Sophia Zackrisson
Manager
Dose evaluation of simultaneous breast radiography and mechanical imaging
Author
Editor
- Lifeng Yu
- Rebecca Fahrig
- John M. Sabol
Summary, in English
This study investigates the impact in terms of radiation dose when performing simultaneous digital breast tomosynthesis
(DBT) and mechanical imaging (MI) – DBTMI. DBTMI has demonstrated the potential to increase specificity of cancer
detection, and reduce unnecessary biopsies, as compared to digital mammography (DM) screening. The presence of the
MI sensor during simultaneous image acquisition may increase the radiation dose when automatic exposure control is used.
In this project, a radiation dose study was conducted on clinically available breast imaging systems with and without the
MI sensor. We have investigated three approaches to analyse the dose increase in DBTMI, using (i) the estimates of average
glandular dose (AGD) reported in DICOM headers of radiography images; (ii) AGD measured by a conventional
dosemeter; and (iii) AGD measured by optically stimulated luminescence using NaCl pellets. The relative increase in AGD
estimated from DICOM headers when using the MI sensor was on average 10.7% and 12.4%, for DM and DBT
measurements, respectively. The relative increase in AGD using the conventional dosemeter was 11.2% in DM mode and
12.2% in DBT mode. The relative increase in AGD using NaCl pellets was 14.6% in DM mode. Our measurements suggest
that the use of simultaneous breast radiography and MI increases the AGD by 13% on average. The increase in dose is still
below the acceptable values in mammography screening recommended by the European Guidelines.
(DBT) and mechanical imaging (MI) – DBTMI. DBTMI has demonstrated the potential to increase specificity of cancer
detection, and reduce unnecessary biopsies, as compared to digital mammography (DM) screening. The presence of the
MI sensor during simultaneous image acquisition may increase the radiation dose when automatic exposure control is used.
In this project, a radiation dose study was conducted on clinically available breast imaging systems with and without the
MI sensor. We have investigated three approaches to analyse the dose increase in DBTMI, using (i) the estimates of average
glandular dose (AGD) reported in DICOM headers of radiography images; (ii) AGD measured by a conventional
dosemeter; and (iii) AGD measured by optically stimulated luminescence using NaCl pellets. The relative increase in AGD
estimated from DICOM headers when using the MI sensor was on average 10.7% and 12.4%, for DM and DBT
measurements, respectively. The relative increase in AGD using the conventional dosemeter was 11.2% in DM mode and
12.2% in DBT mode. The relative increase in AGD using NaCl pellets was 14.6% in DM mode. Our measurements suggest
that the use of simultaneous breast radiography and MI increases the AGD by 13% on average. The increase in dose is still
below the acceptable values in mammography screening recommended by the European Guidelines.
Department/s
- LUCC: Lund University Cancer Centre
- Medical Radiation Physics, Malmö
- Radiology Diagnostics, Malmö
- LU Profile Area: Light and Materials
- LTH Profile Area: Photon Science and Technology
- EpiHealth: Epidemiology for Health
Publishing year
2023-04-28
Language
English
Publication/Series
Medical Imaging 2023 : Physics of Medical Imaging
Volume
12463
Document type
Conference paper
Publisher
SPIE
Topic
- Radiology, Nuclear Medicine and Medical Imaging
Keywords
- Digital breast tomosynthesis
- Mechanical imaging
- DBTMI
- radiation dose measurement
- OSL
- NaCl pellets
Conference name
SPIE Medical Imaging 2023
Conference date
2023-02-19 - 2023-02-23
Status
Published
Project
- AI together with MI in mammography and breast tomosynthesis
- Simultaneous Digital Breast Tomosynthesis and Mechanical Imaging
Research group
- Medical Radiation Physics, Malmö
- Radiology Diagnostics, Malmö