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KMID : 0372919810020020141
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Journal of Biomedical Engineering Research
1981 Volume.2 No. 2 p.141 ~ p.144
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Effects of Refraction of Ultrasonic Beam on B-mode Tomograms
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Abstract
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This paper descirbes about effects of refraction of ultrasonic beam on B-mode tomogram. Both compution based on Snell’’’’s law and the experiments performed using B-mode scanner and schlieren optical method are discussed on a circular phantom immersed in water. In these results, if the discrepancy of sound velocity is more than 0. 6%, the distortion of the B-mode image becomes conspicuous and a target beyound the phantom may disappear or displayed as two targets depending on the velocity of the phantom.
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