Real‐time measurement of repetitive micro bulk motion vector and motion noise removal in optical coherence tomography angiography,Journal of Biophotonics

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Real‐time measurement of repetitive micro bulk motion vector and motion noise removal in optical coherence tomography angiography
Journal of Biophotonics ( IF 2.0 ) Pub Date : 2020-12-30 , DOI: 10.1002/jbio.202000469
Jinyu Fan _{1,

2} , Caihua Dong _{1,

2} , Yi He ₂ , Lina Xing ₂ , Guohua Shi _{1,

2,

3,

4}

Affiliation

In this work, we developed a motion estimation and correction method which real‐time obtained the direction and displacement of repetitive micro bulk motion (such as cardiac and respiratory motion) on an SS‐OCT system without additional tracking hardware, and reduced the motion noise in optical coherence tomography angiography (OCTA). In the approach, the direction of repetitive micro bulk motion was considered fixed, and proportional relationships between the motion components in three directions were determined; Then we performed one‐dimension cross‐correlation to obtain depth displacement which was further used to obtain other two motion components, and greatly reduced the computation; The processing speed on a graphic processing unit was 478 pairs of B‐Scans per second, and the measurement range was larger than the range of the angiogram‐based methods. Lastly, corrupt angiograms were recovered by adaptive scan protocol, and reduced acquisition time in comparison with the previous work.

中文翻译：

光学相干断层扫描血管造影术中实时测量重复的微小运动矢量和去除运动噪声

在这项工作中，我们开发了一种运动估计和校正方法，该方法可以实时获得SS-OCT系统上重复的微小运动（例如心脏和呼吸运动）的方向和位移，而无需额外的跟踪硬件，并减少了运动噪声在光学相干断层扫描血管造影（OCTA）中。在该方法中，重复微小运动的方向被认为是固定的，并确定了三个方向上运动分量之间的比例关系。然后，我们进行了一维互相关以获得深度位移，该深度位移又被用于获得其他两个运动分量，并大大减少了计算量。图形处理单元上的处理速度为每秒478对B扫描，并且测量范围比基于血管造影术的方法的范围大。最后，通过自适应扫描协议恢复了受损的血管造影照片，与以前的工作相比，减少了采集时间。

更新日期：2020-12-30

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