A Method for 3D Measurement with High Resolution Using Ultrasound Spherical Waves

概要

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Many methods for 3D measurement using ultrasound spherical waves with many ultrasound receivers have been proposed to date for use as sonars applied to fish-finders and underground locators. These methods, however, generated elliptically symmetric artifacts so that even a simply shaped object was revealed as distorted elliptic planes in 3D (lines in 2D) which made it difficult to recognize its shape. This paper describes a newly developed 3D measurement method using ultrasound spherical waves with an ultrasound ring-array probe. Our new method does not weight points aligned on an elliptic plane with the same value. This method is based not on a simple expansion method but on an optimization method. To evaluate the system and to compare it with the previous algorithms, a computer simulation assuming several point reflectors was performed. The results indicated that point reflectors were represented not in the elliptic planes but as points placed the assuming location. This method is especially useful for intravascular ultrasound frontal viewing.
社団法人応用物理学会の論文
1997-05-30