In vivo evaluation of focused ultrasound ablation surgery (FUAS)-induced coagulation using echo amplitudes of the therapeutic focused ultrasound transducer.

IF 3 3区 医学 Q2 ONCOLOGY International Journal of Hyperthermia Pub Date : 2024-01-01 Epub Date: 2024-03-04 DOI:10.1080/02656736.2024.2325477
Yufeng Zhou, Xiaobo Gong, Yaqing You
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Abstract

Objective: Monitoring sensitivity of sonography in focused ultrasound ablation surgery (FUAS) is limited (no hyperechoes in ∼50% of successful coagulation in uterine fibroids). A more accurate and sensitive approach is required.

Method: The echo amplitudes of the focused ultrasound (FUS) transducer in a testing mode (short pulse duration and low power) were found to correlate with the ex vivo coagulation. To further evaluate its coagulation prediction capabilities, in vivo experiments were carried out. The liver, kidney, and leg muscles of three adult goats were treated using clinical FUAS settings, and the echo amplitude of the FUS transducer and grayscale in sonography before and after FUAS were collected. On day 7, animals were sacrificed humanely, and the treated tissues were dissected to expose the lesion. Echo amplitude changes and lesion areas were analyzed statistically, as were the coagulation prediction metrics.

Results: The echo amplitude changes of the FUS transducer correlate well with the lesion areas in the liver (R = 0.682). Its prediction in accuracy (94.4% vs. 50%), sensitivity (92.9% vs. 35.7%), and negative prediction (80% vs. 30.8%) is better than sonography, but similar in specificity (80% vs. 100%) and positive prediction (100% vs. 100%). In addition, the correlation between tissue depth and the lesion area is not good (|R| < 0.2). Prediction performances in kidney and leg muscles are similar.

Conclusion: The FUS echo amplitudes are sensitive to the tissue properties and their changes after FUAS. They are sensitive and reliable in evaluating and predicting FUAS outcomes.

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利用治疗性聚焦超声换能器的回波振幅,对聚焦超声消融手术(FUAS)诱导的凝血过程进行体内评估。
目的:在聚焦超声消融手术(FUAS)中,超声波检查的监测灵敏度有限(子宫肌瘤成功凝固的 50% 以上无高回声)。需要一种更准确、更灵敏的方法:方法:研究发现,聚焦超声(FUS)换能器在测试模式(短脉冲持续时间和低功率)下的回声振幅与体内凝固相关。为进一步评估其凝血预测能力,进行了体内实验。使用临床 FUAS 设置对三只成年山羊的肝脏、肾脏和腿部肌肉进行治疗,并收集 FUAS 前后 FUS 传感器的回波振幅和声像图的灰度。第 7 天,对动物进行人道处死,解剖处理过的组织以暴露病变。对回波振幅变化和病变面积以及凝血预测指标进行统计分析:结果:FUS 换能器的回声振幅变化与肝脏病变区域有很好的相关性(R = 0.682)。其预测准确性(94.4% 对 50%)、敏感性(92.9% 对 35.7%)和阴性预测(80% 对 30.8%)均优于超声波检查,但特异性(80% 对 100%)和阳性预测(100% 对 100%)相似。此外,组织深度与病变面积之间的相关性并不好(|R| < 0.2)。肾脏和腿部肌肉的预测性能相似:结论:FUS回波振幅对组织特性及其在FUAS后的变化很敏感。结论:FUS 回波振幅对组织特性及其在 FUAS 后的变化很敏感,在评估和预测 FUAS 结果方面灵敏可靠。
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来源期刊
CiteScore
5.90
自引率
12.90%
发文量
153
审稿时长
6-12 weeks
期刊介绍: The International Journal of Hyperthermia
期刊最新文献
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