Optimization of operating conditions in photon-counting multi-slit mammography based on Si-strip detectors

Magnus Åslund; Björn Cederström; Mats Lundqvist; Mats Danielsson

doi:10.1117/12.652728

2 March 2006 Optimization of operating conditions in photon-counting multi-slit mammography based on Si-strip detectors

Magnus Åslund, Björn Cederström, Mats Lundqvist, Mats Danielsson

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 61420A (2006) https://doi.org/10.1117/12.652728
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Measurements and simulations of the signal-difference-to-noise ratio (SDNR) and average glandular dose (AGD) have been performed on a photon counting full-field digital mammography system to determine the optimal operating conditions. Several beam qualities were experimentally evaluated by using different combinations of tube voltage, added filters and thickness of BR12 with a tungsten target x-ray tube. The SDNR and AGD were also calculated theoretically for an extended number of operating conditions and a more accurate breast model. As figure of merit for each operating condition, a spectral quantum efficiency (SQE) was calculated as the polychromatic SDNR squared over the optimal monochromatic SDNR squared at the same AGD. The theoretical model agreed within ±4% relative the measured SDNR throughout the evaluated breast thickness (30-70 mm) and tube voltage range (26-38 kV). The optimization was performed with a constant SDNR-rate as compared to using a fixed filter thickness. The optimal combinations of tube voltage-filter material were: 32 kV-Ag, 34 kV-Cd, 36 kV-Sn for a breast thickness of 30, 50 and 70 mm respectively. These K-edge filter materials increased the SQE by less than 4% compared to the optimal Al filtration.

Citation Download Citation

Magnus Åslund, Björn Cederström, Mats Lundqvist, and Mats Danielsson "Optimization of operating conditions in photon-counting multi-slit mammography based on Si-strip detectors", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61420A (2 March 2006); https://doi.org/10.1117/12.652728

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available