Partridge, T;
Massimi, L;
Wolfson, P;
Jiang, J;
Astolfo, A;
Suaris, T;
Havariyoun, G;
... Olivo, A; + view all
(2022)
Intra-Operative Assessment of Cancer with X-Ray Phase Contrast Computed Tomography.
In: Muller, B and Wang, G, (eds.)
Proceedings of SPIE: Developments in X-Ray Tomography XIV.
(pp. pp. 1-8).
Society of Photo-Optical Instrumentation Engineers (SPIE)
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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.
| Type: | Proceedings paper |
|---|---|
| Title: | Intra-Operative Assessment of Cancer with X-Ray Phase Contrast Computed Tomography |
| Event: | SPIE's Conference on Developments in X-Ray Tomography XIV |
| Location: | San Diego, CA, USA |
| Dates: | 22nd-24th August 2022 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2632294 |
| Publisher version: | https://doi.org/10.1117/12.2632294 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | Phase Contrast, Computed Tomography, Breast Conserving Surgery, Wide Local Excisions, Esophagus Tumor Staging |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10165256 |
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