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

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

10.3K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
10.3K
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

357
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
357
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

1.1K
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...
1.1K

You might also read

Related Articles

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

Sort by
Same author

Percutaneous cholangioscopic laser removal of intraductal suture causing recurrent intrahepatic cholelithiasis.

Journal of vascular and interventional radiology : JVIR·2026
Same author

Diagnostic Ultrasound-guided Focused Ultrasound-induced Noninvasive, Reversible Peripheral Nerve Blockade in an In Vivo Model of Acute Pain: A Proof-of-Concept Study.

Anesthesiology·2026
Same author

Safety and efficacy of staged, bilateral magnetic resonance-guided focused ultrasound pallidothalamic tractotomy for motor complications of Parkinson's disease: a prospective, multicentre, single-arm trial.

The Lancet. Neurology·2026
Same author

Noninvasive Diagnostic Ultrasound-Guided Focused Ultrasound Enables Selective, Reversible Inhibition of Peripheral Nociceptive Fibers and Prevents Acute Pain.

bioRxiv : the preprint server for biology·2026
Same author

Enhancing foundation model transfer for prostate cancer detection with patch-level contrastive learning.

NPJ digital medicine·2026
Same author

Second-Line Radiation Therapy for Locally Recurrent Prostate Cancer After Focal Therapy: A Single Institution Matched-Pair Analysis.

Clinical genitourinary cancer·2026

Related Experiment Video

Updated: Mar 24, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
09:02

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

1.8K

Improved cortical bone specificity in UTE MR Imaging.

Ethan M Johnson1, Urvi Vyas1, Pejman Ghanouni1

  • 1Magnetic Resonance Systems Research Laboratory, Department of Electrical Engineering, Stanford University, Stanford, California, USA.

Magnetic Resonance in Medicine
|March 15, 2016
PubMed
Summary

New MRI techniques visualize compact bone with positive contrast, enhancing MR-guided procedures. This method improves bone imaging specificity by tuning radiofrequency pulses to relaxation rates, offering CT-like contrast.

Keywords:
MR image-guided radiation therapyMR-guided focused ultrasound planningMR/PET attenuation correctionbone MRIultrashort echo timezero echo time

More Related Videos

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
07:10

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

5.6K
Hybrid µCT-FMT imaging and image analysis
13:45

Hybrid µCT-FMT imaging and image analysis

Published on: June 4, 2015

13.7K

Related Experiment Videos

Last Updated: Mar 24, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
09:02

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population

Published on: January 31, 2025

1.8K
A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT
07:10

A Sectioning, Coring, and Image Processing Guide for High-Throughput Cortical Bone Sample Procurement and Analysis for Synchrotron Micro-CT

Published on: June 12, 2020

5.6K
Hybrid µCT-FMT imaging and image analysis
13:45

Hybrid µCT-FMT imaging and image analysis

Published on: June 4, 2015

13.7K

Area of Science:

  • Medical Imaging
  • Biophysics
  • Magnetic Resonance Imaging

Background:

  • Direct visualization of compact bone using MRI is crucial for MR-informed technologies like MR-guided focused ultrasound, MR-PET reconstruction, and MR-guided radiation therapy.
  • Improving the specificity of bone imaging requires enhanced sensitivity to Bloch relaxation phenomena to differentiate bone from other tissues.

Purpose of the Study:

  • To develop and demonstrate MRI methods for direct visualization of compact bone with positive contrast.
  • To improve the specificity of bone imaging by manipulating image sensitivity to Bloch relaxation phenomena.

Main Methods:

  • Utilizing Bloch equation dynamics to identify excitation pulses sensitive to short-T2 magnetization from cortical bone.
  • Employing a UTE (ultrashort echo time) subtraction sequence with tailored RF excitation pulses for MR imaging of compact bone.
  • Quantifying contrast similarity by comparing MR signal intensities with CT Hounsfield units in skull imaging.

Main Results:

  • MR images of bone structures were acquired with positive contrast, similar to X-ray CT images.
  • The similarity in contrast between MR and CT was quantified using skull imaging.
  • The MR technique was successfully demonstrated in various anatomical regions relevant for interventional procedures, including the shoulder, pelvis, and leg.

Conclusions:

  • Matching radiofrequency excitation pulses to relaxation rates significantly enhances the specificity of short-T2 contrast for bone.
  • The developed UTE sequence enables the acquisition of cortical bone images with positive contrast, validated against X-ray CT.
  • This advancement offers improved MR imaging capabilities for bone, beneficial for various clinical applications.