the patients were measured following administration of (99m)Tc-hydroxymethyl enebisphosphonic acid (HMDP), (131)I, (18)F-fluoro-2-deoxy-d-glucose ((18)F-FDG), and (99m)Tc-galactosyl-human serum albumin-diethylenetriamine-pentaacetic acid (GSA). The lateral/anterior (L/A) ratio was defined as an approximation of the ratio of measured values of the lateral and anterior areas; it was calculated as follows: L/A (%)=[(lateral dose-BG)/(anterior dose-BG)]×100. In all patients, the radiation dose rate from the lateral areas was lower than from the anterior areas. L/A was 52% with (99m)Tc-HMDP, 51% with (131)I, 58% with (18)F-FDG, and 33% with (99m)Tc-GSA, and radiation doses were found to be reduced by approximately 50% when interaction with patients was from the lateral side rather than the anterior side. Therefore, we confirmed that when interacting closely with patients undergoing radionuclide examinations, it is best to approach the patients from the lateral side in order to reduce radioactive exposure of the technicians.

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Measures to Reduce Occupational Radiation Exposure in Clinical PET-A Study at Nishidai Clinic Diagnostic Imaging Center-

Cited by 5 publications

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Estimation of ambient dose equivalent distribution in the 18F-FDG administration room using Monte Carlo simulation

Estimation of ambient dose equivalent distribution in the 18F-FDG administration room using Monte Carlo simulation

Whole-body MRI with Diffusion-weighted Imaging for the Detection of Metastases after Surgical Resection for Breast Cancer

Reducing the Rate of Radiation Exposure through Lateral Contact of Patients Undergoing Radionuclide Examination

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