压缩传感用于偏振敏感的光学连贯性断层扫描
Jianfeng Wang1, Eric J Chaney1, Edita Aksamitiene1
1Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States of America.
压缩传感 (CS) 和稀疏采样加速了极化敏感光学连贯断层扫描 (PS-OCT) 成像. 这种方法使用50%的B扫描重建体积PS-OCT数据,有效地加倍获取速度.
科学领域:
- 生物医学光学 生物医学光学
- 医学成像技术 医学成像技术
背景情况:
- 极化敏感光学连贯断层扫描 (PS-OCT) 提供了有价值的微观结构和双断层信息.
- 获取完整的体积PS-OCT数据集需要大量的B扫描,限制成像速度.
- 压缩传感 (CS) 和稀疏采样为加速数据采集提供了潜在的解决方案.
研究的目的:
- 实施和评估压力传感 (CS) 和稀疏采样,以减少体积PS-OCT中的B扫描采集.
- 评估重建PS-OCT数据的可行性,使用显著减少B扫描.
- 确定降低B扫描速率对重建的PS-OCT测量的准确性和质量的影响.
主要方法:
- 通过随机化步骤大小沿着PS-OCT成像缓慢轴实施稀疏采样.
- 应用压力传感 (CS) 算法,从低样本B扫描中重建体积PS-OCT数据.
- 在缺失的B扫描率为25%,50%和75%的情况下,使用相关系数评估了重建的准确性.
主要成果:
- CS成功地重建了相当好的PS-OCT测量 (相关系数>0.6),即使B扫描缺失高达50%.
- 使用CS稀疏采样使得需要的B扫描数量大大减少.
- 该方法证明了加速体积PS-OCT测量的潜力,有效地使收购率翻一番.
结论:
- 压缩传感与稀疏采样相结合是加速体积PS-OCT获取的有效策略.
- 这种方法允许高质量的PS-OCT数据重建,并且大大减少了扫描时间.
- 这些发现表明,更快的体内和体外PS-OCT成像应用的可行途径.
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