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 Experiment Videos

Gradient preemphasis calibration in diffusion-weighted echo-planar imaging.

N G Papadakis1, K M Martin, J D Pickard

  • 1Wolfson Brain Imaging Centre, University of Cambridge, Cambridge, UK.

Magnetic Resonance in Medicine
|October 12, 2000
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Combining EBV DNA dynamics with RECIST-based radiographic response to improve prognostic stratification of recurrent/metastatic nasopharyngeal carcinoma in the era of immunotherapy.

Rhinology·2026
Same author

Advances in tooth agenesis and tooth regeneration.

Regenerative therapy·2023
Same author

[Gd-EOB-DTPA MRI features of hepatic inflammatory pseudotumor-like follicular dendritic cell sarcoma: a case report].

Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology·2022
Same author

[Bivariate heritability estimation of resting heart rate and common chronic disease based on extended pedigrees].

Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences·2020
Same author

[Fujian Tulou Family Cohort Study: study design and characteristics of participants and pedigrees in baseline investigation].

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi·2018
Same author

[The relationship between nutritional status and oxidative stress markers, pulmonary function in patients with stable chronic obstructive pulmonary disease].

Zhonghua jie he he hu xi za zhi = Zhonghua jiehe he huxi zazhi = Chinese journal of tuberculosis and respiratory diseases·2017
Same journal

Suppression of Oscillation and Ghosting in RF-Spoiled Gradient-Echo-Based Dynamic Imaging.

Magnetic resonance in medicine·2026
Same journal

A Simple, Dynamic Geometric Phantom for MRI and CT Reconstruction Pipelines: Beyond Shepp-Logan.

Magnetic resonance in medicine·2026
Same journal

7T 3D-EPI PCASL With High SNR Efficiency and Robustness to Through-Plane B<sub>0</sub> Field Gradients.

Magnetic resonance in medicine·2026
Same journal

A Comparison of Tissue Property Values Estimated Using Conventional Cardiac MRF and MT-Cardiac MRF.

Magnetic resonance in medicine·2026
Same journal

Dependence of the Extra-Cellular Diffusion Coefficient on the Fractions of Neurites and Cell Bodies in Gray Matter.

Magnetic resonance in medicine·2026
Same journal

Triple-Pulse <sup>23</sup>Na MRI Sequence (TriNa) for Simultaneous Acquisition of Spin-Density-Weighted and Fluid-Attenuated Images.

Magnetic resonance in medicine·2026
See all related articles

This study introduces a fast, objective method for preemphasis calibration in diffusion-weighted spin-echo echo-planar imaging (DW-SE-EPI). The technique effectively eliminates eddy-current distortions, improving image quality without complex modifications.

Area of Science:

  • Magnetic Resonance Imaging
  • Image Processing
  • Medical Physics

Background:

  • Echo-planar imaging (EPI) is susceptible to image distortions caused by eddy currents.
  • Accurate preemphasis calibration is crucial for minimizing these distortions, especially in diffusion-weighted spin-echo EPI (DW-SE-EPI).
  • Existing correction techniques often involve complex modifications or additional scans.

Purpose of the Study:

  • To develop a fast and objective method for pulse-sequence-specific preemphasis calibration.
  • To reduce eddy-current-induced image distortions in DW-SE-EPI.
  • To provide a simpler alternative to existing correction methods.

Main Methods:

  • A k-space measurement technique was employed for preemphasis calibration.
  • The method was applied to single-shot DW-SE-EPI sequences.

Related Experiment Videos

  • Standard pulse sequences and system hardware were utilized.

    • Main Results:

    • The method achieved fast and objective pulse-sequence-specific preemphasis calibration.
    • Eddy-current fields were reduced to a negligible level.
    • Adjustment of the slow time-base effectively eliminated image distortions in DW-SE-EPI and diffusion tensor maps.
    • The technique was validated in phantom and human brain imaging.

    Conclusions:

    • The developed method offers an efficient and straightforward approach to preemphasis calibration for DW-SE-EPI.
    • It effectively mitigates eddy-current-induced phase shifts, leading to improved image quality.
    • This technique simplifies distortion correction, making other complex methods redundant.