Skip to main content
Advertisement

Main menu

  • Home
  • Content
    • Current Issue
    • Publication Preview--Ahead of Print
    • Past Issue Archive
    • Case of the Week Archive
    • Classic Case Archive
    • Case of the Month Archive
  • For Authors
  • About Us
    • About AJNR
    • Editors
    • American Society of Neuroradiology
  • Submit a Manuscript
  • Podcasts
    • Subscribe on iTunes
    • Subscribe on Stitcher
  • More
    • Subscribers
    • Permissions
    • Advertisers
    • Alerts
    • Feedback
  • Other Publications
    • ajnr

User menu

  • Subscribe
  • Alerts
  • Log in

Search

  • Advanced search
American Journal of Neuroradiology
American Journal of Neuroradiology

American Journal of Neuroradiology

  • Subscribe
  • Alerts
  • Log in

Advanced Search

  • Home
  • Content
    • Current Issue
    • Publication Preview--Ahead of Print
    • Past Issue Archive
    • Case of the Week Archive
    • Classic Case Archive
    • Case of the Month Archive
  • For Authors
  • About Us
    • About AJNR
    • Editors
    • American Society of Neuroradiology
  • Submit a Manuscript
  • Podcasts
    • Subscribe on iTunes
    • Subscribe on Stitcher
  • More
    • Subscribers
    • Permissions
    • Advertisers
    • Alerts
    • Feedback
  • Follow AJNR on Twitter
  • Visit AJNR on Facebook
  • Follow AJNR on Instagram
  • Join AJNR on LinkedIn
  • RSS Feeds
LetterLETTER

High-Pass-Filtered Phase Image: Left- versus Right-Handed MR Imaging Systems

T.M. Mehemed and A. Yamamoto
American Journal of Neuroradiology June 2013, 34 (6) E72; DOI: https://doi.org/10.3174/ajnr.A3571
T.M. Mehemed
aDepartment of Diagnostic Imaging and Nuclear Medicine Kyoto University Graduate School of Medicine Kyoto, Japan
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
A. Yamamoto
aDepartment of Diagnostic Imaging and Nuclear Medicine Kyoto University Graduate School of Medicine Kyoto, Japan
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • Article
  • Info & Metrics
  • References
  • PDF
Loading

We read with interest the article entitled “Detection of Intratumoral Calcification in Oligodendrogliomas by Susceptibility-Weighted MR Imaging”1 and would like to comment on the appearance of calcification on the high-pass-filtered phase images.

The authors reported that the paramagnetic (authors wrote “diamagnetic”) hemorrhagic component of the tumor would cause a negative phase shift and appear as dark signal on the high-pass-filtered phase images, while the diamagnetic (authors wrote “paramagnetic”) intratumoral calcifications would cause an opposite positive phase shift and appear as bright signal on the high-pass-filtered phase images. This description is true, but only in the case of right-handed MR imaging systems, while in left-handed MR imaging systems, the complete opposite signal would be seen: Paramagnetic substances would appear bright, while diamagnetic substances would appear dark.2,3

In Figs 2D and 3D of the above-mentioned article, the high-pass-filtered phase images are those of a left-handed MR imaging system, evident by the bright signal of the veins (paramagnetic deoxyhemoglobin).3

The article showed that high-pass-filtered phase images can depict intratumoral calcification in oligodendrogliomas better than conventional MR images; this finding has been reported before.4 Understanding the contrast appearance of high-pass-filtered phase images on left-handed versus right-handed MR imaging systems would make distinguishing diamagnetic calcification from paramagnetic hemorrhage a much easier task and prevent any possible confusion.

