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MacCormac O, Noonan P, Janatka M, Horgan CC, Bahl A, Qiu J, Elliot M, Trotouin T, Jacobs J, Patel S, Bergholt MS, Ashkan K, Ourselin S, Ebner M, Vercauteren T, Shapey J. Lightfield hyperspectral imaging in neuro-oncology surgery: an IDEAL 0 and 1 study. Front Neurosci 2023; 17:1239764. [PMID: 37790587 PMCID: PMC10544348 DOI: 10.3389/fnins.2023.1239764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/31/2023] [Indexed: 10/05/2023] Open
Abstract
Introduction Hyperspectral imaging (HSI) has shown promise in the field of intra-operative imaging and tissue differentiation as it carries the capability to provide real-time information invisible to the naked eye whilst remaining label free. Previous iterations of intra-operative HSI systems have shown limitations, either due to carrying a large footprint limiting ease of use within the confines of a neurosurgical theater environment, having a slow image acquisition time, or by compromising spatial/spectral resolution in favor of improvements to the surgical workflow. Lightfield hyperspectral imaging is a novel technique that has the potential to facilitate video rate image acquisition whilst maintaining a high spectral resolution. Our pre-clinical and first-in-human studies (IDEAL 0 and 1, respectively) demonstrate the necessary steps leading to the first in-vivo use of a real-time lightfield hyperspectral system in neuro-oncology surgery. Methods A lightfield hyperspectral camera (Cubert Ultris ×50) was integrated in a bespoke imaging system setup so that it could be safely adopted into the open neurosurgical workflow whilst maintaining sterility. Our system allowed the surgeon to capture in-vivo hyperspectral data (155 bands, 350-1,000 nm) at 1.5 Hz. Following successful implementation in a pre-clinical setup (IDEAL 0), our system was evaluated during brain tumor surgery in a single patient to remove a posterior fossa meningioma (IDEAL 1). Feedback from the theater team was analyzed and incorporated in a follow-up design aimed at implementing an IDEAL 2a study. Results Focusing on our IDEAL 1 study results, hyperspectral information was acquired from the cerebellum and associated meningioma with minimal disruption to the neurosurgical workflow. To the best of our knowledge, this is the first demonstration of HSI acquisition with 100+ spectral bands at a frame rate over 1Hz in surgery. Discussion This work demonstrated that a lightfield hyperspectral imaging system not only meets the design criteria and specifications outlined in an IDEAL-0 (pre-clinical) study, but also that it can translate into clinical practice as illustrated by a successful first in human study (IDEAL 1). This opens doors for further development and optimisation, given the increasing evidence that hyperspectral imaging can provide live, wide-field, and label-free intra-operative imaging and tissue differentiation.
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Affiliation(s)
- Oscar MacCormac
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
- Department of Neurosurgery, King's College Hospital, London, United Kingdom
| | - Philip Noonan
- Hypervision Surgical Limited, London, United Kingdom
| | - Mirek Janatka
- Hypervision Surgical Limited, London, United Kingdom
| | | | - Anisha Bahl
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
| | - Jianrong Qiu
- School of Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Matthew Elliot
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
- Department of Neurosurgery, King's College Hospital, London, United Kingdom
| | - Théo Trotouin
- Hypervision Surgical Limited, London, United Kingdom
| | - Jaco Jacobs
- Hypervision Surgical Limited, London, United Kingdom
| | - Sabina Patel
- Department of Neurosurgery, King's College Hospital, London, United Kingdom
| | - Mads S. Bergholt
- School of Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Keyoumars Ashkan
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
- Department of Neurosurgery, King's College Hospital, London, United Kingdom
| | - Sebastien Ourselin
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
- Hypervision Surgical Limited, London, United Kingdom
| | - Michael Ebner
- Hypervision Surgical Limited, London, United Kingdom
| | - Tom Vercauteren
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
- Hypervision Surgical Limited, London, United Kingdom
| | - Jonathan Shapey
- School of Biomedical Engineering and Imaging Science, King's College London, London, United Kingdom
- Department of Neurosurgery, King's College Hospital, London, United Kingdom
- Hypervision Surgical Limited, London, United Kingdom
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Wu Y, Xu Z, Yang W, Ning Z, Dong H. Review on the Application of Hyperspectral Imaging Technology of the Exposed Cortex in Cerebral Surgery. Front Bioeng Biotechnol 2022; 10:906728. [PMID: 35711634 PMCID: PMC9196632 DOI: 10.3389/fbioe.2022.906728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
The study of brain science is vital to human health. The application of hyperspectral imaging in biomedical fields has grown dramatically in recent years due to their unique optical imaging method and multidimensional information acquisition. Hyperspectral imaging technology can acquire two-dimensional spatial information and one-dimensional spectral information of biological samples simultaneously, covering the ultraviolet, visible and infrared spectral ranges with high spectral resolution, which can provide diagnostic information about the physiological, morphological and biochemical components of tissues and organs. This technology also presents finer spectral features for brain imaging studies, and further provides more auxiliary information for cerebral disease research. This paper reviews the recent advance of hyperspectral imaging in cerebral diagnosis. Firstly, the experimental setup, image acquisition and pre-processing, and analysis methods of hyperspectral technology were introduced. Secondly, the latest research progress and applications of hyperspectral imaging in brain tissue metabolism, hemodynamics, and brain cancer diagnosis in recent years were summarized briefly. Finally, the limitations of the application of hyperspectral imaging in cerebral disease diagnosis field were analyzed, and the future development direction was proposed.
