FILTER ASSEMBLY FOR ULTRASOUND IMAGE SIGNAL, BEAM FOCUSING APPARATUS USING SAME, AND BEAM FOCUSING METHOD THEREOF

摘要

A beam focusing method according to an embodiment of the present invention comprises the steps of: compensating for a coarse delay by fetching data from a memory, in which received ultrasound signal data is sequentially stored, with reference to a coarse delay address; determining data, which has been coarse-delayed in the process of being fetched from the memory, as an input group according to a variable decimation ratio; selecting, by a shift register, a filter coefficient group having a phase corresponding to a fine delay error of the input group; compensating for a fine delay time by supplying the selected filter coefficient group and the input group to a partial-sum computational-body including a multiplier-accumulator (MAC); and calculating a beam focusing result by adding output values of all channels provided with partial-sum computational-bodies.