REFERENCES

  1. 1.↵
    1. Zulfiqar M,
    2. Dumrongpisutikul N,
    3. Intrapiromkul J,
    4. et al
    . Detection of intratumoral calcification in oligodendrogliomas by susceptibility-weighted MR imaging. AJNR Am J Neuroradiol 2012;33:858–64
    Abstract/FREE Full Text
  2. 2.↵
    1. Haacke EM,
    2. Reichenbach JR
    1. Duyn J,
    2. Speck O
    . Brain Anatomy with Phase. In: Haacke EM, Reichenbach JR. Susceptibility Weighted Imaging in MRI: Basic Concepts and Clinical Applications. Hoboken, New Jersey: John Wiley & Sons; 2011:121–36
  3. 3.↵
    1. Haacke EM,
    2. Reichenbach JR
    1. Mittal S,
    2. Thomas B,
    3. Wu Z,
    4. et al
    . Novel approaches to imaging brain tumors. In: Haacke EM, Reichenbach JR. Susceptibility Weighted Imaging in MRI: Basic Concepts and Clinical Applications. Hoboken, New Jersey: John Wiley & Sons; 2011:151–70
  4. 4.↵
    1. Wu Z,
    2. Mittal S,
    3. Kish K,
    4. et al
    . Identification of calcification with MRI using susceptibility-weighted imaging: a case study. J Magn Reson Imaging 2009;29:177–82
    CrossRefPubMed
  • © 2013 by American Journal of Neuroradiology
PreviousNext
Back to top

In this issue

American Journal of Neuroradiology: 34 (6)
American Journal of Neuroradiology
Vol. 34, Issue 6
1 Jun 2013
  • Table of Contents
  • Index by author
Advertisement
Print
Download PDF
Email Article

Thank you for your interest in spreading the word on American Journal of Neuroradiology.

NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.

Enter multiple addresses on separate lines or separate them with commas.
High-Pass-Filtered Phase Image: Left- versus Right-Handed MR Imaging Systems
(Your Name) has sent you a message from American Journal of Neuroradiology
(Your Name) thought you would like to see the American Journal of Neuroradiology web site.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Citation Tools
High-Pass-Filtered Phase Image: Left- versus Right-Handed MR Imaging Systems
T.M. Mehemed, A. Yamamoto
American Journal of Neuroradiology Jun 2013, 34 (6) E72; DOI: 10.3174/ajnr.A3571

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero
Share
High-Pass-Filtered Phase Image: Left- versus Right-Handed MR Imaging Systems
T.M. Mehemed, A. Yamamoto
American Journal of Neuroradiology Jun 2013, 34 (6) E72; DOI: 10.3174/ajnr.A3571
del.icio.us logo Digg logo Reddit logo Twitter logo Facebook logo Google logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One
Purchase

Jump to section

  • Article
    • REFERENCES
  • Info & Metrics
  • References
  • PDF

Related Articles

  • No related articles found.
  • PubMed
  • Google Scholar

Cited By...

  • No citing articles found.
  • Crossref
  • Google Scholar

This article has not yet been cited by articles in journals that are participating in Crossref Cited-by Linking.

More in this TOC Section

  • Pattern Recognition in Mitochondrial Leukodystrophies is Hampered by the Peculiarities of Mitochondrial Genetics
  • Callosal Angle Narrowing in Research Data Bases of the Cognitively Impaired
  • Reply:
Show more Letters

Similar Articles

Advertisement

News and Updates

  • Lucien Levy Best Research Article Award
  • Thanks to our 2021 Distinguished Reviewers
  • Press Releases

Resources

  • Evidence-Based Medicine Level Guide
  • How to Participate in a Tweet Chat
  • AJNR Podcast Archive
  • Ideas for Publicizing Your Research
  • Librarian Resources
  • Terms and Conditions

Opportunities

  • Share Your Art in Perspectives
  • Get Peer Review Credit from Publons
  • Moderate a Tweet Chat

American Society of Neuroradiology

  • Neurographics
  • ASNR Annual Meeting
  • Fellowship Portal
  • Position Statements

© 2022 by the American Society of Neuroradiology | Print ISSN: 0195-6108 Online ISSN: 1936-959X

Powered by HighWire