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Related Concept Videos

Virtual Work01:20

Virtual Work

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The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
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Principle of Virtual Work: Problem Solving01:13

Principle of Virtual Work: Problem Solving

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The principle of virtual work is an essential concept in the field of mechanics and engineering. This is used to solve problems related to the equilibrium of a structure or system. It is based on the assumption that if a system is in equilibrium, the work done by all the forces during a virtual displacement is zero. This principle is applied by considering virtual displacements of the system and the corresponding work done by internal and external forces.
To apply the principle of virtual work,...
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Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

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Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
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Obedience01:08

Obedience

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According to obedience research, we may harm others under the forceful pressures of an authority figure (Milgram, 1974). How about if the inappropriate orders were delivered with less force? The increasing interdependence between nurses and physicians compelled Hofling and his colleagues to explore nurses’ reactions to a potentially harmful medical request made by the perceived authority figure, the doctor (Hofling, Brotzman, Dalrymple, Graves, & Pierce, 1966). In this situation,...
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Cognitive Dissonance01:38

Cognitive Dissonance

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Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
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Related Experiment Video

Updated: Feb 8, 2026

Virtual Reality Experiments with Physiological Measures
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Virtual Reality Experiments with Physiological Measures

Published on: August 29, 2018

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Virtual Reality in Neurointervention.

Chin Siang Ong1,2, Gerard Deib3, Pooja Yesantharao1

  • 1Division of Cardiac Surgery, Johns Hopkins Hospital, Baltimore, MD, USA.

Journal of Vascular and Interventional Neurology
|June 21, 2018
PubMed
Summary
This summary is machine-generated.

Virtual reality (VR) offers a new way to visualize complex pseudoaneurysms. This technology aids in preprocedural planning for neurovascular disorders, improving treatment decisions.

Keywords:
Virtual realitycarotid pseudoaneurysminterventional neuroradiologyneurointervention

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Area of Science:

  • Medical Imaging
  • Neurosurgery
  • Virtual Reality

Background:

  • Virtual reality (VR) provides immersive 3D environments with realistic depth perception.
  • Recent advancements enable interaction with virtual objects using VR controllers.

Purpose of the Study:

  • To describe preliminary experience using VR as an adjunct to traditional angiography.
  • To evaluate VR's utility in preprocedural workup for complex pseudoaneurysms.

Main Methods:

  • Angiographic MRI data was segmented into 3D meshes of carotid vasculature.
  • 3D meshes were projected into VR for inspection and manipulation (handling, rotation, magnification, sectioning).

Main Results:

  • Successful 3D segmentation and VR projection of a complex pseudoaneurysm.
  • VR and conventional imaging were equally effective in pathology identification.
  • VR enhanced understanding of vascular anatomy and pseudoaneurysm angioarchitecture.

Conclusions:

  • VR is feasible for preprocedural evaluation of complex neurovascular disorders.
  • This novel visualization may aid in patient-specific treatment planning and device selection.