作者单位
摘要
1 上海理工大学,上海市介入医疗器械工程研究中心,上海 200093
2 上海理工大学机械工程学院,上海 200093
基于图像的非接触式获取脉搏波的方法具有重要的临床实用价值。在正常情况下,人体颈动脉的搏动会引起颈部皮肤肉眼可见的微小振动,通过振动图像的获取及信号处理可以得到脉搏波。然而,临床中部分患者存在颈动脉搏动较为微弱的情况,此时需要有针对性的图像和信号处理方法。本课题组提出了在弱脉搏情况下获取脉搏波的方法,即:在近红外光源的照明环境中,用近红外相机连续拍摄颈部皮肤得到其振动的图像序列;然后从图像序列的感兴趣区域内得到原始信号,再用滤波和多区域主频增强方法对信号进行处理,最终得到期望的脉搏波信号。实验结果表明,所提方法获得的脉搏波周期状态稳定,并且保留了70%左右的潮波特征和50%以上的重搏波特征。本文所提方法可以在人体颈部微弱振动状态下获得保留细节的完整的脉搏波信号。
医用光学 颈动脉 弱脉搏 脉搏波 多区域主频增强 
中国激光
2023, 50(9): 0907101
作者单位
摘要
东南大学江苏省工程力学分析重点实验室, 江苏 南京 210096
对颈动脉的脉搏波进行测量, 是对心脑血管疾病进行科学预防和保健的基础。基于改进的水转印数字散斑场, 给出了三维数字图像相关测量系统对人体颈动脉的测量方法。根据人体皮肤颜色的特殊性, 采取适用于人体不同肤色的水转印数字散斑场的散斑制作方法, 并与人体表面自然散斑场进行了对比, 证明了水转印数字散斑场更加稳定、准确和高效。通过实验给出了人体颈动脉的波形、频率等基本信息, 并对颈动脉的全表面脉搏波时域和空域变形信息进行分析, 验证了该方法的有效性。研究工作可为心脑血管疾病的防治提供一定的参考。
测量 三维数字图像相关 水转印 数字散斑场 颈动脉 
光学学报
2017, 37(3): 0312004
Author Affiliations
Abstract
1 State Key Laboratory for Multi-Spectral Information Processing Technologies Institute for Pattern Recognition and Artificial Intelligence (IPRAI) Huazhong University of Science and Technology Wuhan, 430074, Hubei, China
2 Image Processing and Intelligence Control Key Laboratory of Education Ministry of China School of Life Science and Technology Huazhong University of Science and Technology Wuhan, 430074, Hubei, China
Published 16 January 2012 Stroke and heart attack, which could be led by a kind of cerebrovascular and cardiovascular disease named as atherosclerosis, would seriously cause human morbidity and mortality. It is important for the early stage diagnosis and monitoring medical intervention of the atherosclerosis. Carotid stenosis is a classical atherosclerotic lesion with vessel wall narrowing down and accumulating plaques burden. The carotid artery of intima-media thickness (IMT) is a key indicator to the disease. With the development of computer assisted diagnosis technology, the imaging techniques, segmentation algorithms, measurement methods, and evaluation tools have made considerable progress. Ultrasound imaging, being real-time, economic, reliable, and safe, now seems to become a standard in vascular assessment methodology especially for the measurement of IMT. This review firstly attempts to discuss the clinical relevance of measurements in clinical practice at first, and then followed by the challenges that one has to face when approaching the segmentation of ultrasound images. Secondly, the commonly used methods for the IMT segmentation and measurement are presented. Thirdly, discussion and evaluation of different segmentation techniques are performed. An overview of summary and future perspectives is given finally.
Ultrasound (US) images carotid artery intima-media thickness (IMT) atherosclerosis image segmentation computer assisted diagnosis (CAD) 
Journal of Innovative Optical Health Sciences
2012, 5(1): 1230001

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