Intra-operative assessment of cancer with x-ray phase contrast computed tomography

T. Partridge; L. Massimi; P. Wolfson; J. Jiang; A. Astolfo; T. Suaris; G. Havariyoun; S. Savvidis; C. J. Maughan Jones; N. Djurabekova; P. M. Sam Hawker; B. Smit; O. J. Larkin; E. Millard; W. Shorrock; R. M. Waltham; K. M. A. Ho; H. Mc Bain; A. Wilson; A. Peel; Z. Shah; R. L. Nelan; H. Delaney; A. Liyadipita; A. P. Lavine; K. Dawas; B. Mohammadi; Y A. Qureshi; M. D. Chouhan; S. A. Taylor; M. Mughal; M. Endrizzi; C. K. Hagen; P. R. T. Munro; S. W. Duffy; J. L. Jones; M. Novelli; L. B. Lovat; I. G. Haig; D. Bate; A. Olivo

doi:10.1117/12.2632294

14 October 2022 Intra-operative assessment of cancer with x-ray phase contrast computed tomography

T. Partridge, L. Massimi, P. Wolfson, J. Jiang, A. Astolfo, T. Suaris, G. Havariyoun, S. Savvidis, C. J. Maughan Jones, N. Djurabekova, P. M. Sam Hawker, B. Smit, O. J. Larkin, E. Millard, W. Shorrock, R. M. Waltham, K. M. A. Ho, H. Mc Bain, A. Wilson, A. Peel, Z. Shah, R. L. Nelan, H. Delaney, A. Liyadipita, A. P. Lavine, K. Dawas, B. Mohammadi, Y A. Qureshi, M. D. Chouhan, S. A. Taylor, M. Mughal, M. Endrizzi, C. K. Hagen, P. R. T. Munro, S. W. Duffy, J. L. Jones, M. Novelli, L. B. Lovat, I. G. Haig, D. Bate, A. Olivo

Author Affiliations +

Proceedings Volume 12242, Developments in X-Ray Tomography XIV; 122421C (2022) https://doi.org/10.1117/12.2632294
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

X-ray Phase-Contrast Computed Tomography (PC-CT) increases contrast in weakly attenuating samples, such as soft tissues. In Edge-Illumination (EI) PC-CT, phase effects are accessed from amplitude modulation of the x-ray beam using alternating transmitting and attenuating masks placed prior to the sample and detector. A large field of view PC-CT scanner using this technique was applied to two areas of cancer assessment, namely excised breast and esophageal tissue. For the breast tissue, Wide Local Excisions (WLEs) were studied intra-operatively using PC-CT for the evaluation of tumor removal in breast conservation surgery. Images were acquired in 10 minutes without compromising on image quality, showing this can be used in a clinical setting. Longer, higher resolution PC-CT images were also taken, with analysis showing previously undetected thinning of tumor strands. This would allow a second use of the system for “virtual histopathology”, outside of surgery. For the esophagus samples, tissues were taken from esophagectomy surgery, where the lower part of the esophagus is removed, and the stomach relocated. For the assessment of ongoing therapy, accurate staging of tumors in the removed esophagus is essential, with the current gold standard provided by histopathology. PCCT images were acquired on several samples and compare well with histopathology, with both modalities showing similar features. Examples are shown where staging of tumor penetration is possible with PC-CT images alone, which is hoped will be an important step in performing the imaging and staging intra-operatively.

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T. Partridge, L. Massimi, P. Wolfson, J. Jiang, A. Astolfo, T. Suaris, G. Havariyoun, S. Savvidis, C. J. Maughan Jones, N. Djurabekova, P. M. Sam Hawker, B. Smit, O. J. Larkin, E. Millard, W. Shorrock, R. M. Waltham, K. M. A. Ho, H. Mc Bain, A. Wilson, A. Peel, Z. Shah, R. L. Nelan, H. Delaney, A. Liyadipita, A. P. Lavine, K. Dawas, B. Mohammadi, Y A. Qureshi, M. D. Chouhan, S. A. Taylor, M. Mughal, M. Endrizzi, C. K. Hagen, P. R. T. Munro, S. W. Duffy, J. L. Jones, M. Novelli, L. B. Lovat, I. G. Haig, D. Bate, and A. Olivo "Intra-operative assessment of cancer with x-ray phase contrast computed tomography", Proc. SPIE 12242, Developments in X-Ray Tomography XIV, 122421C (14 October 2022); https://doi.org/10.1117/12.2632294

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