A-scan ultrasonography
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Related to A-scan ultrasound biometry: ophthalmic biometry
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| Noun | 1. | A-scan ultrasonography - the use of ultrasonography to measure the length of the eyeball echography, sonography, ultrasonography, ultrasound - using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs |