TY - JOUR
T1 - Distorted Image in Ultrasonic Tomogram Caused by Refraction with Cylinder
AU - Soetanto, Kawan
AU - Ohtsuki, Shigeo
AU - Okujima, Motoyoshi
PY - 1984/1
Y1 - 1984/1
N2 - A study was made on echogram distortion based on the refraction of an acoustic ray behind a cylinder that was large compared with ultrasonic beam width. It was observed from the results of the experiment and was simulated by computer that the image of a reflector behind a cylinder is reduced and shifted to the transducer when the sound velocity of the cylinder is faster than that of water. When a cylinder with a sound velocity lower than its surroundings was used, the distorted image around the focal point appeared enlarged and farther from the transducer. The image reduction in a direction lateral to the ultrasonic beam was estimated by a lateral reduction rate.
AB - A study was made on echogram distortion based on the refraction of an acoustic ray behind a cylinder that was large compared with ultrasonic beam width. It was observed from the results of the experiment and was simulated by computer that the image of a reflector behind a cylinder is reduced and shifted to the transducer when the sound velocity of the cylinder is faster than that of water. When a cylinder with a sound velocity lower than its surroundings was used, the distorted image around the focal point appeared enlarged and farther from the transducer. The image reduction in a direction lateral to the ultrasonic beam was estimated by a lateral reduction rate.
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U2 - 10.7567/JJAPS.23S1.179
DO - 10.7567/JJAPS.23S1.179
M3 - Article
AN - SCOPUS:84915926233
SN - 0021-4922
VL - 23
SP - 179
EP - 181
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
ER -