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Affiliation(s)
- Yue Wu
- Research Center for Intelligent Sensing Systems, Zhejiang Lab, Hangzhou, China
| | - Zhongyuan Xu
- Research Center for Intelligent Sensing Systems, Zhejiang Lab, Hangzhou, China
| | - Wenjian Yang
- Research Center for Intelligent Sensing Systems, Zhejiang Lab, Hangzhou, China
| | - Zhiqiang Ning
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (CAS), Hefei, China.,Science Island Branch, Graduate School of USTC, Hefei, China
| | - Hao Dong
- Research Center for Sensing Materials and Devices, Zhejiang Lab, Hangzhou, China
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van Manen L, Birkhoff WAJ, Eggermont J, Hoveling RJM, Nicklin P, Burggraaf J, Wilson R, Mieog JSD, Robinson DJ, Vahrmeijer AL, Bradbury MS, Dijkstra J. Detection of cutaneous oxygen saturation using a novel snapshot hyperspectral camera: a feasibility study. Quant Imaging Med Surg 2021; 11:3966-3977. [PMID: 34476182 DOI: 10.21037/qims-21-46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/15/2021] [Indexed: 11/06/2022]
Abstract
Background Tissue necrosis, a consequence of inadequate tissue oxygenation, is a common post-operative complication. As current surgical assessments are often limited to visual and tactile feedback, additional techniques that can aid in the interrogation of tissue viability are needed to improve patient outcomes. In this bi-institutional pilot study, the performance of a novel snapshot hyperspectral imaging camera to detect superficial cutaneous oxygen saturation (StO2) was evaluated. Methods Healthy human volunteers were recruited at two participating centers. Cutaneous StO2 of the forearm was determined by a snapshot hyperspectral camera on two separate study days during occlusion-reperfusion of the brachial artery and after induction of local vasodilation. To calculate the blood StO2 at each pixel in the multispectral image, spectra were selected, and fitting was performed over wavelengths ranging from 470 to 950 nm. Results Quantitative detection of physiological changes in cutaneous StO2 levels was feasible in all sixteen volunteers. A significant (P<0.001) decrease in cutaneous StO2 levels from 78.3% (SD: 15.3) at baseline to 60.6% (SD: 19.8) at the end of occlusion phase was observed, although StO2 levels returned to baseline after five minutes. Mean cutaneous StO2 values were similar in the same subjects on separate study days (Pearson R2: 0.92 and 0.77, respectively) at both centers. Local vasodilation did not yield significant changes in cutaneous StO2 values. Conclusions This pilot study demonstrated the feasibility of a snapshot hyperspectral camera for detecting quantitative physiological changes in cutaneous StO2 in normal human volunteers, and serves as a precursor for further validation in perioperative studies.
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Affiliation(s)
- Labrinus van Manen
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Jeroen Eggermont
- Leiden University Medical Center, Division of Image Processing, Department of Radiology, Leiden, The Netherlands
| | | | - Philip Nicklin
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jacobus Burggraaf
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands.,Centre for Human Drug Research, Leiden, The Netherlands
| | - Roger Wilson
- Department of Anesthesiology, Critical Care Medicine, and Surgery, Memorial Sloan Kettering Cancer Center Research, New York, NY, USA
| | - J Sven D Mieog
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Dominic J Robinson
- Erasmus Medical Center, Center for Optical Diagnostics and Therapy, Department of Otorhinolaryngology and Head and Neck Surgery, Rotterdam, The Netherlands
| | | | - Michelle S Bradbury
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,MSK-Cornell Center for Translation of Cancer Nanomedicines, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Molecular Pharmacology Program, Sloan Kettering Institute for Cancer Research, New York, NY, USA
| | - Jouke Dijkstra
- Leiden University Medical Center, Division of Image Processing, Department of Radiology, Leiden, The Netherlands
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Optimal Spectral Combination of a Hyperspectral Camera for Intraoperative Hemodynamic and Metabolic Brain Mapping. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10155158] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Intraoperative optical imaging is a localization technique for the functional areas of the human brain cortex during neurosurgical procedures. These areas are assessed by monitoring the oxygenated (HbO2) and deoxygenated hemoglobin (Hb) concentration changes occurring in the brain. Sometimes, the functional status of the brain is assessed using metabolic biomarkers: the oxidative state of cytochrome-c-oxidase (oxCCO). A setup composed of a white light source and a hyperspectral or a standard RGB camera could be used to identify the functional areas. The choice of the best spectral configuration is still based on an empirical approach. We propose in this study a method to define the optimal spectral combinations of a commercial hyperspectral camera for the computation of hemodynamic and metabolic brain maps. The method is based on a Monte Carlo framework that simulates the acquisition of the intrinsic optical signal following a neuronal activation. The results indicate that the optimal spectral combination of a hyperspectral camera aims to accurately quantify the HbO2 (0.5% error), Hb (4.4% error), and oxCCO (15% error) responses in the brain following neuronal activation. We also show that RGB imaging is a low cost and accurate solution to compute Hb maps (4% error), but not accurate to compute HbO2 (48% error) or oxCCO (1036% error) maps.
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