JPH0331408U

JPH0331408U -

Info

Publication number: JPH0331408U
Application number: JP9314789U
Authority: JP
Priority date: 1989-08-08
Filing date: 1989-08-08
Publication date: 1991-03-27

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例のブロツク図、第２
図は第１図の実施例における注目領域を示す図、
第３図は本考案の他の実施例のブロツク図、第４
図は第３図の実施例の注目するサンプリングボリ
ユームの図、第５図は出力レベル自動制御回路の
ブロツク図、第６図は心電信号とデータ採取の関
係を示す図、第７図はマルチビーム送受信の図で
ある。１…超音波探触子、２…スキヤナ、３…イメー
ジメモリ、４…ＤＳＣ、５…表示器、６…信号レ
ベル検出器、７…ノイズレベル演算器、８…ＳＮ
比評価器、９…フイードバツク論理部、１１…注
目領域、２１…超音波ドプラ送受信部、２２…Ｆ
ＦＴ、２５…注目サンプリングボリユーム、３１
…可変利得増幅器、３４…フイードバツク回路、
４１…２次元アレイ探触子。 Fig. 1 is a block diagram of an embodiment of the present invention;
The figure shows the attention area in the embodiment of FIG. 1,
Figure 3 is a block diagram of another embodiment of the present invention; Figure 4 is a block diagram of another embodiment of the present invention;
The figure shows the sampling volume of interest in the embodiment of Fig. 3, Fig. 5 is a block diagram of the automatic output level control circuit, Fig. 6 shows the relationship between electrocardiographic signals and data acquisition, and Fig. 7 shows the multi-channel It is a diagram of beam transmission and reception. 1...Ultrasonic probe, 2...Scanner, 3...Image memory, 4...DSC, 5...Display device, 6...Signal level detector, 7...Noise level calculator, 8...SN
Ratio evaluator, 9... Feedback logic section, 11... Region of interest, 21... Ultrasonic Doppler transmitting/receiving section, 22... F
FT, 25... Featured sampling volume, 31
...variable gain amplifier, 34...feedback circuit,
41...Two-dimensional array probe.

Claims

[Scope of claim for utility model registration] (1) In a B-mode transmitting/receiving ultrasonic diagnostic device, an ultrasonic pulse echo transmitter/receiver Scanner 2 that transmits ultrasonic signals, receives reflected signals, and processes the signals.
, an image memory 3 that captures and stores multiple frames of data obtained from the received signal, and a signal level detector that calculates the average value of the signal over multiple frames of the region of interest or outputs the signal level itself of each frame. a noise level calculator 7 that extracts signal changes between a plurality of frames in the region of interest and detects a noise level; SN to calculate the SN ratio from the output
It is characterized by comprising a ratio evaluator 8 and a feedback logic unit 9 that receives the output data of the SN ratio evaluator 8 and controls the transmitted power so as to obtain a preset minimum necessary SN ratio. Ultrasonic diagnostic equipment. (2) An ultrasonic Doppler transmitter/receiver unit 21 that generates a signal for ultrasound transmission, amplifies and detects a received signal that has undergone a Doppler shift, and outputs it, and a Doppler that determines a Doppler shift frequency from the received signal. a signal analysis unit 22; an SN ratio evaluator 8 that calculates and outputs an SN ratio from the output of the Doppler signal analysis unit 22 and a preset nozzle level; and an SN ratio evaluator 8 that receives output data of the SN ratio evaluator 8 An ultrasonic diagnostic apparatus characterized by comprising a feedback logic section 9 that controls transmission power so as to obtain a preset minimum necessary SN ratio. (3) In the receiving circuit of the ultrasonic pulse echo receiver scanner 2 or the ultrasonic Doppler transceiver unit 21 that transmits ultrasonic signals, receives reflected signals, and processes the signals, the gain is changed by a control signal. a gain amplifier 31; a detector 32 that detects the output of the variable gain amplifier 31 and outputs a low frequency signal; and a detector 32 that detects the output of the variable gain amplifier 31 and outputs a low frequency signal;
3. The ultrasonic diagnostic apparatus according to claim 1, further comprising a feedback circuit (34) for maintaining the level of the detected output at a constant value by feedback to the level of the detected output. (4) The feedback logic unit 9 outputs a control signal for narrowing down the transmitted power in sections other than the small section represented by the desired sound ray number in the time series or location derived from the scanning procedure or biological phenomenon. The ultrasonic diagnostic apparatus according to claim 1, 2 or 3, characterized in that the ultrasonic diagnostic apparatus is (5) Perform multi-beam forming to perform multi-beam transmission and reception, and the transmitted beam is a fan beam.In an ultrasonic diagnostic equipment that has a multi-sound line transmission and reception function, the transmission level is set separately for each beam. 5. The ultrasonic diagnostic apparatus according to claim 4, further comprising a feedback logic section 9 for controlling.