Geometric calibration for a next-generation digital breast tomosynthesis system

William S. Ferris; Trevor L. Vent; Tristan D. Maidment; Raymond J. Acciavatti; David E. Wurtele; Andrew D. A. Maidment

doi:10.1117/12.2255301

9 March 2017 Geometric calibration for a next-generation digital breast tomosynthesis system

William S. Ferris, Trevor L. Vent, Tristan D. Maidment, Raymond J. Acciavatti, David E. Wurtele, Andrew D. A. Maidment

Proceedings Volume 10132, Medical Imaging 2017: Physics of Medical Imaging; 101324C (2017) https://doi.org/10.1117/12.2255301
Event: SPIE Medical Imaging, 2017, Orlando, Florida, United States

Abstract

A method for geometric calibration of a next-generation tomosynthesis (NGT) system is proposed and tested. The NGT system incorporates additional geometric movements between projections over conventional DBT. These movements require precise geometric calibration to support magnification DBT and isotropic SR. A phantom was created to project small tungsten-carbide ball bearings (BB’s) onto the detector at four different magnifications. Using a bandpass filter and template matching, a MATLAB program was written to identify the centroid locations of each BB projection on the images. An optimization algorithm calculated an effective location for the source and detector that mathematically projected the BB’s onto the same locations on the detector as found on the projection images. The average distance between the BB projections on the image and the mathematically computed projections was 0.11 mm. The effective locations for the source and detector were encoded in the DICOM file for each projection; these were then used by the reconstruction algorithm. Tomographic image reconstructions were performed for three acquisition modes of the NGT system; these successfully demonstrated isotropic SR, magnified SR, and oblique reconstruction.

Citation Download Citation

William S. Ferris, Trevor L. Vent, Tristan D. Maidment, Raymond J. Acciavatti, David E. Wurtele, and Andrew D. A. Maidment "Geometric calibration for a next-generation digital breast tomosynthesis system", Proc. SPIE 10132, Medical Imaging 2017: Physics of Medical Imaging, 101324C (9 March 2017); https://doi.org/10.1117/12.2255301

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