FORWARD-SCATTERED RADIATION FROM THE COMPRESSION PADDLE SHOULD BE CONSIDERED IN GLANDULAR DOSE ESTIMATIONS.
(2011) In Radiation Protection Dosimetry 147. p.196-201- Abstract
- From major protocols on dosimetry in mammography, there is no doubt that the incident air kerma should be evaluated without backscattered radiation to the dosemeter. However, forward-scattered radiation from the compression paddle is neglected. The aim of this work was to analyse the contribution of forward-scattered radiation for typical air kerma measurements. Measurements of forward-scatter were performed with a plane-parallel ionisation chamber on four mammography units. The forward-scatter contribution to the air kerma was 2-10 % and increased with the compression paddle thickness, but also with the half-value layer value. For incident air kerma in mammography, it can be as important to consider forward-scattered as backscattered... (More)
- From major protocols on dosimetry in mammography, there is no doubt that the incident air kerma should be evaluated without backscattered radiation to the dosemeter. However, forward-scattered radiation from the compression paddle is neglected. The aim of this work was to analyse the contribution of forward-scattered radiation for typical air kerma measurements. Measurements of forward-scatter were performed with a plane-parallel ionisation chamber on four mammography units. The forward-scatter contribution to the air kerma was 2-10 % and increased with the compression paddle thickness, but also with the half-value layer value. For incident air kerma in mammography, it can be as important to consider forward-scattered as backscattered radiation. If an ionisation chamber is used, the compression paddle should be in contact with the chamber; otherwise the air kerma and absorbed dose will be underestimated. If a dosemeter based on semiconductors with much less sensitivity to scattered radiation is used, it is suggested that a forward-scatter factor (FSF) is applied. Based on the results of this work, FSF=1.06 will lead to a maximum error of ∼4 %. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2058387
- author
- Hemdal, Bengt LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Radiation Protection Dosimetry
- volume
- 147
- pages
- 196 - 201
- publisher
- Oxford University Press
- external identifiers
-
- wos:000296355500047
- pmid:21778158
- scopus:81255166888
- pmid:21778158
- ISSN
- 1742-3406
- DOI
- 10.1093/rpd/ncr292
- language
- English
- LU publication?
- yes
- id
- 271cc4cd-0712-4664-920c-04f9d7f67d80 (old id 2058387)
- alternative location
- http://www.ncbi.nlm.nih.gov/pubmed/21778158?dopt=Abstract
- date added to LUP
- 2016-04-04 09:33:12
- date last changed
- 2022-01-29 18:27:06
@article{271cc4cd-0712-4664-920c-04f9d7f67d80, abstract = {{From major protocols on dosimetry in mammography, there is no doubt that the incident air kerma should be evaluated without backscattered radiation to the dosemeter. However, forward-scattered radiation from the compression paddle is neglected. The aim of this work was to analyse the contribution of forward-scattered radiation for typical air kerma measurements. Measurements of forward-scatter were performed with a plane-parallel ionisation chamber on four mammography units. The forward-scatter contribution to the air kerma was 2-10 % and increased with the compression paddle thickness, but also with the half-value layer value. For incident air kerma in mammography, it can be as important to consider forward-scattered as backscattered radiation. If an ionisation chamber is used, the compression paddle should be in contact with the chamber; otherwise the air kerma and absorbed dose will be underestimated. If a dosemeter based on semiconductors with much less sensitivity to scattered radiation is used, it is suggested that a forward-scatter factor (FSF) is applied. Based on the results of this work, FSF=1.06 will lead to a maximum error of ∼4 %.}}, author = {{Hemdal, Bengt}}, issn = {{1742-3406}}, language = {{eng}}, pages = {{196--201}}, publisher = {{Oxford University Press}}, series = {{Radiation Protection Dosimetry}}, title = {{FORWARD-SCATTERED RADIATION FROM THE COMPRESSION PADDLE SHOULD BE CONSIDERED IN GLANDULAR DOSE ESTIMATIONS.}}, url = {{http://dx.doi.org/10.1093/rpd/ncr292}}, doi = {{10.1093/rpd/ncr292}}, volume = {{147}}, year = {{2011}}, }