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Related Experiment Videos

Is postcontrast trueFISP imaging advantageous?

Bettina Jung1, Gabriele A Krombach, Rolf W Günther

  • 1Department of Diagnostic Radiology, University of Technology, Aachen, Germany. jung@rad.rwth-aachen.de

Investigative Radiology
|August 17, 2004
PubMed
Summary
This summary is machine-generated.

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Contrast-enhanced trueFISP MRI improves signal intensity for many abdominal organs and solid lesions. However, contrast for cysts decreased, suggesting trueFISP imaging is beneficial both before and after contrast administration.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Radiology
  • Medical Imaging

Background:

  • True fast imaging with steady-state precession (trueFISP) MRI contrast is primarily influenced by the T2/T1 ratio.
  • Paramagnetic contrast agents can enhance signal intensity in T2-weighted sequences like trueFISP.
  • Assessing the impact of contrast agents on trueFISP abdominal imaging is crucial for diagnostic accuracy.

Purpose of the Study:

  • To analyze signal intensities in abdominal organs following contrast medium administration using trueFISP sequences.
  • To determine if contrast-enhanced trueFISP imaging improves contrast for pathologies compared to precontrast scans.

Main Methods:

  • Fifty patients underwent abdominal MRI including trueFISP sequences before and after contrast administration on a 1.5 T system.

Related Experiment Videos

  • Signal-to-noise ratio (SNR) was measured for organs, vessels, muscle, and fat.
  • Contrast-to-noise ratio (CNR) was calculated for pathologic lesions.

    • Main Results:

    • Post-contrast trueFISP sequences showed increased SNR in most abdominal organs, excluding fat and the aorta.
    • Contrast-to-noise ratio (CNR) improved for solid lesions such as angiomyolipoma, liver adenoma, hemangioma, and hepatocellular carcinoma.
    • Contrast enhancement for cystic lesions was reduced after contrast administration.

    Conclusions:

    • Contrast-enhanced trueFISP MRI enhances CNR for numerous solid abdominal pathologies.
    • Cystic lesions exhibit decreased contrast with trueFISP after contrast administration.
    • TrueFISP imaging is recommended both pre- and post-contrast for comprehensive abdominal assessment.