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Related Experiment Video

Updated: Jun 24, 2026

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Published on: February 23, 2017

A high-resolution, three-dimensional thin endoscope for fetal surgery.

E Kobayashi¹, T Ando, H Yamashita

¹School of Engineering, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo, 113-8656, Japan. etsuko@bmpe.t.u-tokyo.ac.jp

Surgical Endoscopy

|March 17, 2009

Summary

Surgeons can now use a new thin, high-resolution 3D endoscope for fetal surgery. This advanced device offers excellent image quality and depth perception, aiding complex procedures.

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Full-Endoscopic Surgery for Hypothalamic Hamartoma Resection

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Published on: April 12, 2024

Area of Science:

Medical Technology
Surgical Innovation
Minimally Invasive Surgery

Background:

Fetal surgery requires high surgeon skill.
Three-dimensional (3D) endoscopes enhance depth perception during surgery.
Existing 3D endoscopes are too large for fetal procedures (approx. 10 mm diameter).

Purpose of the Study:

To develop a high-resolution, thin 3D endoscope specifically for fetal surgery.
To overcome the size limitations of current 3D endoscopic technology.

Main Methods:

Developed a 5.4 mm diameter 3D endoscope utilizing two 1/10-inch micro charge-coupled device (CCD) cameras.
Optimized the endoscope's angle of convergence (2.6 degrees) for reduced visual fatigue.
Evaluated image quality and depth perception against conventional 3D and 2D endoscopes.

Main Results:

The thin 3D endoscope can distinguish lines 0.2-0.25 mm wide.
Depth perception is comparable to a standard 11 mm 3D endoscope.
Significantly higher accuracy in depth perception tests in water compared to 2D endoscopes.

Conclusions:

The developed thin 3D endoscope provides adequate image quality and depth perception for surgical applications.
This technology is suitable for use even in wet environments encountered during fetal surgery.