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A new test method to assess the representation of spiculated mass like targets in digital mammography and breast tomosynthesis
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Paper Abstract

In this work we tested different materials for 3D printing of spiculated mass models for their incorporation into an existing 3D structured phantom for performance testing of FFDM and DBT. Counting the number of spicules as a function of dose was then evaluated as a possible extra test feature expressing conspicuity next to detectability. Seven printable materials were exposed together with a PMMA step wedge and material samples with known linear attenuation coefficient to determine PMMA equivalent thickness and linear attenuation coefficient, respectively. Next, two models of spiculated masses were created each with a different complexity in terms of number of spicules. The visibility of the number of spicules of a 3D printed spiculated mass model loosely placed in the phantom or embedded into two different printing materials was assessed for FFDM and DBT. Vero White pure was chosen as the most appropriate material for the printing of masses whereas Vero Clear and Tango+ were chosen as background materials. The visibility of spicules was best in the loose mass models and better in the background material Tango+ compared to Vero Clear. While the discrimination of the different spicules could be assessed in FFDM and DBT, as expected only a limited dose sensitivity was found for the visibility of spicules evaluated for the different background materials and at different beam energies.

Paper Details

Date Published: 1 March 2019
PDF: 8 pages
Proc. SPIE 10948, Medical Imaging 2019: Physics of Medical Imaging, 109483Y (1 March 2019); doi: 10.1117/12.2513464
Show Author Affiliations
Elisabeth Salomon, Medizinische Univ. Wien (Austria)
Friedrich Semturs, Medizinische Univ. Wien (Austria)
Lesley Cockmartin, UZ Gasthuisberg (Belgium)
Michael Figl, Medizinische Univ. Wien (Austria)
Hilde Bosmans, UZ Gasthuisberg (Belgium)
Johann Hummel, Medizinische Univ. Wien (Austria)


Published in SPIE Proceedings Vol. 10948:
Medical Imaging 2019: Physics of Medical Imaging
Taly Gilat Schmidt; Guang-Hong Chen; Hilde Bosmans, Editor(s)

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