OCT血管成像（OCTA）
眼科项目
≈ ¥200-500
(≈ $30-70)
大约15-30分钟
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项目介绍
OCT血管成像（OCTA）在一般公立医院参考费用约¥140-400，三甲医院参考费用约¥200-500，常用于相关诊断评估与就医安排，费用随医院及地区有所差异。
主要用途
Non-invasive visualization and quantitative assessment of retinal and choroidal microvasculature; early detection and monitoring of diabetic retinopathy, glaucoma, age-related macular degeneration, retinal vascular occlusions, and inherited retinal diseases; evaluation of foveal avascular zone (FAZ) morphology and integrity; differentiation of neovascularization (e.g., type 1 vs. type 2 MNV); treatment response assessment (e.g., anti-VEGF therapy); research applications in neuro-ophthalmology and systemic disease biomarkers (e.g., Alzheimer’s, hypertension).
正常值范围
OCTA does not yield scalar 'values' with blood tests. Instead, it produces qualitative and semi-quantitative metrics (e.g., vessel density [%], foveal avascular zone [FAZ] area [mm²], FAZ circularity, perfusion density [%], choriocapillaris flow deficit area [%]). Normal ranges vary by device (e.g., Zeiss AngioPlex, Optovue RTVue XR Avanti), scan protocol (3×3 mm, 6×6 mm),ficial capillary plexus [SCP], deep capillary plexus [DCP], choriocapillaris), and age. Example typical values in healthy adults: SCP vessel density = 45–55%; DCP vessel density = 50–60%; FAZ area = 0.25–0.35 mm²; FAZ circularity = 0.70–0.90; choriocapillaris perfusion density = 65–75%.
偏低可能原因
Diabetic retinopathy (capillary non-perfusion), retinal vein occlusion (ischemia), glaucomatous optic neuropathy (reduced peripapillary vessel density), age-related macular degeneration (geographic atrophy, choroidal flow deficits), retinitis pigmentosa (progressive microvascular attenuation), hypertensive retinopathy (arteriolar narrowing and capillary dropout).
偏高可能原因
OCTA does not produce clinically meaningful 'high' quantitative values in the conventional sense; apparent 'increased' signal is typically artifactual — e.g., motion artifacts, projection artifacts (especially in DCP/choriocapillaris), segmentation errors, vitreous opacities, or excessive image averaging. True pathologic hyperperfusion is exceedingly rare and not reliably quantified by current OCTA; conditions like inflammatory vasculitis may show irregular flow but not globally elevated vessel density.