Title:
ULTRASONOGRAPHIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/041114
Kind Code:
A1
Abstract:
An ultrasonographic device includes: an ultrasonic probe formed by using an oscillator whose sensitivity can be controlled in accordance with bias voltage; a front-end amplifier for amplifying an echo signal outputted from the ultrasonic probe; image processing means for generating an image according to the echo signal amplified; display means for displaying the generated image; and probe gain control means for controlling the bias voltage in accordance with the elapse of the reception time when receiving the echo and matching the intensity of the echo signal outputted from the ultrasonic probe with the input range of the front-end amplifier. During a reception period while a strong echo signal is received from the vicinity of body surface of an examinee, the reception sensitivity of the ultrasonic probe is controlled by the probe gain control means so that the echo signal level inputted to the front-end amplifier will not exceed the input range of the front-end amplifier.
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Inventors:
Kanda, Hiroshi (4-15-4, Midori-cho Tokorozawa-shi Saitama, 11, 35911, JP)
Oshiki, Mitsuhiro (1-68-8-301, Asahigaoka Nerima-k, Tokyo 05, 17600, JP)
Shinomura, Ryuichi (9-12, Sawaguchi-cho Higashimatsuyama-sh, Saitama 04, 35500, JP)
Oshiki, Mitsuhiro (1-68-8-301, Asahigaoka Nerima-k, Tokyo 05, 17600, JP)
Shinomura, Ryuichi (9-12, Sawaguchi-cho Higashimatsuyama-sh, Saitama 04, 35500, JP)
Application Number:
PCT/JP2005/018836
Publication Date:
April 20, 2006
Filing Date:
October 13, 2005
Export Citation:
Assignee:
HITACHI MEDICAL CORPORATION (1-14, Uchikanda 1-chome Chiyoda-ku Tokyo, 47, 10100, JP)
Kanda, Hiroshi (4-15-4, Midori-cho Tokorozawa-shi Saitama, 11, 35911, JP)
Oshiki, Mitsuhiro (1-68-8-301, Asahigaoka Nerima-k, Tokyo 05, 17600, JP)
Shinomura, Ryuichi (9-12, Sawaguchi-cho Higashimatsuyama-sh, Saitama 04, 35500, JP)
Kanda, Hiroshi (4-15-4, Midori-cho Tokorozawa-shi Saitama, 11, 35911, JP)
Oshiki, Mitsuhiro (1-68-8-301, Asahigaoka Nerima-k, Tokyo 05, 17600, JP)
Shinomura, Ryuichi (9-12, Sawaguchi-cho Higashimatsuyama-sh, Saitama 04, 35500, JP)
International Classes:
A61B8/00
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