In a groundbreaking advancement poised to transform oncological surgeries, researchers at the University of Illinois at Urbana-Champaign have engineered a compact, multifunctional imaging system capable of simultaneously capturing ultraviolet (UV), visible, and near-infrared (NIR) images on a single chip. This innovative technology draws inspiration from the unique visual system of the mantis shrimp, whose eyes naturally separate and process multiple wavelengths of light with incredible precision. The newly developed camera holds immense promise for enhancing intraoperative cancer detection, enabling surgeons to identify and assess lymph nodes with unprecedented accuracy and real-time feedback.
Lymph nodes serve a critical role in the body’s immune defense, acting as filters that trap viruses, bacteria, and aberrant cells such as metastatic cancer cells. During breast cancer surgery, the decision to biopsy, preserve, or remove lymph nodes hinges on the surgeon’s ability to evaluate whether these nodes harbor cancer. Traditionally, this evaluation is complex and uncertain, often leading to unnecessary removal of unaffected nodes or incomplete cancer excision, both of which contribute to post-operative complications including lymphedema. The newly designed imaging device targets this unmet need by providing detailed biochemical and anatomical information during the surgical procedure.
Conventional methods for lymph node detection, such as near-infrared imaging with indocyanine green (ICG) dyes, reveal the location of lymph nodes but fail to disclose metastasis status intraoperatively. In contrast, biochemical contrast methods can identify cancerous activity but are usually not integrated with lymph node localization tools and suffer from limited spatial co-registration. The exceptional feature of the mantis shrimp’s vision—its ability to segment light into distinct wavelengths within a compact structure—offered an elegant blueprint to overcome these challenges by achieving simultaneous multispectral imaging with inherent pixel-level registration on the new camera chip.
The camera’s architecture integrates stacked photodetector layers with pixel-level spectral filters that selectively capture UV, visible, and NIR light on the same sensor array. This innovative design eliminates the cumbersome need for multiple separate sensors or optical pathways, allowing for precise alignment of images across all spectral bands. Complementing the sensor, the device employs advanced mirror-based optics to maintain optimal focus and minimize chromatic aberrations across the ultraviolet to near-infrared spectrum. Advanced image reconstruction software further refines the raw multispectral data into clear, spatially accurate images crucial for surgical decision-making.
The system exploits the near-infrared channel to detect ICG fluorescence, a clinically established indicator that highlights lymphatic drainage pathways and node locations. Once a lymph node is localized using this modality, UV-induced autofluorescence imaging is applied without exogenous labels to probe the biochemical environment of the node tissue. This fluorescence arises from endogenous fluorophores such as tryptophan, whose spectral signatures alter in the presence of metastasis. By harnessing this label-free UV fluorescence signature, the camera helps differentiate between benign and malignant nodes in real-time, guiding surgeons toward a more targeted and conservative excision strategy.
Extensive validation of the device has been conducted, beginning with laboratory tests to verify its sensitivity and spectral discrimination capabilities across ultraviolet, visible, and near-infrared domains. Subsequent experiments involved imaging cancer cell cultures and freshly excised human breast cancer tissues. In these trials involving 94 lymph nodes from 33 patients, the UV channel’s label-free fluorescence diagnostic achieved a remarkable 97% sensitivity and 89% specificity in detecting metastatic involvement, while near-infrared imaging reliably located the lymph nodes. These promising results underscore the camera’s potential as an adjunctive tool rather than a replacement for pathological examination.
The real-time integration of multispectral imaging during surgery represents a significant leap forward in precision oncology. By fusing anatomical context from visible light imaging with functional lymphatic mapping in the near-infrared and biochemical cancer detection in the ultraviolet range, the surgeon receives comprehensive spatial and pathological information. This multispectral approach not only improves the accuracy of lymph node assessment but also minimizes the risk of both overtreatment and incomplete tumor clearance, potentially reducing the incidence of second surgeries and postoperative complications.
Looking ahead, the research team aims to refine the camera system for routine clinical use in operating rooms. Key objectives include enhancing the ultraviolet sensitivity and imaging speed, developing robust real-time image processing algorithms, and creating a sterile, ergonomically practical device suitable for surgical workflows. Large-scale clinical trials involving diverse patient populations will be crucial to validate the device’s efficacy across various cancer types where lymph node metastasis dictates prognosis and treatment strategy. Additionally, investigations into differential diagnosis, including distinguishing cancer from inflammation or fibrosis, are underway to improve specificity.
The bioinspired imaging strategy exemplifies the power of cross-disciplinary innovation, where insights from evolutionary biology directly inform cutting-edge biomedical device design. Borrowing from the mantis shrimp’s photoreceptor stacking mechanism has enabled a compact, multifunctional camera that unites the strengths of multiple imaging modalities into a single, efficient system. Such integrated technologies herald a new era in surgical precision, promising not only to transform cancer surgeries but also to impact pathology assessments and diagnostics more broadly.
This research embodies a paradigm shift in label-free optical imaging by facilitating instantaneous, multiplexed spectral acquisition with submillimeter spatial resolution. Beyond breast cancer, this technology’s capabilities could extend to other malignancies and surgical interventions demanding rapid, in-depth tissue characterization without reliance on external contrast agents. The advent of such devices highlights the synergy between photonics, materials science, and clinical medicine in creating tools that enhance human health through innovative sensing modalities.
The work, published in the journal Optica, stands as a testament to the fusion of optical engineering and clinical application, promising to make significant strides in oncologic surgery outcomes. As the device matures towards clinical deployment, surgeons and patients alike stand to benefit from improved precision, reduced operative time, and minimized postoperative complications — ultimately contributing to enhanced quality of life and survival rates for cancer patients worldwide.
Subject of Research: Bioinspired Multispectral Imaging for Cancer Surgery
Article Title: Bioinspired Ultraviolet–to–Near-Infrared Imager for Label-Free Intraoperative Assessment of Lymph Node Metastasis
Web References: https://opg.optica.org/optica/abstract.cfm?doi=10.1364/OPTICA.582293
References: Y. Jin et al., “Bioinspired Ultraviolet–to–Near-Infrared Imager for Label-Free Intraoperative Assessment of Lymph Node Metastasis,” Optica, vol. 13, 2026. DOI 10.1364/OPTICA.582293
Image Credits: Viktor Gruev, University of Illinois at Urbana-Champaign
Keywords: Cancer research, Imaging, Cameras, Optical devices, Ultraviolet imaging, Near-infrared imaging, Biomedical optics, Lymph node assessment, Label-free fluorescence, Surgical oncology
