Characterization of Small Dosimeters Used for Measurement of Eye Lens Dose for Medical Staff during Fluoroscopic Examination

Matsubara, Kosuke; Yoshida, Sayu; Hirosawa, Ayaka; Chusin, Thunyarat; Furukawa, Yasushi

doi:10.3390/diagnostics11020150

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…The response of the nanoDot in terms of dose linearity was linearly proportional to the exposure in the studies by Al-Senan and Hatab [11] and Matsubara et al [12]. Additionally, the present study revealed that the nanoDot had excellent linearity (R 2 = 1.00) with the air kerma up to 21.4 mGy.…”

Section: Discussionsupporting

confidence: 73%

“…However, studies using the Vision badge were limited to those for staff at the Fukushima Daiichi Nuclear Power Plant in Japan [9] and the nuclear medicine department [10]. Although basic characteristics of small optically stimulated luminescence (OSL) dosimeters (nanoDot; Landauer, Glenwood, IL, USA) has been reported [11,12], there are no papers describing their basic characteristics for Vision badge, and no manufacturer data has been disclosed.…”

Section: Introductionmentioning

confidence: 99%

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Basic characteristics of Vision badge and its performance as an eye lens dosimeter for endoscopists

Fukushima,

Matsubara,

Ichikawa

2024

J. Radiol. Prot.

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Vision badge is an eye lens dosimeter to measure H p(3). This study aimed to evaluate the basic characteristics of the Vision badge and its performance as an eye lens dosimeter for endoscopists by phantom study. Energy dependence was evaluated by changing the tube voltage to 50 kV (effective energy of 27.9 keV), 80 kV (32.2 keV), and 120 kV (38.7 keV). Dose linearity was evaluated by changing the number of irradiation to 1, 5, and 40 times, which corresponded to 0.53, 5.32, and 21.4 mGy. Batch uniformity was evaluated by calculating the coefficient of variation of H p(3) obtained from 10 Vision badges. Angular dependence was evaluated at 0° (perpendicular to the incident direction of x-rays), 30°, 60°, 75°, and 90°. The Vision badge and optically stimulated luminescence (OSL) dosimeter were attached to the inside of the radioprotective glasses, worn on the endoscopist phantom, and the H p(3) obtained from both dosimeters were compared. The H p(3) obtained from the Vision badge with 38.7 keV was 3.8% higher than that with 27.9 keV. The Vision badge showed excellent linearity (R2 = 1.00) with the air kerma up to 21.4 mGy. The coefficient of variation of the H p(3) for 10 Vision badges was 3.47%. The relative dose of the Vision badge decreased as the angle increased up to 75°, but increased at 90°. The H p(3) obtained by the OSL dosimeter and the Vision badge were decreased as the endoscopist phantom was turned away from the patient phantom. The H p(3) that was obtained by the Vision badge was 35.5%–55.0% less than that obtained by the nanoDot. In conclusion, the Vision badge showed specific angular dependence due to its shape, but satisfactory basic properties were exhibited for all characteristics. In phantom study, the Vision badge showed generally similar trends with the OSL dosimeter.

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Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Basic characteristics of Vision badge and its performance as an eye lens dosimeter for endoscopists

Fukushima,

Matsubara,

Ichikawa

2024

J. Radiol. Prot.

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“…Although they need to learn about disaster exposure and counseling, they may become personnel who can be responsible for responding to residents' concerns about disaster exposure in the event of a radiation disaster. They also play an important role in occupational radiation protection in facilities with medical radiation equipment [27][28][29][30][31][32][33][34][35][36][37][38]. Radiation safety measures are necessary for medical radiologic technologists, who are familiar with radiation risks and protection [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Awareness of Medical Radiologic Technologists of Ionizing Radiation and Radiation Protection

Yashima

Chida

2022

IJERPH

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Japanese people experienced the Hiroshima and Nagasaki atomic bombings, the Japan Nuclear Fuel Conversion Co. criticality accident, it was found that many human resources are needed to respond to residents’ concerns about disaster exposure in the event of a radiation disaster. Medical radiologic technologists learn about radiation from the time of their training, and are engaged in routine radiographic work, examination explanations, medical exposure counseling, and radiation protection of staff. By learning about nuclear disasters and counseling, we believe they can address residents’ concerns. In order to identify items needed for training, we examined the perceptions of medical radiologic technologists in the case of different specialties, modalities and radiation doses. In 2016, 5 years after the Fukushima Daiichi nuclear power plant accident, we conducted a survey of 57 medical radiologic technologists at two medical facilities with different specialties and work contents to investigate their attitudes toward radiation. 42 participants answered questions regarding sex, age group, presence of children, health effects of radiation exposure, radiation control, generation of X rays by diagnostic X ray equipment, and radiation related units. In a comparison of 38 items other than demographic data, 14 showed no significant differences and 24 showed significant differences. This study found that perceptions of radiation were different among radiology technologists at facilities with different specialties. The survey suggested the possibility of identifying needed training items and providing effective training.

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“…OSLDs' potential in medical dosimetry was recognized due to their excellent reproducibility, negligible angular dependence, and small size suitable for point measurements. OSLDs are increasingly used for the evaluation of radiation doses in diagnostic radiology [20,21], such as eye lens doses of medical staff during fluoroscopic examination [22] and occupational radiation dose during fluoroscopy-guided interventional procedures [23].…”

Section: Introductionmentioning

confidence: 99%

Radiation Dose Assessment of the Fog Lead Acrylic Shields during Coronary Angiography: A Phantom Study

et al. 2021

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This study aimed to evaluate the effects of fogging on the effectiveness of a lead glass shield in protecting an operator from radiation exposure during conventional coronary angiography (CAG). Optically stimulated luminescence dosimeters (OSLDs) were used to measure the effects of fogged lead glass shields (FLSs) and clear lead glass shields (CLSs) on the radiation doses of a cardiac catheterization surgeon. We simulated the scatter radiation incident on the operator with five angiographic projections with 10-s exposures. Experiments were conducted with a field of view of 25 cm, maximum of 100 cm between the X-ray tube and image intensifier, and 80 cm between the image intensifier and operator. Lead glass fogging had no significant effect at any angiographic projection. The average dose at the lens of the eye, thyroid glands, and gonads did not differ significantly between FLS and CLS. Although most surgeons view ceiling-suspended shields as hindrances during surgical procedures, the radiation dose at the operator’s eyes and thyroid glands increased by 13 and 10 times without the shield. The fogging of the shield is probably caused by post-surgery UV decontamination or detergents. An operator has no cause for concern regarding the radiation protection afforded by an FLS during CAG procedures.

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Characterization of Small Dosimeters Used for Measurement of Eye Lens Dose for Medical Staff during Fluoroscopic Examination

Cited by 8 publications

References 20 publications

Basic characteristics of Vision badge and its performance as an eye lens dosimeter for endoscopists

Basic characteristics of Vision badge and its performance as an eye lens dosimeter for endoscopists

Awareness of Medical Radiologic Technologists of Ionizing Radiation and Radiation Protection

Radiation Dose Assessment of the Fog Lead Acrylic Shields during Coronary Angiography: A Phantom Study

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