使用菲茨帕特里克尺度的光学表面监测系统的灵敏度响应分析:一个幻象研究
Rakesh Kapoor1, Aarti Jamwal1, Gaganpreet Singh2
1Department of Radiotherapy and Clinical Oncology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Advances in radiation oncology
|September 27, 2024
概括
在放射治疗中,光学表面监测系统 (OSMS) 需要针对不同肤色调整灵敏度. 较深色肤色需要更高的参数,可能会影响准确性和可靠性.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 生物医学工程 生物医学工程
背景情况:
- 光学表面监测系统 (OSMS) 在放射治疗中对实时患者表面监测至关重要.
- 表面导向辐射疗法 (SGRT) 提高了治疗的准确性和有效性.
- 评估不同患者群体的OSMS性能至关重要.
研究的目的:
- 为了评估OSMS在各种人体皮肤色调中的摄像头灵敏度.
- 用菲茨帕特里克尺度进行标准化评估,对皮肤色调进行分类.
- 用幻影来确定皮肤色调对OSMS性能的影响.
主要方法:
- 使用了催化剂和哨兵OSMSs与阿尔德森兰多幻影.
- 把幻影包裹在18块棉布上,与菲茨帕特里克和·卢尚的尺度相匹配.
- 通过在不同的光线条件下调整值/增益和集成时间来优化相机的灵敏度.
主要成果:
- OSMS检测到幻面的整合时间从550微秒到12,000微秒不等.
- 较浅的皮肤色调需要更短的整合时间和更低的增益/值.
- 较深的肤色需要更高的参数,但过高的值会损害系统的可靠性和准确性.
结论:
- 为了准确地监测表面,必须将OSMS灵敏度参数定制为个别的皮肤色调.
- 对于更深色肤色的更高的参数可以降低系统可靠性并引入噪音.
- 对于肤色较深的患者,可能需要使用其他图像指导方法.
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