Imaging Method for Acoustic Impedance Difference for Puncture Needle-Type Ultrasonography using a Thin Rod with Focusing End Face
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概要
- 論文の詳細を見る
In this paper, we propose an imaging method for acoustic impedance difference for puncture needle-type ultrasonography. The difference in acoustic impedance between benign and malignant tissues will provide valuable diagnostic information. In this experiment, a thin rod that has a concave polished end face was constructed using a fused quartz with a diameter of 1 mm and a focus length of 0.3 mm. An ultrasonic wave emitted from the concave end face of the rod is focused on a tissue. The difference in acoustic impedance was determined by the reflection-type interference-based acoustic impedance measurement method. We confirmed that the image shows the difference in impedance between the polyethylene (PE) plate and acrylic rod with a diameter of 3.5 mm embedded therein. The experimental results show that the method is useful for puncture needle-type ultrasonography.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-05-25
著者
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Itoh Kouichi
Hitachi-omiya Saiseikai Hospital
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Yoshizawa Masasumi
Tokyo Metropol. Coll. Of Industrial Tech.
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Irie Takasuke
Microsonic Co. Ltd.
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Irie Takasuke
Microsonic Co., Ltd., 3-9-11 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Moriya Tadashi
(emeritus) Department of Electrical Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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Itoh Kouichi
Hitachi-Omiya Saiseikai Hospital, 3033-3 Tagouchi-cho, Hitachiomiya, Ibaraki 319-2256, Japan
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Yoshizawa Masasumi
Tokyo Metropolitan College of Industrial Technology, 8-17-1 Minamisenjyu, Arakawa-ku, Tokyo 116-0003, Japan
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