Monochromatic breast computed tomography with synchrotron radiation: phase-contrast and phase-retrieved image comparison and full-volume reconstruction

Luca Brombal; Bruno Golosio; Fulvia Arfelli; Deborah Bonazza; Adriano Contillo; Pasquale Delogu; Sandro Donato; Giovanni Mettivier; Piernicola Oliva; Luigi Rigon; Angelo Taibi; Giuliana Tromba; Fabrizio Zanconati; Renata Longo

doi:10.1117/1.JMI.6.3.031402

27 November 2018 Monochromatic breast computed tomography with synchrotron radiation: phase-contrast and phase-retrieved image comparison and full-volume reconstruction

Luca Brombal, Bruno Golosio, Fulvia Arfelli, Deborah Bonazza, Adriano Contillo, Pasquale Delogu, Sandro Donato, Giovanni Mettivier, Piernicola Oliva, Luigi Rigon, Angelo Taibi, Giuliana Tromba, Fabrizio Zanconati, Renata Longo

Author Affiliations +

Journal of Medical Imaging, Vol. 6, Issue 3, 031402 (November 2018). https://doi.org/10.1117/1.JMI.6.3.031402

Abstract

A program devoted to performing the first in vivo synchrotron radiation (SR) breast computed tomography (BCT) is ongoing at the Elettra facility. Using the high spatial coherence of SR, phase-contrast (PhC) imaging techniques can be used. The latest high-resolution BCT acquisitions of breast specimens, obtained with the propagation-based PhC approach, are herein presented as part of the SYRMA-3D collaboration effort toward the clinical exam. Images are acquired with a 60-μm pixel dead-time-free single-photon-counting CdTe detector. The samples are imaged at 32 and 38 keV in a continuous rotating mode, delivering 5 to 20 mGy of mean glandular dose. Contrast-to-noise ratio (CNR) and spatial resolution performances are evaluated for both PhC and phase-retrieved images, showing that by applying the phase-retrieval algorithm a five-time CNR increase can be obtained with a minor loss in spatial resolution across soft tissue interfaces. It is shown that, despite having a poorer CNR, PhC images can provide a sharper visualization of microcalcifications, thus being complementary to phase-retrieved images. Furthermore, the first full-volume scan of a mastectomy sample (9 × 9 × 3 cm³) is reported. This investigation into surgical specimens indicates that SR BCT in terms of CNR, spatial resolution, scan duration, and scan volume is feasible.

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Luca Brombal, Bruno Golosio, Fulvia Arfelli, Deborah Bonazza, Adriano Contillo, Pasquale Delogu, Sandro Donato, Giovanni Mettivier, Piernicola Oliva, Luigi Rigon, Angelo Taibi, Giuliana Tromba, Fabrizio Zanconati, and Renata Longo "Monochromatic breast computed tomography with synchrotron radiation: phase-contrast and phase-retrieved image comparison and full-volume reconstruction," Journal of Medical Imaging 6(3), 031402 (27 November 2018). https://doi.org/10.1117/1.JMI.6.3.031402

Received: 16 March 2018; Accepted: 18 July 2018; Published: 27 November 2018

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