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Derivation and application of dose reduction factors for protective eyewear worn in interventional radiology and cardiology

Magee, Jill S ; Martin, Colin J ; Sandblom, Viktor ; Carter, Matthew J ; Almén, Anja LU ; Cederblad, Åke ; Jonasson, Pernilla and Lundh, Charlotta (2014) In Journal of Radiological Protection 34(4). p.23-811
Abstract

Doses to the eyes of interventional radiologists and cardiologists could exceed the annual limit of 20 mSv proposed by the International Commission on Radiological Protection. Lead glasses of various designs are available to provide protection, but standard eye dosemeters will not take account of the protection they provide. The aim of this study has been to derive dose reduction factors (DRFs) equal to the ratio of the dose with no eyewear, divided by that when lead glasses are worn. Thirty sets of protective eyewear have been tested in x-ray fields using anthropomorphic phantoms to simulate the patient and clinician in two centres. The experiments performed have determined DRFs from simulations of interventional procedures by... (More)

Doses to the eyes of interventional radiologists and cardiologists could exceed the annual limit of 20 mSv proposed by the International Commission on Radiological Protection. Lead glasses of various designs are available to provide protection, but standard eye dosemeters will not take account of the protection they provide. The aim of this study has been to derive dose reduction factors (DRFs) equal to the ratio of the dose with no eyewear, divided by that when lead glasses are worn. Thirty sets of protective eyewear have been tested in x-ray fields using anthropomorphic phantoms to simulate the patient and clinician in two centres. The experiments performed have determined DRFs from simulations of interventional procedures by measuring doses to the eyes of the phantom representing the clinician, using TLDs in Glasgow, Scotland and with an electronic dosemeter in Gothenburg, Sweden. During interventional procedures scattered x-rays arising from the patient will be incident on the head of the clinician from below and to the side. DRFs for x-rays incident on the front of lead glasses vary from 5.2 to 7.6, while values for orientations similar to those used in the majority of clinical practice are between 1.4 and 5.2. Specialised designs with lead glass side shields or of a wraparound style with angled lenses performed better than lead glasses based on the design of standard spectacles. Results suggest that application of a DRF of 2 would provide a conservative factor that could be applied to personal dosemeter measurements to account for the dose reduction provided by any type of lead glasses provided certain criteria relating to design and consistency of use are applied.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Absorption, Radiation, Cardiology/instrumentation, Equipment Design, Equipment Failure Analysis, Eye Injuries/prevention & control, Eye Protective Devices, Humans, Occupational Diseases/prevention & control, Occupational Exposure/prevention & control, Radiation Dosage, Radiation Injuries/prevention & control, Radiation Protection/instrumentation, Radiology/instrumentation
in
Journal of Radiological Protection
volume
34
issue
4
pages
13 pages
publisher
IOP Publishing
external identifiers
  • scopus:84916600215
  • pmid:25332300
ISSN
1361-6498
DOI
10.1088/0952-4746/34/4/811
language
English
LU publication?
no
id
680e4863-1886-4109-8c7d-d7013a56e95f
date added to LUP
2018-06-16 21:17:51
date last changed
2021-02-17 05:54:59
@article{680e4863-1886-4109-8c7d-d7013a56e95f,
  abstract     = {<p>Doses to the eyes of interventional radiologists and cardiologists could exceed the annual limit of 20 mSv proposed by the International Commission on Radiological Protection. Lead glasses of various designs are available to provide protection, but standard eye dosemeters will not take account of the protection they provide. The aim of this study has been to derive dose reduction factors (DRFs) equal to the ratio of the dose with no eyewear, divided by that when lead glasses are worn. Thirty sets of protective eyewear have been tested in x-ray fields using anthropomorphic phantoms to simulate the patient and clinician in two centres. The experiments performed have determined DRFs from simulations of interventional procedures by measuring doses to the eyes of the phantom representing the clinician, using TLDs in Glasgow, Scotland and with an electronic dosemeter in Gothenburg, Sweden. During interventional procedures scattered x-rays arising from the patient will be incident on the head of the clinician from below and to the side. DRFs for x-rays incident on the front of lead glasses vary from 5.2 to 7.6, while values for orientations similar to those used in the majority of clinical practice are between 1.4 and 5.2. Specialised designs with lead glass side shields or of a wraparound style with angled lenses performed better than lead glasses based on the design of standard spectacles. Results suggest that application of a DRF of 2 would provide a conservative factor that could be applied to personal dosemeter measurements to account for the dose reduction provided by any type of lead glasses provided certain criteria relating to design and consistency of use are applied. </p>},
  author       = {Magee, Jill S and Martin, Colin J and Sandblom, Viktor and Carter, Matthew J and Almén, Anja and Cederblad, Åke and Jonasson, Pernilla and Lundh, Charlotta},
  issn         = {1361-6498},
  language     = {eng},
  number       = {4},
  pages        = {23--811},
  publisher    = {IOP Publishing},
  series       = {Journal of Radiological Protection},
  title        = {Derivation and application of dose reduction factors for protective eyewear worn in interventional radiology and cardiology},
  url          = {http://dx.doi.org/10.1088/0952-4746/34/4/811},
  doi          = {10.1088/0952-4746/34/4/811},
  volume       = {34},
  year         = {2014},
}