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Portrait of Anders Tingberg. Photo

Anders Tingberg

Associate professor

Portrait of Anders Tingberg. Photo

In-plane artifacts in breast tomosynthesis quantified with a novel contrast-detail phantom

Author

  • Tony Svahn
  • Mark Ruschin
  • Bengt Hemdal
  • Lars Nyhlen
  • Ingvar Andersson
  • Pontus Timberg
  • Sören Mattsson
  • Anders Tingberg

Summary, in English

The purpose of this work was to develop a contrast-detail phantom that can be used to evaluate image quality in breast tomosynthesis (BT) and as a first step use it to evaluate in-plane artifacts with respect to object size and contrast. The phantom was constructed using a Polylite [registered trademark] resin as bulk material, as it has x-ray mass attenuation properties similar to polymethyl methacrylate (PMMA), a common phantom material in mammography. Six different materials polyoxymethylene (POM), bakelite [registered trademark] , nylon, polycarbonate (PC), acrylonitrilebutadienestyrene (ABS) and polyethene (PE) - were selected to form the phantom details. For each of the six materials, five spherical objects were manufactured (diameters of 4, 8, 12, 16, and 20 mm) resulting in 30 objects that were embedded with their centres approximately aligned at the central plane of a 26 mm thick Polylite [registered trademark] block (210 mm × 300 mm). A 20 mm thick PMMA block was added to yield a phantom with attenuation properties similar to 45 mm PMMA that could simulate a so-called standard breast (50 mm thick, 50% glandular tissue). Images of the phantom were acquired using a BT prototype system that employs filtered backprojection for image reconstruction. The magnitude of the in-plane artifacts was evaluated and was found to increase linearly with increasing contrast (signal) level and size of the embedded objects. The contrast-detail phantom was found to be a useful tool for evaluating BT in-plane artifacts and might also be used to study out-of-plane artifacts and the effect of different acquisition and reconstruction parameters on image quality in BT.

Department/s

  • Medical Radiation Physics, Malmö
  • Department of Translational Medicine

Publishing year

2007

Language

English

Pages

1853-1864

Publication/Series

Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Volume

6510

Issue

PART 3

Document type

Conference paper

Publisher

SPIE

Topic

  • Radiology, Nuclear Medicine and Medical Imaging

Keywords

  • Digital mammography
  • Breast tomosynthesis
  • 3D phantom

Conference name

Medical Imaging 2007: Physics of Medical Imaging

Conference date

2007-02-18 - 2007-02-22

Conference place

San Diego, CA, United States

Status

Published

Research group

  • Medical Radiation Physics, Malmö

ISBN/ISSN/Other

  • ISSN: 1042-4687
  • ISSN: 1605-7422