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Related Experiment Videos

Quantitative MR renography using a calibrated internal signal (ERETIC).

F Franconi1, C Chapon, L Lemaire

  • 1SCAS, Université d'Angers, France. florence.franconi@univ-angers.fr

Magnetic Resonance Imaging
|December 7, 2002
PubMed
Summary

The Electronic Reference To access In vivo Concentrations (ERETIC) method offers precise kidney MRI signal measurement. It provides a stable, adjustable electronic reference, improving accuracy over traditional methods.

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Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)
  • Renal Physiology

Background:

  • Accurate MR renograms require correcting for MRI system variations.
  • Quantitative signal measurement in kidney MRI necessitates a reliable reference signal.
  • Existing reference methods have limitations in adjustability and space within the magnet.

Purpose of the Study:

  • To evaluate the Electronic Reference To access In vivo Concentrations (ERETIC) method for MR renography.
  • To compare the precision of ERETIC against external reference methods.
  • To highlight the advantages of ERETIC for in vivo MRI applications.

Main Methods:

  • The ERETIC method synthesizes an electronic reference signal using amplitude-modulated RF pulses during MRI acquisition.

Related Experiment Videos

  • Cortical and medullary kidney signal intensity was monitored post-contrast injection.
  • ERETIC's precision was compared to an external tube reference method.

    • Main Results:

    • The ERETIC method demonstrated precision comparable to the external tube reference.
    • ERETIC offers significant advantages, including free adjustability to organ characteristics and no space requirement within the magnet.
    • Despite intrinsic stability, ERETIC signals are affected by system variations, similar to real NMR signals.

    Conclusions:

    • ERETIC is a precise and advantageous method for quantitative signal measurement in kidney MRI.
    • Its flexibility and ease of implementation on two-RF-channel systems make it a valuable tool for MR renography.
    • ERETIC provides a robust alternative for improving the accuracy of dynamic contrast-enhanced MRI studies.