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Related Experiment Videos

Hepatic lesion detection at MR imaging: a comparative study with four sequences

A Blakeborough1, J Ward, D Wilson

  • 1Department of Radiology, St James's University Hospital, Leeds, England.

Radiology
|June 1, 1997
PubMed
Summary

Superparamagnetic iron oxide-enhanced fast spin-echo (SE) magnetic resonance (MR) imaging significantly improves the detection and diagnostic accuracy of focal liver lesions compared to other sequences. This advanced MR imaging technique offers superior results for identifying hepatic abnormalities.

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Area of Science:

  • Radiology and Medical Imaging
  • Hepatobiliary Imaging
  • Oncologic Imaging

Background:

  • Accurate detection of focal hepatic lesions is crucial for patient management, particularly in oncology.
  • Various magnetic resonance (MR) imaging sequences are employed for liver lesion characterization.
  • Superparamagnetic iron oxide (SPIO) particles enhance MR imaging contrast by altering T2 relaxation times.

Purpose of the Study:

  • To evaluate and compare the efficacy of different MR imaging sequences in detecting focal hepatic lesions.
  • Specifically, to assess fast spin-echo (SE) before and after SPIO administration, fat-suppressed T2-weighted SE, and dynamic gadolinium-enhanced fast low-angle shot (FLASH).

Main Methods:

  • A cohort of 26 patients with known malignancy and focal liver lesions underwent 1.0-T MR imaging.

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  • Four independent, blinded observers reviewed all imaging sequences.
  • Sensitivity was quantified using alternative-free-response receiver operating characteristic (ROC) methods.

    • Main Results:

    • SPIO-enhanced fast SE demonstrated a significantly higher mean area under the ROC curve (0.85) compared to all other sequences (P < .02).
    • Detection of all focal liver lesions was significantly improved with SPIO-enhanced fast SE versus dynamic gadolinium-enhanced FLASH (P < .002).
    • Diagnostic performance for malignant lesions was markedly superior with SPIO-enhanced fast SE (P < .0002).

    Conclusions:

    • SPIO-enhanced fast SE MR imaging provides superior detection of focal liver lesions.
    • This sequence exhibits the highest diagnostic accuracy among the evaluated MR imaging techniques for hepatic lesions.
    • The findings support the clinical utility of SPIO-enhanced fast SE for improved liver lesion characterization.