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Related Concept Videos

Work Done During Volume Change01:17

Work Done During Volume Change

In mechanics, work is done on an object when the force acting on it displaces the object. In thermodynamics, work done on a system can be estimated when the system's volume changes during any thermodynamic process.
Consider a gas confined to a cylinder fitted with a movable piston at one end. If the gas expands from volume V1 to volume V2, it exerts a force on the piston, such that the piston moves by a distance dr.
The work done by the gas on the piston can be expressed as
Control Volume and System Representations01:16

Control Volume and System Representations

Two key frameworks are employed to analyze mass, energy, and momentum transfer: the control volume approach and the system approach. These frameworks offer different perspectives, depending on whether the focus is on a specific region in space (control volume approach) or a defined mass of fluid (system approach).
The control volume approach considers a stationary region in space through which fluid flows. This region is bounded by a control surface.  For instance, in the case of water flowing...
Respiratory Volumes01:15

Respiratory Volumes

Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
Respiratory Volumes and Capacities01:22

Respiratory Volumes and Capacities

The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
Respiratory Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
Le Chatelier's Principle: Changing Volume (Pressure)02:32

Le Chatelier's Principle: Changing Volume (Pressure)

For gas-phase equilibria, changes in the concentrations of reactants and products can occur with altered volume and pressure. The partial pressure, P, of an ideal gas is proportional to its molar concentration, M.

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Direct volume editing.

Kai Bürger1, Jens Krüger, Rüdiger Westermann

  • 1Technische Universität München, tum.3D. buergerk@in.tum.de

IEEE Transactions on Visualization and Computer Graphics
|November 8, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces interactive volume editing techniques using graphics processing units (GPUs) for intuitive data manipulation. These methods enable precise structure modification, artifact removal, and texture application in 3D scalar fields.

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Area of Science:

  • Computer Graphics
  • Scientific Visualization
  • Medical Imaging

Background:

  • Interactive volume editing is crucial for visualizing and analyzing complex 3D datasets.
  • Existing methods often lack intuitive controls or precise manipulation capabilities.

Purpose of the Study:

  • To present a novel methodology for interactive volume editing on GPUs.
  • To enable intuitive modification of appearance and structure in volumetric scalar fields.
  • To achieve sub-voxel accuracy in interactive volume editing.

Main Methods:

  • Development of 3D spherical brushes for intuitive data coloring and modification.
  • Implementation of high-resolution selection volumes for focus+context editing.
  • Introduction of a fast texture-pasting technique onto iso-surfaces.

Main Results:

  • Demonstration of interactive structure isolation, hole filling, and artifact removal.
  • Achieved sub-voxel accuracy in volume editing using selection volumes.
  • Enabled structure-aligned texture application for volume augmentation and annotation.

Conclusions:

  • The presented GPU-accelerated methods offer efficient and intuitive tools for interactive volume editing.
  • The techniques facilitate enhanced data analysis, visualization, and annotation of 3D scalar fields.