組識の微動に起因する超音波エコーの抽出と断層像の構成

抄録

As ultrasonogram constructed from reflected echo signals has a large dynamic range in its image. Echo signals are observed, appearing sometimes with fluctuations due to a tissue movement and weak echoes are mingled with scattered noise. Such phenomena make it difficult to identify a tissue (specially a weak-echo reflecting tissue) in its original ultrasonogram.
This paper proposes a method to detect echo signals from a tissue with involuntary movement, by using the periodic property appeared on a set of multiple ultrasonograms of the same scanning cross section. The introduced spectrum discrimination method is examined together with the relating moving average method from practical and characteristic points of view.
This method is applied to ophthalmic tissue, yielding a useful processing.