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

Intravascular magnetic resonance imaging using a loopless catheter antenna

O Ocali1, E Atalar

  • 1The Johns Hopkins University School of Medicine, Department of Radiology, Baltimore, Maryland 21287-0845, USA.

Magnetic Resonance in Medicine
|January 1, 1997
PubMed
Summary

A novel loopless intravascular catheter antenna, essential for high-signal MR imaging of small blood vessels, offers a thinner profile and simplified design. This advancement enables clearer imaging of critical arteries like the coronary arteries.

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

COVID-19 outcomes in patients with antiphospholipid syndrome: a retrospective cohort study.

Bratislavske lekarske listy·2022
Same author

Same effect of sublingual and oral captopril in hypertensive crisis.

European review for medical and pharmacological sciences·2012
Same author

Acute inferior myocardial infarction in a young female patient with polyarteritis nodosa.

Herz·2012
Same author

Acute stent thrombosis during percutaneous coronary intervention. Treatment with tirofiban.

Herz·2011
Same author

Analytic expressions for the ultimate intrinsic signal-to-noise ratio and ultimate intrinsic specific absorption rate in MRI.

Magnetic resonance in medicine·2011
Same author

Endothelial nitric oxide gene polymorphism and risk of systemic sclerosis: predisposition effect of T-786C promoter and protective effect of 27 bp repeats in Intron 4.

Clinical and experimental rheumatology·2010

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Magnetic Resonance Imaging

Background:

  • Intravascular catheter probes enhance signal-to-noise ratio (SNR) for MR imaging of blood vessels.
  • Miniaturization of catheter probes is crucial for imaging small vessels, such as coronary arteries, but faces limitations in physical dimensions and electromagnetic properties due to incorporated loops.
  • Existing catheter coils have inherent limitations that hinder effective imaging of delicate vasculature.

Purpose of the Study:

  • To propose and evaluate a loopless intravascular catheter antenna as a solution to overcome the limitations of traditional catheter coils.
  • To enable the development of significantly smaller catheter probes for improved MR imaging of small and complex blood vessels.
  • To present the theoretical basis for the design and operational principles of this novel antenna.

Related Experiment Videos

Main Methods:

  • Theoretical foundation for the design and operation of a loopless intravascular catheter antenna (based on a dipole structure) was established.
  • Development and construction of several catheter antennae with a minimal diameter of 1.5 French.
  • In-vitro testing on phantoms and in-vivo testing on rabbits were conducted to assess performance.

Main Results:

  • The loopless catheter antenna, functioning as a dipole, allows for a very thin diameter, crucial for navigating small vessels.
  • Electronic circuitry can be positioned externally without compromising antenna performance.
  • Successful construction and testing of 1.5 French catheter antennae on phantoms and rabbits demonstrated significant success.

Conclusions:

  • The loopless intravascular catheter antenna represents a breakthrough in MR imaging technology for small vessels.
  • Its simple structure facilitates easy design, implementation, and operation.
  • This innovation paves the way for enhanced visualization of critical vasculature, including coronary arteries.