Abeytunge S, Li Y, Larson B, Peterson G, Seltzer E, Toledo-Crow R, Rajadhyaksha M. Confocal microscopy with strip mosaicing for rapid imaging over large areas of excised tissue.
JOURNAL OF BIOMEDICAL OPTICS 2013;
18:61227. [PMID:
23389736 PMCID:
PMC3565124 DOI:
10.1117/1.jbo.18.6.061227]
[Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 12/19/2012] [Accepted: 12/21/2012] [Indexed: 05/20/2023]
Abstract
Confocal mosaicing microscopy is a developing technology platform for imaging tumor margins directly in freshly excised tissue, without the processing required for conventional pathology. Previously, mosaicing on 12-×-12 mm² of excised skin tissue from Mohs surgery and detection of basal cell carcinoma margins was demonstrated in 9 min. Last year, we reported the feasibility of a faster approach called "strip mosaicing," which was demonstrated on a 10-×-10 mm² of tissue in 3 min. Here we describe further advances in instrumentation, software, and speed. A mechanism was also developed to flatten tissue in order to enable consistent and repeatable acquisition of images over large areas. We demonstrate mosaicing on 10-×-10 mm² of skin tissue with 1-μm lateral resolution in 90 s. A 2.5-×-3.5 cm² piece of breast tissue was scanned with 0.8-μm lateral resolution in 13 min. Rapid mosaicing of confocal images on large areas of fresh tissue potentially offers a means to perform pathology at the bedside. Imaging of tumor margins with strip mosaicing confocal microscopy may serve as an adjunct to conventional (frozen or fixed) pathology for guiding surgery.
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