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Related Concept Videos

Perception01:28

Perception

Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Subliminal Perception01:15

Subliminal Perception

Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Prosopagnosia01:24

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
Introducing Social Perception01:29

Introducing Social Perception

Perceiving others accurately is fundamental to effective communication and relationship-building. Social perception, a key concept in social psychology, refers to the cognitive processes through which individuals gather and interpret information about others to understand their actions, intentions, and motivations. This process extends beyond spoken words and overt behaviors, incorporating subtle nonverbal cues and contextual factors.Nonverbal Cues and Their SignificanceNonverbal cues play a...
Synesthesia01:27

Synesthesia

Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...

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A Semantic Priming Event-related Potential (ERP) Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder
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Perseus: perception with semantic endoscopic understanding and SLAM.

Ayberk Acar1, Fangjie Li2, Susheela Sharma Stern3

  • 1Department of Computer Science, Vanderbilt University, 2301 Vanderbilt Place, Nashville, TN, 37235, USA. ayberk.acar@vanderbilt.edu.

International Journal of Computer Assisted Radiology and Surgery
|May 26, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel perception pipeline for natural orifice surgery, enhancing 3D scene understanding for improved surgeon guidance and automation. The system achieves accurate 3D reconstructions from monocular videos, proving robust across various surgical scenarios.

Keywords:
3D ReconstructionDepth estimationEndoscopyNOTESRegistrationSegmentation

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Area of Science:

  • Medical Robotics
  • Computer Vision
  • Surgical Navigation

Background:

  • Natural orifice surgery offers minimally invasive benefits but presents visualization challenges.
  • Enhanced scene understanding is crucial for surgeon guidance and automation in these procedures.

Purpose of the Study:

  • To develop a perception pipeline for semantically informed 3D reconstructions in natural orifice surgery.
  • To improve surgeon guidance and enable automation through reliable surgical scene understanding.

Main Methods:

  • Integrated learning-based segmentation, depth estimation, and real-time SLAM for 3D reconstruction from monocular videos.
  • Propagated 2D semantic labels into 3D space to create real-time segmented surgical maps.
  • Utilized robot pose registration to resolve scale ambiguity and enable real-time use in robotic surgery.

Main Results:

  • Achieved sub-millimeter reconstruction accuracy and pose registration RMSE of 0.9 mm.
  • Demonstrated improved processing time over offline methods while maintaining reconstruction accuracy.
  • Showcased robustness in challenging scenarios like submerged prostate and cadaver airway explorations.

Conclusions:

  • A modular perception pipeline integrating semantic segmentation with real-time monocular SLAM was presented for natural orifice surgeries.
  • The pipeline provides a promising solution for surgical scene understanding, facilitating automation and surgeon guidance.
  • The framework's plug-and-play design and generalizability support scalable clinical translation.