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Related Concept Videos

Vision01:24

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Autonomic Nervous System01:22

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Autonomous Robotic Intracardiac Catheter Navigation Using Haptic Vision.

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Autonomous robotic catheters can now navigate the beating heart. This breakthrough in autonomous navigation rivals clinician performance, paving the way for advanced robotic procedures.

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Area of Science:

  • Robotics
  • Medical Devices
  • Biomedical Engineering

Background:

  • Minimally invasive procedures require precise navigation to internal sites.
  • Autonomous navigation within dynamic environments like the beating heart has not been demonstrated.
  • Current procedures rely on manual control, subject to human limitations.

Purpose of the Study:

  • To demonstrate the feasibility of autonomous navigation for minimally invasive procedures.
  • To develop and test a robotic catheter system capable of navigating the beating heart autonomously.
  • To establish autonomous navigation as a foundational capability for future robotic interventions.

Main Methods:

  • Development of a robotic catheter utilizing wall-following algorithms inspired by animal behavior.
  • Implementation of haptic vision, a hybrid imaging and force-sensing system, for navigation.
  • In vivo animal experiments to evaluate autonomous catheter performance within the heart.

Main Results:

  • The autonomously controlled robotic catheter successfully navigated the beating heart.
  • Performance of the autonomous system was comparable to that of experienced clinicians.
  • The system demonstrated precise and repeatable tool motion independent of operator fatigue.

Conclusions:

  • Autonomous navigation within the beating heart is achievable.
  • Robotic catheter systems can perform complex navigation tasks with performance rivaling human experts.
  • Autonomous navigation enhances procedural safety and precision, freeing clinicians for critical decision-making.