Akcay A Ceyhun, Clarkson Eric, Rolland Jannick P
College of Optics and Photonics, CREOL, and the Florida Photonics Center of Excellence, University of Central Florida, Orlando, Florida 32816, USA.
Appl Opt. 2005 Dec 10;44(35):7573-80. doi: 10.1364/ao.44.007573.
We demonstrate the effect of the spectral shape of broadband light sources in a task-based approach for assessment of signal detection and resolution in optical coherence tomography. We define two binary tasks: The signal is either present or absent and the signal can be either resolved or not. In a transparent sample bounded by two uniform interfaces we study the minimum detectable change in the index of refraction as well as the minimum resolvable distance between the layers in correlation with the source spectral shape and power. Results show that the area under the receiver operating curve (AUC) for a signal-detection task is not affected by the shape of the spectrum but solely by its optical power, whereas spectral shaping has an effect, which we quantify, on the AUC for the resolution task. Moreover, the AUC is demonstrated in relation to the concept of system sensitivity for a signal-detection task.
我们采用基于任务的方法，展示了宽带光源的光谱形状在光学相干断层扫描中对信号检测和分辨率评估的影响。我们定义了两个二元任务：信号存在或不存在，以及信号能否被分辨。在由两个均匀界面界定的透明样本中，我们研究了与光源光谱形状和功率相关的最小可检测折射率变化以及各层之间的最小可分辨距离。结果表明，信号检测任务的接收器操作曲线下面积（AUC）不受光谱形状的影响，仅受其光功率的影响，而光谱整形对分辨率任务的AUC有影响，我们对这种影响进行了量化。此外，还针对信号检测任务，展示了AUC与系统灵敏度概念的关系。
