Title
Remote non-invasive stereoscopic imaging of blood vessels: First in-vivo results of a new multispectral contrast enhancement technology
Author
Wieringa, F.P.
Mastik, F.
ten Cate, F.J.
Neumann, H.A.M.
van der Steen, A.F.W.
TNO Kwaliteit van Leven
Publication year
2006
Abstract
We describe a contactless optical technique selectively enhancing superficial blood vessels below variously pigmented intact human skin by combining images in different spectral bands. Two CMOS-cameras, with apochromatic lenses and dual-band LED-arrays, simultaneously streamed Left (L) and Right (R) image data to a dual-processor PC. Both cameras captured color images within the visible range (VIS, 400-780 nm) and grey-scale images within the near infrared range (NIR, 910-920 nm) by sequentially switching between LED-array emission bands. Image-size-settings of 1280 × 1024 for VIS & 640 × 512 for NIR produced 12 cycles/s (1 cycle = 1 VIS L&R-pair + 1 NIR L&R-pair). Decreasing image-size-settings (640 × 512 for VIS and 320 × 256 for NIR) increased camera-speed to 25 cycles/s. Contrasts from below the tissue surface were algorithmically distinguished from surface shadows, reflections, etc. Thus blood vessels were selectively enhanced and back-projected into the stereoscopic VIS-color-image using either a 3D-display or conventional shutter glasses. As a first usability reconnaissance we applied this custom-built mobile stereoscopic camera for several clinical settings: • blood withdrawal; • vein inspection in dark skin; • vein detection through iodide; • varicose vein and nevi pigmentosum inspection. Our technique improves blood vessel visualization compared to the naked eye, and supports depth perception. cop. Biomedical Engineering Society 2006.
Subject
Biomedical Innovation
Biology
Healthy Living
Biomedical Research
3D-display
Contactless enhanced viewing of superficial vasculature
Intuitive technology
Multispectral stereoscopy
Reconnaissance of feasibility for various clinical applications
Band structure
Biodiversity
Image analysis
Light emitting diodes
Optical engineering
Skin
Special effects
Three dimensional computer graphics
Contactless enhanced viewing of superficial vasculature
Intuitive technology
Multispectral stereoscopy
Reconnaissance of feasibility for various clinical applications
Blood vessels
Histology
Instrumentation
Methodology
Three dimensional imaging
Vascularization
Forearm
Humans
Imaging, Three-Dimensional
To reference this document use:
http://resolver.tudelft.nl/uuid:848367ad-ab2f-4ecc-a8a1-1178255fd50f
TNO identifier
239700
ISSN
0090-6964
Source
Annals of Biomedical Engineering, 34 (12), 1870-1878
Document type
article