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Updated: Nov 2, 2025
High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging
Published on: January 11, 2011
High frame rate video mosaicking microendoscope to image large regions of intact tissue with subcellular resolution
Brady Hunt1, Jackson Coole1, David Brenes1
1Department of Bioengineering, Rice University, 6100 Main Street, Houston, TX 77025, USA.
Abstract:
High-resolution microendoscopy (HRME) is a low-cost strategy to acquire images of intact tissue with subcellular resolution at frame rates ranging from 11 to 18 fps. Current HRME imaging strategies are limited by the small microendoscope field of view (∼0.5 mm2); multiple images must be acquired and reliably registered to assess large regions of clinical interest. Image mosaics have been assembled from co-registered frames of video acquired as a microendoscope is slowly moved across the tissue surface, but the slow frame rate of previous HRME systems made this approach impractical for acquiring quality mosaicked images from large regions of interest. Here, we present a novel video mosaicking microendoscope incorporating a high frame rate CMOS sensor and optical probe holder to enable high-speed, high quality interrogation of large tissue regions of interest. Microendoscopy videos acquired at >90 fps are assembled into an image mosaic. We assessed registration accuracy and image sharpness across the mosaic for images acquired with a handheld probe over a range of translational speeds. This high frame rate video mosaicking microendoscope enables in vivo probe translation at >15 millimeters per second while preserving high image quality and accurate mosaicking, increasing the size of the region of interest that can be interrogated at high resolution from 0.5 mm2 to >30 mm2. Real-time deployment of this high-frame rate system is demonstrated in vivo and source code made publicly available.
Insights
A new high-speed microendoscope system captures detailed tissue images at over 90 fps, enabling rapid, large-area imaging for clinical applications. This technology significantly expands the field of view for high-resolution microscopic tissue analysis.
Area of Science:
- Biomedical Engineering
- Optical Imaging
- Medical Technology
Background:
- High-resolution microendoscopy (HRME) offers subcellular detail but is limited by a small field of view (0.5 mm²).
- Previous HRME systems had slow frame rates, making image mosaicking of large tissue areas impractical.
- Assessing large tissue regions requires stitching multiple low-resolution images, a time-consuming process.
Purpose of the Study:
- To develop a novel high-frame rate microendoscope for rapid, high-quality imaging of large tissue areas.
- To overcome the limitations of small field of view and slow frame rates in current HRME systems.
- To enable efficient and accurate mosaicking of microendoscopic videos for comprehensive tissue analysis.
Main Methods:
- Incorporated a high frame rate CMOS sensor and an optimized optical probe holder into the microendoscope system.
- Acquired microendoscopy videos at frame rates exceeding 90 fps.
- Developed image mosaicking algorithms to assemble high-speed videos, assessing registration accuracy and image sharpness.
Main Results:
- The novel system enables microendoscope probe translation at speeds greater than 15 mm/s while maintaining image quality and accurate mosaicking.
- The effective region of interest for high-resolution interrogation increased from 0.5 mm² to over 30 mm².
- Real-time in vivo deployment was successfully demonstrated, with source code made publicly available.
Conclusions:
- The high-frame rate video mosaicking microendoscope significantly enhances the efficiency and scope of high-resolution tissue imaging.
- This technology expands the capabilities of HRME for in vivo clinical applications requiring large-area, detailed tissue assessment.
- The open-source availability of the system promotes further research and development in advanced endoscopic imaging.
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