经典的两针 IRE 设置与单针原型的温度分布
Ali Jouni1, Marco Baragona2, Federico Pedersoli3
1University Hospital RWTH Aachen, Clinic for Diagnostic and Interventional Radiology, Aachen, Germany.
Technology in cancer research & treatment
|October 23, 2024
概括
对不可逆电穿孔 (IRE) 治疗的新原型显示出改善肝脏瘤治疗的潜力. 这种设计将热效应定位在瘤内,与传统方法不同,提高了周围组织的安全性.
科学领域:
- 医学物理 医学物理
- 在瘤学瘤学.
- 生物医学工程 生物医学工程
背景情况:
- 不可逆的电穿孔 (IRE) 是一种用于治疗肝脏瘤的非热性癌症疗法.
- 在IRE过程中产生的热量需要仔细分析,以防止对敏感结构造成损害.
- 优化热量分配对于最大限度地提高治疗效果和最大限度地减少附带热损伤至关重要.
研究的目的:
- 为了比较一款新型单针,多电极IRE原型与标准的双平行针设置的热分布.
- 为了评估在肝脏瘤治疗中由不同的IRE电极配置产生的热效应和亡模式.
主要方法:
- 在COMSOL Multiphysics中使用数值模拟来分析两种电极设置的温度分布.
- 在IRE处理过程中,研究了与应用器的不同距离的温度水平和分布.
- 将模拟结果与现有的体外数据进行比较以进行验证.
主要成果:
- 与两针设置 (57°C) 相比,原型产生了更高的最大平均温度 (74°C).
- 这两种配置都产生了相似的凝血死亡的厚度.
- 最重要的是,原型的缩局部在瘤内,而两针设置的缩延伸到瘤外.
结论:
- 热分布分析对于设计新的IRE电极和规划处理至关重要.
- 原型设计提供了更好的热效应在瘤位内的定位.
- 这种方法通过将周围健康组织的损伤降到最低,提高IRE治疗的安全性.
相关概念视频
Design Example: Strain Gauge Bridge or Wheatstone Bridge
356
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
356
Magnetic Field Due to Two Straight Wires
2.4K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
2.4K
Temperature Measurement Sites
1.6K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
1.6K


