Strategy to Reduce the Collective Equivalent Dose for the Lens of the Physician’s Eye Using Short Radiation Protection Curtains to Prevent Cataracts

Nakagami, Koichi; Moritake, Takashi; Nagamoto, Keisuke; Morota, Koichi; Matsuzaki, Satoru; Kuriyama, Tomoko; Kunugita, Naoki

doi:10.3390/diagnostics11081415

Cited by 7 publications

(6 citation statements)

References 29 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the field of radiation medicine, exposure of patients and staff to radiation is an issue of great importance [28][29][30][31][32][33][34][35][36][37]. To date, many studies have evaluated radiation doses and protection from exposure [38][39][40][41][42][43]. Our laboratory has also published many research papers on patient radiation measurements, occupational exposure evaluation, and how to reduce radiation doses [44][45][46][47].…”

Section: Discussionmentioning

confidence: 99%

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

Yamamoto,

Shindo,

Ohno

et al. 2024

Sensors

View full text Add to dashboard Cite

After the Fukushima nuclear power plant accident in 2011, many types of survey meters were used, including Geiger–Müller (GM) survey meters, which have long been used to measure β-rays. Recently, however, a novel radiation survey meter that uses a plastic-scintillation sensor has been developed. Although manufacturers’ catalog data are available for these survey meters, there have been no user reports on performance. In addition, the performance of commercial plastic-scintillation survey meters has not been evaluated. In this study, we experimentally compared the performance of a plastic-scintillation survey meter with that of a GM survey meter. The results show that the two instruments performed very similarly in most respects. The GM survey meter exhibited count losses when the radiation count rate was high, whereas the plastic-scintillation survey meter remained accurate under such circumstances, with almost no count loss at high radiation rates. For measurements at background rates (i.e., low counting rates), the counting rates of the plastic-scintillation and GM survey meters were similar. Therefore, an advantage of plastic-scintillation survey meters is that they are less affected by count loss than GM survey meters. We conclude that the plastic-scintillation survey meter is a useful β-ray measuring/monitoring instrument.

show abstract

Section: Discussionmentioning

confidence: 99%

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

Yamamoto,

Shindo,

Ohno

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…It was also revealed that the radioprotective curtain did not significantly reduce the scattered radiation from the X-ray tube because a mesh material was used for the part that covered the X-ray tube housing for weight reduction and heat dissipation. A study by Nakagami et al [ 23 ] showed a change in the scattered dose distribution when a custom-made lead radioprotective curtain with a 30 cm length was used; however, they measured the scattered dose distribution only near the head of the physician. We believe that their results differed from the current study as we measured the scattered dose distribution 150 cm above the floor.…”

Section: Discussionmentioning

confidence: 99%

Effect of radioprotective curtain length on the scattered dose rate distribution and endoscopist eye lens dose with an over-couch fluoroscopy system

Matsubara,

Nakajima,

Hirosawa

et al. 2024

Phys Eng Sci Med

View full text Add to dashboard Cite

Sufficient dose reduction may not be achieved if radioprotective curtains are folded. This study aimed to evaluate the scattered dose rate distribution and physician eye lens dose at different curtain lengths. Using an over-couch fluoroscopy system, dH*(10)/dt was measured using a survey meter 150 cm from the floor at 29 positions in the examination room when the curtain lengths were 0% (no curtain), 50%, 75%, and 100%. The absorbed dose rates in the air at the positions of endoscopist and assistant were calculated using a Monte Carlo simulation by varying the curtain length from 0 to 100%. The air kerma was measured by 10 min fluoroscopy using optically stimulated luminescence dosimeters at the eye surfaces of the endoscopist phantom and the outside and inside of the radioprotective goggles. At curtain lengths of 50%, 75%, and 100%, the ratios of dH*(10)/dt relative to 0% ranged from 80.8 to 104.1%, 10.5 to 61.0%, and 11.8 to 24.8%, respectively. In the simulation, the absorbed dose rates at the endoscopist’s and assistant’s positions changed rapidly between 55 and 75% and 65% and 80% of the curtain length, respectively. At the 0%, 50%, 75%, and 100% curtain lengths, the air kerma at the left eye surface of the endoscopist phantom was 237 ± 29, 271 ± 30, 37.7 ± 7.5, and 33.5 ± 6.1 μGy, respectively. Therefore, a curtain length of 75% or greater is required to achieve a sufficient eye lens dose reduction effect at the position of the endoscopist.

show abstract

“…Our results also imply that neck badges may overestimate the lens doses to cardiac IVR nurses, as evidenced by the mean value of the neck badge dose/lens dose being greater than 1 on both sides. This may have been because nurses are often close to the patient during ABL, which exposes their neck to the scattered radiation [ 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. In line with our results, a previous study reported that neck badges may overestimate the lens dose of nurses during interventional cardiology procedures [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Eye Lens Radiation Dose to Nurses during Cardiac Interventional Radiology: An Initial Study

Yamada,

Haga,

Sota

et al. 2023

Diagnostics

View full text Add to dashboard Cite

Although interventional radiology (IVR) is preferred over surgical procedures because it is less invasive, it results in increased radiation exposure due to long fluoroscopy times and the need for frequent imaging. Nurses engaged in cardiac IVR receive the highest lens radiation doses among medical workers, after physicians. Hence, it is important to measure the lens exposure of IVR nurses accurately. Very few studies have evaluated IVR nurse lens doses using direct dosimeters. This study was conducted using direct eye dosimeters to determine the occupational eye dose of nurses engaged in cardiac IVR, and to identify simple and accurate methods to evaluate the lens dose received by nurses. Over 6 months, in a catheterization laboratory, we measured the occupational dose to the eyes (3 mm dose equivalent) and neck (0.07 mm dose equivalent) of nurses on the right and left sides. We investigated the relationship between lens and neck doses, and found a significant correlation. Hence, it may be possible to estimate the lens dose from the neck badge dose. We also evaluated the appropriate position (left or right) of eye dosimeters for IVR nurses. Although there was little difference between the mean doses to the right and left eyes, that to the right eye was slightly higher. In addition, we investigated whether it is possible to estimate doses received by IVR nurses from patient dose parameters. There were significant correlations between the measured doses to the neck and lens, and the patient dose parameters (fluoroscopy time and air kerma), implying that these parameters could be used to estimate the lens dose. However, it may be difficult to determine the lens dose of IVR nurses accurately from neck badges or patient dose parameters because of variation in the behaviors of nurses and the procedure type. Therefore, neck doses and patient dose parameters do not correlate well with the radiation eye doses of individual IVR nurses measured by personal eye dosimeters. For IVR nurses with higher eye doses, more accurate measurement of the radiation doses is required. We recommend that a lens dosimeter be worn near the eyes to measure the lens dose to IVR nurses accurately, especially those exposed to relatively high doses.

show abstract

Strategy to Reduce the Collective Equivalent Dose for the Lens of the Physician’s Eye Using Short Radiation Protection Curtains to Prevent Cataracts

Cited by 7 publications

References 29 publications

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

Basic Performance Evaluation of a Radiation Survey Meter That Uses a Plastic-Scintillation Sensor

Effect of radioprotective curtain length on the scattered dose rate distribution and endoscopist eye lens dose with an over-couch fluoroscopy system

Eye Lens Radiation Dose to Nurses during Cardiac Interventional Radiology: An Initial Study

Contact Info

Product

Resources

About