Performance of the DOSIRIS<b>™</b> eye lens dosimeter

Ishii, Hiroki; Haga, Yoshinori; Sota, Masahiro; Inaba, Yohei; Chida, Koichi

doi:10.1088/1361-6498/ab2729

Cited by 32 publications

(15 citation statements)

References 27 publications

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“…As shown in Table 2 and Figure 2, the radiation eye dose received by physicians involved in CTF procedures was underestimated by approximately two-fold when using neck badge measurements compared with the direct eye dosimeter measurements carried out using DOSIRIS, although the correlation between the eye and neck dosimeter measurements was high (right side: R 2 = 0.82; left sides: R 2 = 0.55). This may have been because the angular dependences of the DOSIRIS show better dose responses at almost all angles than that of the neck badge [59]. Hence,…”

Section: Discussionmentioning

confidence: 99%

Radiation Eye Dose for Physicians in CT Fluoroscopy-Guided Biopsy

et al. 2022

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It is important to evaluate the radiation eye dose (3 mm dose equivalent, Hp (3)) received by physicians during computed tomography fluoroscopy (CTF)-guided biopsy, as physicians are close to the source of scattered radiation. In this study, we measured the radiation eye dose in Hp (3) received by one physician during CTF in a timeframe of 18 months using a direct eye dosimeter, the DOSIRISTM. The physician placed eye dosimeters above and under their lead (Pb) eyeglasses. We recorded the occupational radiation dose received using a neck dosimeter, gathered CT dose-related parameters (e.g., CT-fluoroscopic acquisition number, CT-fluoroscopic time, and CT-fluoroscopic mAs), and performed a total of 95 procedures during CTF-guided biopsies. We also estimated the eye dose (Hp (3)) received using neck personal dosimeters and CT dose-related parameters. The physician eye doses (right and left side) received in terms of Hp (3) without the use of Pb eyeglasses for 18 months were 2.25 and 2.06 mSv, respectively. The protective effect of the Pb eyeglasses (0.5 mm Pb) on the right and left sides during CTF procedures was 27.8 and 37.5%, respectively. This study proved the existence of significant correlations between the eye and neck dose measurement (right and left sides, R2 = 0.82 and R2 = 0.55, respectively) in physicians. In addition, we found significant correlations between CT-related parameters, such as CT-fluoroscopy mAs, and radiation eye doses (right and left sides, R2 = 0.50 and R2 = 0.52, respectively). The eye dose of Hp (3) received in CTF was underestimated when evaluated using neck dosimeters. Therefore, we suggest that the physician involved in CTF use a direct eye dosimeter such as the DOSIRIS for the accurate evaluation of their eye lens dose.

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Section: Discussionmentioning

confidence: 99%

Radiation Eye Dose for Physicians in CT Fluoroscopy-Guided Biopsy

et al. 2022

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“…Furthermore, most IVR physicians stand close to the patient where the scattered radiation and consequently the physicians’ exposure is higher. Therefore, radiation protection/measurement for the physician during IVR poses a very important problem [ 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ].…”

Section: Discussionmentioning

confidence: 99%

Non-Lead Protective Aprons for the Protection of Interventional Radiology Physicians from Radiation Exposure in Clinical Settings: An Initial Study

