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 language | English |
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Pages (from-to) | 5527-5542 |
Number of pages | 16 |
Journal | Physics in Medicine and Biology |
Volume | 60 |
Issue number | 14 |
DOIs | |
Publication status | Published - 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