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对于视网膜激光治疗的模型预测温度控制

Viktoria Kleyman1, Sophie Eggert2, Christian Schmidt3

  • 1Leibniz University Hannover, Institute of Automatic Control, Hannover, Germany.

Translational vision science & technology
|September 27, 2024
PubMed
概括

在视网膜激光疗法中,自动闭环温度控制可确保治疗的一致性,并降低过量或不足治疗的风险. 这种先进的方法提高了各种眼睛疾病的安全性和有效性.

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科学领域:

  • 眼科医生 眼科 眼科
  • 生物医学工程 生物医学工程
  • 控制系统 控制系统

背景情况:

  • 在视网膜疗法中,手动激光功率调整是不精确的,导致治疗效果变化和过度/不足治疗的预防有限.
  • 照射点的恒定温度对于低损伤的高热治疗和安全的光凝固至关重要,特别是短时间的曝光时间.

研究的目的:

  • 为了证明视网膜激光治疗中自动闭环温度控制的好处.
  • 通过对猪眼部实验物的广泛实验来验证控制策略.

主要方法:

  • 使用模型预测控制器,以确保安全可靠的温度升高.
  • 使用扩展卡尔曼波器 (EKF) 实时估计温度和点依赖吸收系数,使用光声学测量.
  • 验证了使用光活力染色来测量损伤大小的控制策略.

主要成果:

  • 该EKF通过将病变大小与细胞死亡温度值相关联,准确地估计了峰值温度.
  • 闭环控制方案实现了连续的损伤大小,尽管吸收率有所不同,与开环控制相比,显示变异性减少.

结论:

  • 开发的闭环控制方法在视网膜激光疗法中促进了安全的亚损伤性治疗.
  • 这种方法显著降低了在轻度凝血过程中过量或过少处理的风险.