Benchtop and Animal Validation of a Projective Imaging System for Potential Use in Intraoperative Surgical Guidance

PLoS One. 2016 Jul 8;11(7):e0157794. doi: 10.1371/journal.pone.0157794. eCollection 2016.

Abstract

We propose a projective navigation system for fluorescence imaging and image display in a natural mode of visual perception. The system consists of an excitation light source, a monochromatic charge coupled device (CCD) camera, a host computer, a projector, a proximity sensor and a Complementary metal-oxide-semiconductor (CMOS) camera. With perspective transformation and calibration, our surgical navigation system is able to achieve an overall imaging speed higher than 60 frames per second, with a latency of 330 ms, a spatial sensitivity better than 0.5 mm in both vertical and horizontal directions, and a projection bias less than 1 mm. The technical feasibility of image-guided surgery is demonstrated in both agar-agar gel phantoms and an ex vivo chicken breast model embedding Indocyanine Green (ICG). The biological utility of the system is demonstrated in vivo in a classic model of ICG hepatic metabolism. Our benchtop, ex vivo and in vivo experiments demonstrate the clinical potential for intraoperative delineation of disease margin and image-guided resection surgery.

MeSH terms

  • Algorithms
  • Animals
  • Calibration
  • Chickens
  • Equipment Design
  • Gels
  • Humans
  • Indocyanine Green / chemistry
  • Liver / diagnostic imaging
  • Metals
  • Mice, Inbred BALB C
  • Monitoring, Intraoperative / instrumentation*
  • Neoplasms / pathology
  • Optical Imaging / instrumentation*
  • Oxides
  • Phantoms, Imaging
  • Semiconductors
  • Surgery, Computer-Assisted / instrumentation*

Substances

  • Gels
  • Metals
  • Oxides
  • Indocyanine Green

Grants and funding

This project was funded by Natural Science Foundation of China (Nos. 81271527 and 81327803) and the Fundamental Research Funds for the Central Universities (WK2090090013). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.