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

Computed Tomography01:10

Computed Tomography

9.5K
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
9.5K
X-ray Imaging01:24

X-ray Imaging

11.0K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
11.0K
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

1.2K
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
1.2K
Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

633
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
633

You might also read

Related Articles

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

Sort by
Same author

A vendor-neutral functional MRI acquisition protocol for multi-site studies.

Aperture neuro·2026
Same author

Phantom- and simulation-based validation of combined diffusion relaxometry in ex vivo ADRD white matter.

bioRxiv : the preprint server for biology·2026
Same author

Smooth optimization using global and local low-rank regularizers.

SIAM journal on imaging sciences·2026
Same author

Bilevel Optimized Implicit Neural Representation for Scan-Specific Accelerated MRI Reconstruction.

IEEE transactions on medical imaging·2026
Same author

Scan-Adaptive MRI Undersampling Using Neighbor-based Optimization (SUNO).

IEEE transactions on computational imaging·2026
Same author

Spatiotemporal Maps for Dynamic MRI Reconstruction.

IEEE transactions on computational imaging·2026

Related Experiment Video

Updated: Mar 28, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

15.0K

Relaxed Linearized Algorithms for Faster X-Ray CT Image Reconstruction.

Hung Nien, Jeffrey A Fessler

    IEEE Transactions on Medical Imaging
    |December 20, 2015
    PubMed
    Summary

    This study introduces a faster statistical image reconstruction method for X-ray CT scans. The new relaxed algorithm significantly speeds up image reconstruction, enabling lower X-ray doses without compromising quality.

    Area of Science:

    • Medical Imaging
    • Computational Imaging
    • Image Reconstruction

    Background:

    • Statistical image reconstruction (SIR) methods offer reduced X-ray dose potential in CT imaging.
    • Current SIR methods face challenges due to long reconstruction times, limiting practical application.
    • Over-relaxation is a known technique to accelerate iterative optimization algorithms.

    Purpose of the Study:

    • To develop an accelerated SIR method for X-ray CT.
    • To investigate the efficacy of a novel relaxed linearized augmented Lagrangian (AL) method.
    • To improve the speed of CT image reconstruction while maintaining image quality.

    Main Methods:

    • Proposed a relaxed linearized augmented Lagrangian (AL) method incorporating over-relaxation.
    • Applied the method to X-ray computed tomography (CT) image reconstruction.

    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

    10.4K
    Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis
    06:56

    Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

    Published on: September 22, 2023

    1.8K

    Related Experiment Videos

    Last Updated: Mar 28, 2026

    X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
    08:30

    X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

    Published on: September 11, 2011

    15.0K
    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

    10.4K
    Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis
    06:56

    Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

    Published on: September 22, 2023

    1.8K
  • Utilized ordered-subsets (OS) acceleration in conjunction with the proposed algorithm.

    • Main Results:

    • The proposed relaxed algorithm demonstrated a theoretically faster convergence rate.
    • Experimental results showed the algorithm is approximately twice as fast as existing unrelaxed methods.
    • Negligible computational and memory overhead was observed with the relaxed approach.

    Conclusions:

    • The relaxed linearized AL method effectively accelerates SIR for X-ray CT.
    • This acceleration allows for faster image acquisition, potentially enabling lower radiation doses.
    • The method shows promise for practical implementation in clinical CT settings.