Skip Navigation

Radiation Protection Dosimetry 2005 114(1-3):436-443; doi:10.1093/rpd/nch556
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (2)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Hemdal, B.
Right arrow Articles by Olsson, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hemdal, B.
Right arrow Articles by Olsson, M.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Average glandular dose in routine mammography screening using a Sectra MicroDose Mammography unit

Bengt Hemdal1,*, Lars Herrnsdorf2, Ingvar Andersson3, Gert Bengtsson4, Boel Heddson5 and Magnus Olsson5

1 Department of Medical Radiation Physics, Lund University, Malmö University Hospital, SE-205 02 Malmö, Sweden
2 RTI Electronics AB, SE-431 37 Mölndal, Sweden
3 Department of Diagnostic Radiology, Malmö University Hospital, SE-205 02 Malmö, Sweden
4 Department of Diagnostic Radiology, Lund University Hospital, SE-221 85 Lund, Sweden
5 Department of Diagnostic Radiology, Hospital of Helsingborg, SE-251 87 Helsingborg, Sweden

* Corresponding author: bengt.hemdal{at}rfa.mas.lu.se

The Sectra MicroDose Mammography system is based on direct photon counting (with a solid-state detector), and a substantially lower dose to the breast than when using conventional systems can be expected. In this work absorbed dose measurements have been performed for the first unit used in routine mammography screening (at the Hospital of Helsingborg, Sweden). Two European protocols on dosimetry in mammography have been followed. Measurement of half value layer (HVL) cannot be performed as prescribed, but this study has demonstrated that non-invasive measurements of HVL can be performed accurately with a sensitive and well collimated solid-state detector with simultaneous correction for the energy dependence. The average glandular dose for a 50 mm standard breast with 50% glandularity, simulated by 45 mm polymethylmethacrylate, was found to be 0.21 and 0.28 mGy in March and December 2004, respectively. These values are much lower than for any other mammography system on the market today. It has to be stressed that the measurements were made using the current clinical settings and that no systematic optimisation of the relationship between absorbed dose and diagnostic image quality has been performed within the present study. In order to further increase the accuracy of absorbed dose measurements for this unit, the existing dose protocols should be revised to account also for the tungsten/aluminium anode/filter combination, the multi-slit pre-collimator device and the occurrence of a dose profile in the scanning direction.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 RadiologyHome page
S. Suryanarayanan, A. Karellas, S. Vedantham, I. Sechopoulos, and C. J. D'Orsi
Detection of Simulated Microcalcifications in a Phantom with Digital Mammography: Effect of Pixel Size
Radiology, July 1, 2007; 244(1): 130 - 137.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.