臨床磁振導航聚焦超音波系統的位置穩定性分析:一年的經驗

Translated title of the contribution: POSITION STABILITY ANALYSIS OF A CLINICAL MRI-GUIDED FOCUSED ULTRASOUND SYSTEM: ONE-YEAR EXPERIENCE

高怡慈, 潘佳欣, 吳竟輔, 陳東河, 許芳齊, 李欣倫, 邱仲峯, 鄭秀成

Research output: Contribution to journalArticle

Abstract

Purpose : We developed a quality assurance protocol for treating painful bone metastasis with a Magnetic Resonance-guided Focused Ultrasound Surgery (MRgFUS) system. The system delivers ultrasonic energy to heat the MR-delineated metastatic bone target up to 60 degrees Celsius and ablate periosteal nerve fibers for sustained pain control. In this protocol, equipments, calibration procedures, and recommended tolerance are reported. Materials and Methods : In this research, we measured sonication-induced temperature change in a homogenous phantom before and after Daily Quality Assurance (DQA) procedure performed in thirty-one treatment sessions in a single institute. Distances between ultrasonic focus and the spot with highest temperature (Focusing Error, FE) in the phantom were measured with magnetic resonance thermography. Result : DQA procedure effectively decrease FE (Pre-DQA group: 1.73±0.43 mm, DQA group: 0.43±0.12 mm, p-value<0.01). Discussion : A comprehensive DQA procedure decreases focusing error and therefore guarantees treatment accuracy. It may translate into better patient safety and avoid unplanned heating of adjacent critical structures. We recommend that a FE of less than 1 mm should be achieved with DQA procedure before starting a MRgFUS treatment session.
Original languageTraditional Chinese
Pages (from-to)107-114
Number of pages8
Journal放射治療與腫瘤學
Volume23
Issue number2
DOIs
Publication statusPublished - 2016

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Keywords

  • MRI-guided focused ultrasound surgery (MRgFUS)
  • Daily Quality Assurance (DQA)
  • Position stability

Cite this

高怡慈, 潘佳欣, 吳竟輔, 陳東河, 許芳齊, 李欣倫, 邱仲峯, & 鄭秀成 (2016). 臨床磁振導航聚焦超音波系統的位置穩定性分析:一年的經驗. 放射治療與腫瘤學, 23(2), 107-114. https://doi.org/10.6316/TRO/201623(2)107