Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Rigid Body Equilibrium Problems - I

Rigid Body Equilibrium Problems - I

A rigid body is said to be in static equilibrium when the net force and the net torque acting on the system is equal to zero. To solve for rigid body equilibrium problems, do the following steps.

Rigid Body Equilibrium Problems - II

Rigid Body Equilibrium Problems - II

A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero.
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?

Planar Rigid-Body Motion

Planar Rigid-Body Motion

Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...

Curvilinear Motion: Rectangular Components

Curvilinear Motion: Rectangular Components

Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the...

Equation of Motion for a Rigid Body

Equation of Motion for a Rigid Body

The movement of a rigid object can be understood through the equations that explain both translational and rotational motion about the center of mass of the object, point G. This center of mass is the point where the equation of motion for translational motion comes into play, as per Newton's Second Law.
The combined moments generated about the center of mass of the object are equal to the rate of change of the angular momentum of the body. An external force, when applied at a different...

Kinetic Energy for a Rigid Body

Kinetic Energy for a Rigid Body

Imagine a solid object involved in a general planar movement, with its center of mass pinpointed at a spot labeled G. The object's kinetic energy relative to an arbitrary point A can be quantified for each of its particles - the ith particle in this case. This measurement is achieved through the employment of the relative velocity definition. The position vector, known as rA, extends from point A to the mass element i.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

SteuerLLM: local specialized large language model for German tax law analysis.

Scientific reports·2026

Same author

Inferring and evaluating network medicine-based disease modules with nextflow.

Bioinformatics (Oxford, England)·2026

Same author

Generating Alzheimer's narratives using large language models.

BMC medical informatics and decision making·2026

Same author

Pushing the boundaries of robotic computed tomography: automated twin-robot CT scan with maximum reachability.

Scientific reports·2026

Same author

Synthesizing vocal tract magnetic resonance imaging sequences with phoneme-aware diffusion models.

Journal of medical imaging (Bellingham, Wash.)·2026

Same author

Illuminating the black box of reservoir computing.

Scientific reports·2026

Search research articles

Related Experiment Video

Updated: Oct 15, 2025

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

Published on: July 2, 2021

Rigid and Non-Rigid Motion Compensation in Weight-Bearing CBCT of the Knee Using Simulated Inertial Measurements.

Jennifer Maier, Marlies Nitschke, Jang-Hwan Choi

IEEE Transactions on Bio-Medical Engineering

|October 29, 2021

Summary

Involuntary motion artifacts in knee cone-beam CT can be reduced using inertial measurement units (IMUs). This study confirms the feasibility of IMU-based motion compensation for improved diagnostic imaging quality.

More Related Videos

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

Related Experiment Videos

Last Updated: Oct 15, 2025

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy

Published on: July 2, 2021

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

Area of Science:

Medical Imaging
Biomedical Engineering
Biomechanics

Background:

Involuntary subject motion is a primary cause of artifacts in weight-bearing knee cone-beam CT (CBCT).
Effective motion compensation is crucial for achieving diagnostic image quality in knee CBCT.
Inertial Measurement Units (IMUs) offer a potential solution for motion estimation.

Purpose of the Study:

To propose and evaluate the use of IMUs for motion estimation and compensation in weight-bearing knee CBCT.
To assess the performance of different IMU-based motion correction strategies.
To investigate the impact of IMU noise on the feasibility of these methods in clinical settings.

Main Methods:

A simulation study was conducted using real motion data from an optical tracking system.
Three IMU-based correction approaches were evaluated: rigid motion correction, non-rigid 2D projection deformation, and non-rigid 3D dynamic reconstruction.
An initialization process leveraging system geometry was developed, and IMU noise was simulated to assess real-world applicability.

Main Results:

All IMU-based methods demonstrated motion correction performance comparable to or exceeding state-of-the-art marker-based approaches.
Significant improvements were observed: 24-35% increase in structural similarity index and 78-85% reduction in root mean squared error compared to uncorrected scans.
Noise analysis indicated a required 10^5-fold improvement in commercially available IMU noise levels for optimal application.

Conclusions:

The simulation study validates the feasibility of IMU-based motion compensation for knee CBCT.
Specific improvements in IMU hardware are necessary for successful clinical implementation.
This research establishes a foundation for future IMU-driven advancements in CBCT motion compensation.