Method for dynamic focus control
AssigneeComputed Ultrasound Global Inc.
InventorsJing-Jung Huang, Pai-Chi Li
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Abstract
Methods perform dynamic focusing of a coherent array imaging system are invented. Dynamic focusing in ultrasonic array imaging involves extensive real-time computations and data communication. Particularly for real-time three-dimensional imaging using fully-sampled two-dimensional arrays, implementation of dynamic focusing can be extremely complicated. The invention described in this disclosure greatly simplifies the delay control mechanism by exploiting both spatial and temporal characteristics of the focusing delay patterns. The simplification primarily results from (1) grouping adjacent channels into sub-apertures for the range dependent focusing component, and (2) non-uniform quantization of the delay values.
Claims16
A method of dynamic focus control for an array imaging system having an array of channels, each of which has a delay value and a delay controller for performing a delay control, comprising a step of dividing delay value of a particular said channel into a range independent component and a range dependent component, wherein said range dependent component is inversely proportional to a range and has a corresponding Φ value dependent on the location of said channel.
Dependencies are inferred from the claim text.