Performance analysis of a dedicated breast MR-HIFU system for tumor ablation in breast cancer patients

R. Deckers*, L. G. Merckel, B. Denis de Senneville, G. Schubert, M. Koehler, F.M. Knuttel, W.P.Th.M. Mali, C. T. W. Moonen, Maurice van den Bosch, L. W. Bartels

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

MR-guided HIFU ablation is a promising technique for the non-invasive treatment of breast cancer. A phase I study was performed to assess the safety and treatment accuracy and precision of MR-HIFU ablation in breast cancer patients (n = 10) using a newly developed MR-HIFU platform dedicated to applications in the breast. In this paper a technical analysis of the performance of the dedicated breast MR-HIFU system during breast tumors ablation is described. The main points of investigation were the spatial targeting accuracy and precision of the system and the performance of real-time respiration-corrected MR thermometry.

The mean targeting accuracy was in the range of 2.4-2.6 mm, whereas the mean targeting precision was in the range of 1.5-1.8 mm. To correct for respiration-induced magnetic field fluctuations during MR temperature mapping a look-up-table (LUT)-based correction method was used. An optimized procedural sedation protocol in combination with the LUT-based correction method allowed for precise MR thermometry during the ablation procedure (temperature standard deviation

Original languageEnglish
Pages (from-to)5527-5542
Number of pages16
JournalPhysics in Medicine and Biology
Volume60
Issue number14
DOIs
Publication statusPublished - 21 Jul 2015

Keywords

  • high intensity focused ultrasound
  • thermometry
  • breast cancer
  • MRI
  • FOCUSED ULTRASOUND SURGERY
  • CONTRAST-ENHANCED MRI
  • 20-YEAR FOLLOW-UP
  • RADIOFREQUENCY ABLATION
  • THERMOMETRY
  • THERAPY
  • US
  • FEASIBILITY
  • MAMMOGRAPHY
  • TISSUE

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