Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Equation of Motion for a Rigid Body01:12

Equation of Motion for a Rigid Body

623
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...
623
Planar Rigid-Body Motion01:22

Planar Rigid-Body Motion

1.0K
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...
1.0K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

75.5K
Oxidation–Reduction Reactions
75.5K
Rigid Body Equilibrium Problems - I00:49

Rigid Body Equilibrium Problems - I

5.5K
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.
5.5K
Rigid Body Equilibrium Problems - II01:21

Rigid Body Equilibrium Problems - II

8.0K
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?
8.0K
Kinetic Energy for a Rigid Body01:13

Kinetic Energy for a Rigid Body

539
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.
539

You might also read

Related Articles

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

Sort by
Same author

Endonuclease-Assisted Selective Exponential Amplification for Ultrasensitive Enrichment and Detection of Low-Abundance Mutant Alleles in Lung Cancer.

The Journal of molecular diagnostics : JMD·2026
Same author

Trehalose-6-phosphate phosphatase-mediated trehalose metabolism shapes sorghum grain domestication for brewing adaptation.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·2026
Same author

Levels of analysis for large language models.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same author

Prenatal exposure to per- and polyfluoroalkyl substances, placental DNA methylation, and small vulnerable newborns: Insights from the Shanghai maternal-child pairs cohort.

Environmental research·2026
Same author

MSMO1 promotes chemotherapy resistance through modulation of T-MAS metabolism via PERK/elF2α/ATF4/CHOP pathway.

iScience·2026
Same author

Prenatal PFAS exposure and childhood respiratory allergic diseases: Findings from Shanghai Birth cohort Consortium.

Environment international·2026
Same journal

BPENet: Boundary perception enhancement network for retinal vessel and coronary angiogram segmentation.

Journal of X-ray science and technology·2026
Same journal

Semi-supervised YOLO-DEP for high-resolution X-ray component localization and counting.

Journal of X-ray science and technology·2026
Same journal

Attention based multi-scale edge-aware segmentation and convolutional transformer framework for automated glaucoma detection from fundus images.

Journal of X-ray science and technology·2026
Same journal

Improving the robustness of radiomic features to patient size variations in CBCT imaging for radiotherapy.

Journal of X-ray science and technology·2026
Same journal

DH-OOD: A decoupled hybrid framework for robust skin lesion classification via semantic-structural fusion.

Journal of X-ray science and technology·2026
Same journal

Development and evaluation of deep learning models for automatic coronary stenosis segmentation in X-ray angiography.

Journal of X-ray science and technology·2026
See all related articles

Related Experiment Video

Updated: Jan 28, 2026

Equipment Setup and Artifact Removal for Simultaneous Electroencephalogram and Functional Magnetic Resonance Imaging for Clinical Review in Epilepsy
10:23

Equipment Setup and Artifact Removal for Simultaneous Electroencephalogram and Functional Magnetic Resonance Imaging for Clinical Review in Epilepsy

Published on: June 23, 2023

2.7K

Rigid motion artifact reduction in CT using extended difference function.

Yuan Zhang1, Liyi Zhang1,2, Yunshan Sun2

  • 1School of Electrical and Information Engineering, Tianjin University, Tianjin, China.

Journal of X-Ray Science and Technology
|March 12, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new method to estimate patient motion from computed tomography (CT) sinograms, significantly improving image quality and reducing artifacts. The technique enhances motion estimation accuracy and computational efficiency for clearer CT scans.

Keywords:
Computed Tomography (CT)extended difference functionfan-beammotion artifactsmotion estimation

More Related Videos

Visualizing Motion Patterns in Acupuncture Manipulation
08:18

Visualizing Motion Patterns in Acupuncture Manipulation

Published on: July 16, 2016

9.2K
The Rigid Tube as an Alternative in Controlling the Problematic Airway
08:26

The Rigid Tube as an Alternative in Controlling the Problematic Airway

Published on: June 6, 2020

6.9K

Related Experiment Videos

Last Updated: Jan 28, 2026

Equipment Setup and Artifact Removal for Simultaneous Electroencephalogram and Functional Magnetic Resonance Imaging for Clinical Review in Epilepsy
10:23

Equipment Setup and Artifact Removal for Simultaneous Electroencephalogram and Functional Magnetic Resonance Imaging for Clinical Review in Epilepsy

Published on: June 23, 2023

2.7K
Visualizing Motion Patterns in Acupuncture Manipulation
08:18

Visualizing Motion Patterns in Acupuncture Manipulation

Published on: July 16, 2016

9.2K
The Rigid Tube as an Alternative in Controlling the Problematic Airway
08:26

The Rigid Tube as an Alternative in Controlling the Problematic Airway

Published on: June 6, 2020

6.9K

Area of Science:

  • Medical Imaging
  • Image Processing
  • Computational Science

Background:

  • Patient motion during computed tomography (CT) scans degrades image quality by causing spatial resolution loss and artifacts.
  • Motion artifacts are a significant challenge in obtaining accurate diagnostic information from CT images.

Purpose of the Study:

  • To develop and validate a novel method for estimating motion parameters directly from sinograms.
  • To eliminate motion artifacts in CT images through accurate motion parameter estimation.

Main Methods:

  • The proposed method utilizes an extended difference function applied to sinogram data divided by view angles.
  • Radon transform is applied, and minimum points of the extended difference functions are identified to determine relative displacements.
  • Estimated motion parameters are integrated into the image reconstruction process for artifact compensation.

Main Results:

  • The new method demonstrated a 30% reduction in running time compared to previous work.
  • Phantom experiments showed lower relative mean rotation excursion (RMRE) and relative mean translation excursion (RMTE) compared to the Helgason-Ludwig consistency condition (HLCC) method.
  • The new method achieved reduced root mean square error (RMSE) and increased Pearson correlation coefficient (CC) and mean structural similarity index (MSSIM) compared to the HLCC method.

Conclusions:

  • The developed method offers improved accuracy in motion estimation for CT scans.
  • Higher computational efficiency was achieved, leading to faster processing times.
  • The technique effectively produces high-quality CT images by mitigating motion-induced artifacts.