et al. 2021

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Radiation protection/evaluation during interventional radiology (IVR) poses a very important problem. Although IVR physicians should wear protective aprons, the IVR physician may not tolerate wearing one for long procedures because protective aprons are generally heavy. In fact, orthopedic problems are increasingly reported in IVR physicians due to the strain of wearing heavy protective aprons during IVR. In recent years, non-Pb protective aprons (lighter weight, composite materials) have been developed. Although non-Pb protective aprons are more expensive than Pb protective aprons, the former aprons weigh less. However, whether the protective performance of non-Pb aprons is sufficient in the IVR clinical setting is unclear. This study compared the ability of non-Pb and Pb protective aprons (0.25- and 0.35-mm Pb-equivalents) to protect physicians from scatter radiation in a clinical setting (IVR, cardiac catheterizations, including percutaneous coronary intervention) using an electric personal dosimeter (EPD). For radiation measurements, physicians wore EPDs: One inside a personal protective apron at the chest, and one outside a personal protective apron at the chest. Physician comfort levels in each apron during procedures were also evaluated. As a result, performance (both the shielding effect (98.5%) and comfort (good)) of the non-Pb 0.35-mm-Pb-equivalent protective apron was good in the clinical setting. The radiation-shielding effects of the non-Pb 0.35-mm and Pb 0.35-mm-Pb-equivalent protective aprons were very similar. Therefore, non-Pb 0.35-mm Pb-equivalent protective aprons may be more suitable for providing radiation protection for IVR physicians because the shielding effect and comfort are both good in the clinical IVR setting. As non-Pb protective aprons are nontoxic and weigh less than Pb protective aprons, non-Pb protective aprons will be the preferred type for radiation protection of IVR staff, especially physicians.

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“…In contrast, the VISION (Nagase‐Landauer, Ltd.) and DOSIRIS (Chiyoda Technol Co. Ltd., Tokyo, Japan) dosimeters for eye lenses (eye lens dosimeter) are placed on a narrow headband adjacent to or near the eyes or on personal protective eyewear. 17 , 21 This allows measurement at only H p (3), which is the appropriate depth with which to estimate eye lens doses. A small optically stimulated luminescence (OSL) dosimeter, namely, “nanoDot” (Nagase‐Landauer, Ltd.), can obtain H p (0.07).…”

Section: Methodsmentioning

confidence: 99%

Determination of a reliable assessment for occupational eye lens dose in nuclear medicine

Miyaji

Miwa

Iimori

et al. 2022

J Applied Clin Med Phys

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The most recent statement published by the International Commission on Radiological Protection describes a reduction in the maximum allowable occupational eye lens dose from 150 to 20 mSv/year (averaged over 5-year periods). Exposing the eye lens to radiation is a concern for nuclear medicine staff who handle radionuclide tracers with various levels of photon energy. This study aimed to define the optimal dosimeter and means of measuring the amount of exposure to which the eye lens is exposed during a routine nuclear medicine practice. A RANDO human phantom attached to Glass Badge and Luminess Badge for body or neck, DOSIRIS and VISION for eyes, and nanoDot for body, neck, and eyes was exposed to 99m Tc, 123 I, and 18 F radionuclides. Sealed syringe sources of each radionuclide were positioned 30 cm from the abdomen of the phantom. Estimated exposure based on measurement conditions (i.e., air kerma rate constants, conversion coefficient, distance, activity, and exposure time) was compared measured dose equivalent of each dosimeter. Differences in body, neck, and eye lens dosimeters were statistically analyzed. The 10-mm dose equivalent significantly differed between the Glass Badge and Luminess Badge for the neck, but these were almost equivalent at the body. The 0.07-mm dose equivalent for the nanoDot dosimeters was greatly overestimated compared to the estimated exposure of 99m Tc and 123 I radionuclides. Measured dose equivalents of exposure significantly differed between the body and eye lens dosimeters with respect to 18 F. Although accurately measuring radiation exposure to the eye lenses of nuclear medicine staff is conventionally monitored using dosimeters worn on the chest or abdomen, eye lens dosimeters that provide a 3-mm dose equivalent near the eye would be a more reliable means of assessing radiation doses in the mixed radiation environment of nuclear medicine.

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Performance of the DOSIRIS™ eye lens dosimeter

Cited by 32 publications

References 27 publications

Radiation Eye Dose for Physicians in CT Fluoroscopy-Guided Biopsy

Radiation Eye Dose for Physicians in CT Fluoroscopy-Guided Biopsy

Non-Lead Protective Aprons for the Protection of Interventional Radiology Physicians from Radiation Exposure in Clinical Settings: An Initial Study

Determination of a reliable assessment for occupational eye lens dose in nuclear medicine

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