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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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Econometric Views, often stylized as EViews, is a package that merges statistical analysis with econometric studies. It is designed to provide tools for time series analysis, forecasting, and econometric model simulation. The software originated from MicroTSP software and has evolved significantly since its inception in 1981. The history of EViews is marked by a continuous effort to enhance its computational speed and user interface. It was initially developed for large computing systems but...
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Cranial Bones: Lateral View01:27

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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Multi-view vision system for laparoscopy surgery.

Brahim Tamadazte1, Anthony Agustinos, Philippe Cinquin

  • 1FEMTO-ST Institute, AS2M Department, Université de Franche-Comté/CNRS/ENSMM/UTBM, 24 rue Savary, 25000 , Besano̧n, France, brahim.tamadazte@femto-st.fr.

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Summary
This summary is machine-generated.

This study developed an augmented laparoscopy system, enhancing the endoscope's field of view. The new system significantly reduced procedure time in preclinical testing, offering potential advantages for laparoscopic surgery.

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Area of Science:

  • Minimally Invasive Surgery
  • Surgical Technology
  • Medical Imaging

Background:

  • Conventional endoscopy in laparoscopy has limitations in field of view, potentially leading to complications and longer procedure times.
  • An augmented laparoscopy system aims to overcome these limitations by providing a global endoscopic view.

Purpose of the Study:

  • To develop and test an augmented laparoscopy system with an increased field of view.
  • To evaluate the system's feasibility and potential advantages over traditional endoscopy.

Main Methods:

  • Integrated high-definition miniature cameras into a traditional endoscope to create a panoramic vision device.
  • Designed and validated a deployment, fixation, and extraction system for the cameras via trocar.
  • Conducted preclinical experiments comparing procedure times for a pick-and-place task using the augmented system versus a traditional endoscope.

Main Results:

  • The augmented laparoscopy system demonstrated a statistically significant reduction in procedure time for a pick-and-place task.
  • Preclinical validation included testbench and human cadaver experiments.

Conclusions:

  • The developed augmented laparoscopy system is feasible and shows potential benefits for laparoscopic surgery.
  • Further in vivo testing is recommended to confirm clinical utility and establish its advantages.