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扫描速度影响定量光学连贯性断层扫描血管造影血管指标
Lourdes Vidal-Oliver1, Elisa Herzig-de Almeida2, Sabrina Spissinger2
1Department of Ophthalmology, University Hospital Mannheim & Medical Faculty of Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany. lourvioli@gmail.com.
Scientific reports
|November 23, 2024
概括
光学连贯断层扫描血管造影 (OCTA) 的更高扫描速度减少了采集时间,但在表面和深层血管中显著降低了血管密度 (VD) 和血管长度密度 (VLD) 的测量.
科学领域:
- 眼科医生 眼科 眼科
- 医疗成像医学成像
- 生物医学工程 生物医学工程
背景情况:
- 光学连贯断层扫描血管造影 (OCTA) 对于量化视网膜血管结构至关重要,作为各种疾病的生物标志物.
- 在OCTA制造商和扫描设置的变化可能会影响船舶量化准确性.
- 了解这些技术影响对于基于OCTA的可靠诊断至关重要.
研究的目的:
- 为了研究不同扫描速度对通过OCTA获得的定量血管参数的影响.
- 评估扫描速度如何影响视网膜血管的血管密度 (VD) 和血管长度密度 (VLD).
主要方法:
- 57个健康的眼睛使用SPECTRALIS SHIFT系统进行了OCTA成像.
- 两次连续的20x20°黄斑扫描在85kHz和125kHz进行.
- 在两个扫描速度之间,与扫描持续时间和Q值一起,进行了船舶密度 (VD) 和船舶长度密度 (VLD) 的比较.
主要成果:
- 与125kHz扫描相比,85kHz的OCTA扫描产生了显著更高的VD和VLD值.
- 在125 kHz的VD和VLD的减少在不同的中从3.35%到6.66%不等.
- 采集时间在125kHz下降了22%,但图像质量 (Q值) 较低 (34.1比35.6).
结论:
- 增加的OCTA扫描速度 (125kHz与85kHz相比) 可以减少扫描时间,但导致视网膜血管指标的低估.
- 这些发现强调了标准化扫描设置对于一致的OCTA分析的重要性.
- 需要进一步的研究来量化这些影响在眼睛的眼睛病理.
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