Department of Interventional Neuroradiology, Hospital Clínico Universitario San Carlos, 28040, Madrid, Spain.
Department of Radiology, Hospital Clínico Universitario San Carlos, Madrid, Spain.
Eur Radiol. 2024 Aug;34(8):5167-5178. doi: 10.1007/s00330-023-10431-7. Epub 2023 Nov 11.
OBJECTIVES: Magnetic resonance-guided focused ultrasound (MRgFUS) thalamotomy is a novel, minimally invasive ablative treatment for essential tremor (ET). The use of a four-tract probabilistic tractography technique, targeting the intersection between the dentato-rubro-thalamic tracts (both decussating and non-decussating), while evaluating the corticospinal tract and the medial lemniscus, may obtain immediate clinical results with reduced adverse events. Our aim is to present our experience with the four-tract technique for patients undergoing ET treatment with MRgFUS. METHODS: Retrospective analysis of a prospective database of consecutive patients undergoing ET treatment in a single center from February 2022 to February 2023. Procedural parameters were collected, and tremor improvement was assessed with the Clinical Rating Scale for Tremor (CRST) at baseline and at 3 and 6 months. Adverse events were also reported. RESULTS: Forty-three patients (median age, 72 years [interquartile range, 66-76]; 22 females) were evaluated. Tremor improved significatively in all CRST subsections at 3 months, including the CRST part A + B treated hand tremor (22 [19-27] vs 4 [2-7], p < 0.001) and CRST part C (16 [13-19] vs 3 [1-4], p < 0.001). Differences persisted significant at 6 months. Adverse events were few (4.1% of paresthesias and 12.5% of objective gait disturbance at follow-up) and recorded as mild. The median number of sonications was 7 [6-8] and mean operative time 68.7 ± 24.2 min. CONCLUSION: Our data show support for the feasibility and benefits of systematic targeting approach with four-tract probabilistic tractography for treating ET using MRgFUS. CLINICAL RELEVANCE STATEMENT: An approach with four-tract probabilistic tractography for treating essential tremor (ET) patients with magnetic resonance-guided focused ultrasound decreases interindividual variability with good clinical outcomes, low number of sonications, few adverse effects, and short procedure times. KEY POINTS: • The optimal target for the treatment of essential tremor with MR-guided focused ultrasound remains unknown. • Four-tract probabilistic tractography is a feasible technique that reduces interindividual variability, with good clinical results, few side effects, and short operative time. • The four-tract tractography approach can be performed using different MRI scanners and post-processing software in comparison with the initial description of the technique.
目的:磁共振引导聚焦超声(MRgFUS)丘脑切开术是一种治疗原发性震颤(ET)的新型微创消融治疗方法。使用针对齿状核-红核-丘脑束交叉和非交叉交点的四通道概率性轨迹技术,同时评估皮质脊髓束和内侧丘系,可能会获得即时的临床效果,并减少不良事件。我们的目的是介绍我们在使用磁共振引导聚焦超声治疗 ET 患者中使用四通道技术的经验。
方法:对 2022 年 2 月至 2023 年 2 月在单中心接受 ET 治疗的连续患者前瞻性数据库进行回顾性分析。收集手术参数,并在基线和 3 个月和 6 个月时使用震颤临床评分量表(CRST)评估震颤改善情况。还报告了不良事件。
结果:评估了 43 名患者(中位年龄 72 岁[四分位距 66-76];22 名女性)。所有 CRST 亚组在 3 个月时震颤均有显著改善,包括 CRST 部分 A+B 治疗手震颤(22[19-27]比 4[2-7],p<0.001)和 CRST 部分 C(16[13-19]比 3[1-4],p<0.001)。6 个月时差异仍有统计学意义。不良事件较少(随访时 4.1%的感觉异常和 12.5%的客观步态障碍),且记录为轻度。超声治疗的中位数为 7[6-8]次,平均手术时间为 68.7±24.2 分钟。
结论:我们的数据支持使用四通道概率性轨迹技术对 ET 进行系统靶向治疗的可行性和益处,该技术使用磁共振引导聚焦超声。
临床相关性声明:使用磁共振引导聚焦超声治疗原发性震颤(ET)患者的四通道概率性轨迹技术可降低个体间变异性,获得良好的临床效果,较少的超声治疗次数,较少的不良影响和较短的手术时间。
关键点:
Neurosurg Focus. 2018-2
Front Neurol. 2021-6-18
AJNR Am J Neuroradiol. 2020-8-13
J Neurol Neurosurg Psychiatry. 2020-9
Neuroimage. 2020-3