We have previously presented a blood perfusion parameter by means of the spatial contrast of speckle patterns observed for blood perfusion in skin tissue and a blood vessel. This parameter permits us to visualize a relative blood perfusion distribution from a single speckle pattern. Therefore, it can estimate the blood perfusion with a frame rate of an imaging device employed. This parameter is, however, dependent on the speckle size and the condition of image processing of speckle patterns. In the present study, we estimated this condition with relation to the speckle size for obtaining high sensitivity and good linearity of the parameter to the blood perfusion. Experiments were conducted for ground-glass model, flow model and human wrist to investigate perfusion sensing characteristics of the present parameter.

我们之前已经通过观察皮肤组织和血管中的血液灌注的散斑图案的空间对比度来提出血液灌注参数。该参数使我们能够从单个散斑图案中可视化相对的血液灌注分布。因此，它可以用所采用的成像设备的帧率来估计血液灌注。然而，该参数取决于散斑大小和散斑图案的图像处理条件。在本研究中，我们估计了与散斑大小相关的这种情况，以获得对血液灌注的参数的高灵敏度和良好的线性。对毛玻璃模型、流动模型和人类手腕进行了实验，以研究当前参数的灌注传感特性。