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Related Experiment Video

Updated: Jan 17, 2026

Thermal Ablation for the Treatment of Abdominal Tumors
07:16

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Interventional High Monoenergetic Spectral CT for Percutaneous Thermal Ablation Procedures.

Ahmad Parvinian1, Nathan R Huber1,2, Rebecca Hibbert1

  • 1Department of Radiology, Mayo Clinic, Rochester, MN.

Journal of Computer Assisted Tomography
|September 15, 2025
PubMed
Summary

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Spectral CT using high monoenergetic (MonoE) imaging significantly reduces metal artifacts during percutaneous thermal ablation compared to conventional CT. This technique offers clinical preference for improved image guidance, especially near critical structures.

Area of Science:

  • Medical Imaging
  • Radiology
  • Interventional Radiology

Background:

  • Percutaneous thermal ablation requires precise image guidance.
  • Metal artifacts from ablation probes can obscure critical structures on conventional CT images.
  • Spectral CT offers advanced capabilities for artifact reduction.

Purpose of the Study:

  • To assess the clinical utility of spectral CT for image guidance in percutaneous thermal ablation.
  • To investigate the effectiveness of high monoenergetic (MonoE) spectral CT imaging in reducing metal artifacts.
  • To compare MonoE spectral CT with conventional CT for ablation probe visualization.

Main Methods:

  • A phantom study quantified metal artifacts using conventional and MonoE spectral CT (CCT).
  • Reader studies with 10 patient cases involved radiologists selecting optimal MonoE settings and rating image quality.
Keywords:
dual-energy CTinterventional oncologymetal artifactthermal ablation

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  • Likert scores were used to evaluate radiologist preference for MonoE versus conventional CCT.

    • Main Results:

    • High MonoE spectral CT (150 keV) reduced metal artifacts by 63% compared to conventional CCT.
    • Radiologists preferred MonoE settings around 151 keV.
    • A mean Likert score of 1.2 indicated a preference for MonoE spectral CT, particularly when the probe was near critical structures.

    Conclusions:

    • High MonoE spectral CT is clinically preferred over conventional CCT for percutaneous thermal ablation.
    • Spectral CT, at clinically feasible time frames, can effectively reduce metal artifacts while preserving soft tissue contrast.
    • The findings support the use of 150 keV spectral CT images for improved visualization during ablation procedures.