CAJ | 학술논문

目的光学相干层析成像系统（Optical Coherence Tomography, OCT）进行动态成像时，运动伪差会使图像产生畸变，从而可能导致临床诊断的误诊以及错诊，运动伪差的校正已经是亟待解决问题。方法首先用改进的自适应非线性复合扩散滤波器对连续采集的序列图像进行预处理降噪，然后用图像的质量重心对畸变的体数据在Y方向进行粗略的对齐，再用差值平均法对Y方向的运动伪差进行校正。结果经过校正，纵切2D图像毛刺消失，表面平滑；3D图像表面平滑，结构清晰，层次分明，视网膜en-face单层切片图像清晰，可以观察到眼底组织细微结构。结论经过运动伪差校正后，眼底视网膜的生理结构得到了真实的反应。
목적광학상간층석성상계통（Optical Coherence Tomography, OCT）진행동태성상시，운동위차회사도상산생기변，종이가능도치림상진단적오진이급착진，운동위차적교정이경시극대해결문제。방법수선용개진적자괄응비선성복합확산려파기대련속채집적서렬도상진행예처리강조，연후용도상적질량중심대기변적체수거재Y방향진행조략적대제，재용차치평균법대Y방향적운동위차진행교정。결과경과교정，종절2D도상모자소실，표면평활；3D도상표면평활，결구청석，층차분명，시망막en-face단층절편도상청석，가이관찰도안저조직세미결구。결론경과운동위차교정후，안저시망막적생리결구득도료진실적반응。
Objective Optical coherence tomography images may be distorted by motion artifacts in dynamic imaging, so it may lead to misdiagnosis in clinical diagnosis. Motion artifacts correction has become an urgent issue in optical coherence tomography imaging. Methods Firstly, using the improved complex nonlinear diffusion preprocessing filtering reduced the noise of the sequence images, then using the image mass center aligned the distortion data in the Y direction, final y, using the method of deviation average corrected motion artifacts along the Y direction. Results After correction, the motion artifacts in the longitudinal 2D images and the 3D image disappeared, the surface of the 2D and the 3D image became more smooth, the structure between layers of the images got clear and distinct, retinal en-face single slice image was sharp ,and the fundus tissue structure could be observed. Conclusion The algorithm of correction makes the physical structure of the retinal display truly after motion artifacts correction.