B型超声检查（眼球）
眼科项目
≈ ¥60-120
(≈ $8-17)
大约15-30分钟
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项目介绍
B型超声检查（眼球）在一般公立医院参考费用约¥40-95，三甲医院参考费用约¥60-120，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
Primary clinical uses include: evaluating posterior segment anatomy when optical media are opaque (e.g., cataract, corneal opacity, vitreous hemorrhage); detecting and characterizing intraocular tumors (size, shape, internal reflectivity, vascularity via Doppler adjunct); diagnosing retinal detachment, choroidal detachment, and vitreous opacities; measuring axial length for intraocular lens calculation (especially in high myopia or aphakia); assessing optic nerve head morphology (e.g., papilledema, optic nerve drusen); and guiding interventions (e.g., biopsy planning, radiation therapy targeting).
正常值范围
B-scan ultrasonography of the eye does not yield numerical 'values' like laboratory tests; instead, it provides qualitative grayscale images. Normal findings include: intact, smooth, and continuous scleral and choroidal echoes; a homogeneous vitreous cavity with no internal echoes (appearing anechoic); a well-defined, convex lens with uniform echogenicity; a clearly visualized retina with normal thickness (~0.2–0.3 mm) and attachment to the choroid; absence of intraocular masses, hemorrhage, or retinal detachment; axial length typically 22–24 mm in adults.
偏低可能原因
Low echogenicity (hypoechoic or anechoic areas) may indicate: 1) Vitreous hemorrhage (acute phase may appear hypoechoic before becoming echogenic), 2) Posterior vitreous detachment (PVD) with minimal debris, 3) Cystic retinal lesions (e.g., retinoschisis), 4) Optic nerve sheath cysts, 5) Aqueous-filled cysts or congenital anomalies (e.g., coloboma). Note: 'Low values' are not quantitative—this refers to reduced echo amplitude relative to surrounding tissues.
偏高可能原因
High echogenicity (hyperechoic areas) may indicate: 1) Calcified intraocular tumors (e.g., retinoblastoma, choroidal osteoma), 2) Dense vitreous hemorrhage (chronic or organized), 3) Choroidal melanoma with intrinsic calcification or high cellularity, 4) Scleral buckle material (post-surgical artifact), 5) Intraocular foreign bodies (e.g., metal, glass). Again, 'high values' reflect increased acoustic reflectivity—not numeric elevation.