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

Planar Rigid-Body Motion01:22

Planar Rigid-Body Motion

1.4K
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...
1.4K
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

694
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
694
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

628
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
628
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

716
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
716
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

498
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
498
Transformation of Plane Strain01:12

Transformation of Plane Strain

673
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
673

You might also read

Related Articles

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

Sort by
Same author

Toward real-time alignment of 3D CT and 2D X-ray with multi-stage CNNs.

Computer assisted surgery (Abingdon, England)·2026
Same author

MultiMorph: On-demand Atlas Construction.

Proceedings. IEEE Computer Society Conference on Computer Vision and Pattern Recognition·2026
Same author

Consistency Regularization Improves Placenta Segmentation in Fetal EPI MRI Time Series.

Perinatal, preterm and paediatric image analysis (2025)·2026
Same author

Learning General-Purpose Biomedical Volume Representations using Randomized Synthesis.

... International Conference on Learning Representations·2026
Same author

Robust Fetal Pose Estimation across Gestational Ages via Cross-Population Augmentation.

Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention·2026
Same author

Intraoperative 2D/3D Image Registration via Differentiable X-ray Rendering.

Proceedings. IEEE Computer Society Conference on Computer Vision and Pattern Recognition·2025

Related Experiment Video

Updated: May 1, 2026

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
05:05

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

8.1K

PolyPose: Deformable 2D/3D Registration via Polyrigid Transformations.

Vivek Gopalakrishnan1, Neel Dey2, Polina Goll1

  • 1MIT.

Arxiv
|June 10, 2025
PubMed
Summary
This summary is machine-generated.

PolyPose accurately determines patient 3D pose from limited 2D X-rays using a novel piecewise rigid approach. This method enhances intraoperative guidance where traditional 3D imaging is unavailable.

More Related Videos

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
07:01

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

Published on: October 24, 2019

9.9K
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
06:09

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Published on: March 12, 2021

3.3K

Related Experiment Videos

Last Updated: May 1, 2026

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
05:05

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

8.1K
3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
07:01

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

Published on: October 24, 2019

9.9K
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
06:09

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Published on: March 12, 2021

3.3K

Area of Science:

  • Medical Imaging
  • Computational Anatomy
  • Surgical Navigation

Background:

  • Intraoperative 3D patient pose determination is crucial for interventional settings.
  • Preoperative volumetric imaging (CT, MRI) offers precision but is unavailable during procedures.
  • 2D X-ray imaging is used intraoperatively, necessitating methods to bridge 2D and 3D information.

Purpose of the Study:

  • To develop a robust and simple method for deformable 2D/3D registration to enable volumetric guidance during procedures.
  • To address the challenge of determining 3D patient pose from limited 2D X-ray views.
  • To provide accurate 3D localization in sparse-view and limited-angle scenarios.

Main Methods:

  • Introduced PolyPose, a deformable 2D/3D registration method.
  • Parameterized 3D deformation fields as compositions of rigid transforms, respecting piecewise rigidity of human anatomy.
  • Leveraged anatomical constraints to avoid reliance on expensive, patient-specific deformation regularizers.

Main Results:

  • PolyPose successfully aligned preoperative volumes to as few as two X-ray images.
  • Demonstrated effectiveness across diverse datasets from orthopedic surgery and radiotherapy.
  • Outperformed existing methods in challenging sparse-view and limited-angle registration tasks.

Conclusions:

  • PolyPose offers a strong inductive bias for accurate 3D pose estimation from limited 2D X-rays.
  • The method provides crucial 3D guidance in settings where current registration techniques fail.
  • Enables integration of preoperative volumetric data into intraoperative workflows for enhanced precision.