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第一节 血管性病变 一、视网膜中央动脉阻塞(Central RetinalArtery Occlusion) 灰阶声图像:一般无变化,有时可在视神经处见动脉内的呈强回声的小光点或光团。 频谱多普勒:视网膜中央动脉血流速度明显减慢或无动脉性频谱。部分病例频谱出现主峰后移现象,舒张期血流速度明显减慢。 彩色多普勒:彩色血流显示不良,血流束变细,边缘不整,连续性差或无彩色血流显示。阻塞部位可出现在视网膜中央动脉的相应部位。
The first section of vascular lesions, central retinal artery occlusion (Central RetinalArteryOcclusion) gray-scale acoustic images: generally no change, and sometimes in the optic nerve at the end of the artery showed a strong echo of small spots or light group. Spectral Doppler: Central retinal artery blood flow is significantly slower or no arterial spectrum. In some cases, the main peak of the spectrum appeared after the shift phenomenon, diastolic blood flow significantly slowed down. Color Doppler: poor color flow showed blood flow thinning, irregular edges, poor continuity or no color flow display. Obstruction can occur in the corresponding part of the central retinal artery.