scholarly journals Evaluation of calibration factor of OSLD toward eye lens exposure dose measurement of medical staff during IVR

2020 ◽  
Vol 21 (11) ◽  
pp. 263-271
Author(s):  
Takashi Asahara ◽  
Hiroaki Hayashi ◽  
Sota Goto ◽  
Natsumi Kimoto ◽  
Kazuki Takegami ◽  
...  
Keyword(s):  
Medical Staff ◽  
Exposure Dose ◽  
Calibration Factor ◽  
Eye Lens ◽  
Dose Measurement

scholarly journals Proposal for Reduction Measures of Eye Lens Exposure Based on Actual Exposure Management in Radiation-exposed Medical Staff

2021 ◽  
Vol 77 (2) ◽  
pp. 160-171
Author(s):  
Toshioh Fujibuchi ◽  
Katsuya Fujita ◽  
Takayuki Igarashi ◽  
Eiji Nishimaru ◽  
Shogo Horita ◽  
...  
Keyword(s):  
Medical Staff ◽  
Eye Lens

DEVELOPMENT OF A JAPANESE INFANT HEAD–CHEST PHANTOM AND INVESTIGATION OF THE CURRENT STATUS OF INFANT HEAD CT EXAMINATIONS IN JAPAN

2019 ◽  
Vol 188 (1) ◽  
pp. 65-72
Author(s):  
C Yamauchi-Kawaura ◽  
K Fujii ◽  
M Yamauchi ◽  
K Imai ◽  
M Ikeda ◽  
...  
Keyword(s):  
Exposure Dose ◽  
Current Status ◽  
Average Dose ◽  
Dose Measurement ◽  
Organ Doses ◽  
Head Ct ◽  
Thyroid Glands ◽  
Head Computed Tomography ◽  
The Brain ◽  
Machine Processing

Abstract The aim of this study was to develop a head–chest phantom that could mimic the physique of a Japanese 0.5-year-old child and to investigate the current status of exposure dose in infant head computed tomography examinations in Japan. The phantom was produced by machine processing, and radiophotoluminescence glass dosemeters were installed in the phantom for dose measurement. Organ doses were measured for seven different head scan protocols routinely used in three hospitals. In this study, the average dose of the brain and lens within the scan region was equivalent to that measured using infant phantoms in previous studies. In contrast, the doses of both salivary glands and thyroid glands adjacent to the scan region were 1.4–1.8 times higher than those in previous studies. Expansion of the scan area accompanied by a transition of the scan mode from non-helical to helical may have resulted in the differences in organ doses.

scholarly journals ESTIMATION OF HP(3) AMONG STAFF MEMBERS IN TWO NUCLEAR MEDICINE UNITS IN FINLAND

2020 ◽  
Vol 190 (2) ◽  
pp. 176-184
Author(s):  
C Lindholm ◽  
A Pekkarinen ◽  
O Sipilä ◽  
A-L Manninen ◽  
M Lehtinen ◽  
...  
Keyword(s):  
Nuclear Medicine ◽  
Eye Lens ◽  
Dose Measurement ◽  
Individual Dose ◽  
Dose Equivalent ◽  
University Hospitals ◽  
Staff Members

Abstract The eye lens exposure among 16 technicians in two nuclear medicine departments at university hospitals in Finland was investigated by measuring the operational quantity Hp(3) using EYE-D dosemeters. For all workers, the annual mean Hp(3) was estimated to be 1.1 mSv (max. 3.9 mSv). The relation between Hp(3) to routinely monitored personal dose equivalent Hp(10) was clearly correlated. Considering individual dose measurement periods (2–4 weeks), the Hp(3)/Hp(10) ratio was 0.7 (Pearson’s coefficient r = 0.90, p < 0.001, variation of ratio 0.1–2.3). The variation decreased considerably with increasing Hp(10) (σ2 = 0.04 vs. 0.43 for Hp(10) > 0.1 mSv vs. < 0.1 mSv, respectively), i.e. higher Hp(10) predicts Hp(3) more reliably. Moreover, annual Hp(10) data from national dose register during 2009–2018 were used to derive the annual Hp(3) applying the Hp(3)/Hp(10) ratio. The data from Finnish nuclear medicine departments imply that routine measurements of Hp(3) among nuclear medicine technicians are not justified.

