New Imaging Technology Set to Transform Skin Cancer Diagnosis

Researchers at the University of Arizona are developing innovative optical technology aimed at enhancing the diagnosis of skin cancers, which are the most common malignancy globally. This new approach employs a technique known as synthetic wavelength imaging (SWI), enabling deeper examination of biological tissues, including skin and soft tissue linings. The initiative is part of a broader effort funded by the National Institutes of Health’s (NIH) Common Fund Venture Program, which has allocated nearly $2.7 million for this groundbreaking research.

The project focuses specifically on nonmelanoma skin cancers, such as basal cell carcinoma and squamous cell carcinoma. According to principal investigator and project lead Florian Willomitzer, an associate professor of optical sciences, these cancers exhibit distinct imaging contrast properties compared to melanoma, posing unique challenges for developing advanced imaging technologies.

Traditional imaging techniques, such as confocal microscopy and optical coherence tomography, utilize optical light wavelengths within the visible to near-infrared spectrum. While these methods provide high contrast and resolution at shallow tissue depths, their shorter wavelengths are prone to scattering when penetrating deeper biological tissues. Conversely, longer wavelength methods like ultrasound can reach these depths but often lack the necessary resolution and contrast for effective cancer assessment.

The researchers aim to create a noninvasive imaging method that combines the benefits of depth penetration with high resolution and imaging contrast. This balance is crucial for accurately assessing tumor margins at the time of diagnosis and for monitoring treatment response effectively. Current technologies fall short in delivering this combination consistently, highlighting the need for advancements in imaging capabilities.

Enhancing Diagnostic Precision with Synthetic Wavelength Imaging

The SWI technique utilizes two distinct illumination wavelengths to computationally generate a synthetic wavelength that enhances light scattering resistance within tissues. This allows researchers to leverage the higher contrast information from the original wavelengths, facilitating more accurate imaging of tumors. Willomitzer emphasizes the potential of this method, stating, “Synthetic wavelength imaging’s resilience to scattering in deep tissue while preserving high tissue contrast at the optical carrier wavelengths is a rare combination.”

The research not only seeks to improve the detection of invasive lesions and the definition of tumor margins but also aims to enable real-time monitoring of treatment responses. Enhanced imaging techniques could lead to earlier detection of health conditions, more precise evaluations of cellular and tissue health, and advancements in non-invasive procedures that could reduce the need for surgery.

Furthermore, the experiments will focus on capturing rapid biological processes, such as muscle contractions and pulse, in real time. The ultimate goal is to produce highly detailed images revealing structures from individual cells to larger tissue features, which could significantly impact patient care.

The team anticipates that their advancements will facilitate the first clinical demonstration of synthetic wavelength imaging, addressing the critical need for effective assessment methods in nonmelanoma skin cancers. By achieving earlier detection and more accurate evaluations, the research holds promise for maximizing the efficacy of emerging therapeutic approaches in oncology.

Overall, the work being conducted at the University of Arizona represents a significant step forward in medical imaging technology, with the potential to transform how skin cancers are diagnosed and monitored, ultimately improving patient outcomes.