Surgical excision followed by histopathological examination is the gold standard for the diagnosis and staging of melanoma. Reoperations and unnecessary removal of healthy tissue could be reduced if non-invasive imaging techniques were available for presurgical tumor delineation. However, no technique has gained widespread clinical use to date due to shallow imaging depth or the absence of functional imaging capability. Photoacoustic (PA) imaging is a novel technology that combines the strengths of optical and ultrasound imaging to reveal the molecular composition of tissue at high resolution. Encouraging results have been obtained from previous animal and human studies on melanoma, but there is still a lack of clinical data. This is the largest study of its kind to date, including 52 melanomas and nevi. 3D multiwavelength PA scanning was performed ex vivo, using 59 excitation wavelengths from 680 nm to 970 nm. Spectral unmixing over this broad wavelength range, accounting for the absorption of several tissue chromophores, provided excellent contrast between healthy tissue and tumor. Combining the results of spectral analysis with spatially resolved information provided a map of the tumor borders in greater detail than previously reported. The tumor dimensions determined with PA imaging were strongly correlated with those determined by histopathological examination for both melanomas and nevi.
|Tidskrift||Biomedical Optics Express|
|Status||Published - 2021|
Bibliografisk informationFunding Information:
Funding. Swedish Government Grant for Clinical Research; Skåne University Hospital (SUS) Research Grants; Skåne County Council Research Grants; Lund University Grant for Research Infrastructure; the Swedish Cancer Foundation; Crown Princess Margaret’s Foundation (KMA); Friends of the Visually Impaired Association in the county of Gävleborg; Foundation for the Visually Impaired in the County of Malmöhus; Lund Laser Center Research Grant; IngaBritt and Arne Lundberg’s Research Foundation; the Swedish Eye Foundation; the Cronqvist Foundation; the Swedish Medical Association.
© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Copyright 2021 Elsevier B.V., All rights reserved.
- Cancer och onkologi
- Dermatologi och venereologi
- Functional imaging
- Imaging techniques
- Magnetic resonance imaging
- Optical coherence tomography
- Photoacoustic imaging
- Positron emission tomography