Dose measurement for medical staff with glass dosemeters and thermoluminescence dosemeters during 125I brachytherapy for prostate cancer

2011 ◽  
Vol 144 (1-4) ◽  
pp. 459-463 ◽  
Author(s):  
K. Fujii ◽  
S. Ko ◽  
Y. Nako ◽  
A. Tonari ◽  
K. Nishizawa ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Medical Staff ◽  
Dose Measurement ◽  
125I Brachytherapy

A MC study on the eye lens dose distribution for medical staff in interventional radiology

2016 ◽  
Vol 32 ◽  
pp. 260
Author(s):  
Anna Zagorska ◽  
Kristina Bliznakova ◽  
Annalisa Trianni ◽  
Jenia Vassileva
Keyword(s):  
Interventional Radiology ◽  
Dose Distribution ◽  
Medical Staff ◽  
Eye Lens ◽  
Eye Lens Dose

Extremity and eye lens dosimetry for medical staff performing vertebroplasty and kyphoplasty procedures

2013 ◽  
Vol 33 (3) ◽  
pp. 635-645 ◽  
Author(s):  
L Struelens ◽  
W Schoonjans ◽  
F Schils ◽  
K De Smedt ◽  
F Vanhavere
Keyword(s):  
Medical Staff ◽  
Eye Lens

scholarly journals Occupational Radiation Dose, Especially for Eye Lens: Hp(3), in Medical Staff Members Involved in Computed Tomography Examinations

2021 ◽  
Vol 11 (10) ◽  
pp. 4448
Author(s):  
Minoru Osanai ◽  
Hidenori Sato ◽  
Kana Sato ◽  
Kohsei Kudo ◽  
Masahiro Hosoda ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Radiation Protection ◽  
Medical Staff ◽  
Shielding Effect ◽  
Eye Lens ◽  
Radiological Protection ◽  
Ct Examination ◽  
Radiation Dose Exposure ◽  
Occupational Radiation

Radiation dose management of medical staff has become increasingly important. Particularly, based on the statement by the International Commission on Radiological Protection (ICRP) in 2011, a new lower equivalent dose limit for the eye lens is being established in each country. Although many reports have discussed the occupational radiation dose in interventional radiology (IR), few studies have examined the dose during computed tomography (CT) examinations. This study investigated the radiation dose exposure to medical staff present in the CT room during irradiation, with particular focus on the exposure to eye lens. The radiation dose exposure to those who assist patients during head, chest and upper abdomen CT examination was measured in a phantom study. The radiation dose exposure with scattered radiation was never negligible (i.e., high); Hp(3) was the highest in head CT examination, at 0.44 mSv per examination. Furthermore, the shielding effect of radiation protection glasses was large, and radiation protection glasses are useful tools for the medical staff who are involved in CT examinations. The justification and optimisation should be carefully considered in assistant actions.

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

Diagnostics ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 150
Author(s):  
Kosuke Matsubara ◽  
Sayu Yoshida ◽  
Ayaka Hirosawa ◽  
Thunyarat Chusin ◽  
Yasushi Furukawa
Keyword(s):  
Energy Dependence ◽  
Medical Staff ◽  
Vertical Direction ◽  
Eye Lens ◽  
X Rays ◽  
Air Kerma ◽  
Fluoroscopic Examination ◽  
Dose Linearity ◽  
Fluoroscopic Time ◽  
The Right

This study aimed to evaluate the property of small dosimeters used for measuring eye lens doses for medical staff during fluoroscopic examination. Dose linearity, energy dependence, and directional dependence of scattered X-rays were evaluated for small radiophotoluminescence glass dosimeters (RPLDs), those with a tin filter (Sn-RPLDs), and small optically stimulated luminescence dosimeters (OSLDs). These dosimeters were pasted on radioprotective glasses, and accumulated air kerma was obtained after irradiating the X-rays to a patient phantom. Strong correlations existed between fluoroscopic time and accumulated air kerma in all types of dosimeters. The energy dependence of Sn-RPLD and OSLD was smaller than that of RPLD. The relative dose value of the OSLD gradually decreased as the angle of the OSLD against the scattered X-rays was larger or lower than the right angle in the horizontal direction. The ranges of relative dose values of RPLD and Sn-RPLD were larger than that of OSLD in the vertical direction. The OSLDs showed lower doses than the RPLDs and Sn-RPLDs, especially on the right side of the radioprotective glasses. These results showed that RPLDs, Sn-RPLDs, and OSLDs had different dosimeter properties, and influence measured eye lens doses for the physician, especially on the opposite side of the patient.

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