JPS5822048A - Ultrasonic diagnostic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention relates to an ultrasonic diagnostic device that has recently been used in hospitals to diagnose a single person. Since the ratios are different, when ultrasonic waves are transmitted into the body and echoes from various parts of the body are received, the magnitude of the echo signal corresponds to each tissue in the body. Niro explains that ultrasonic waves reflect inside the body (the realm of each tissue).
1) If it hits K right angle Ka, Yoi will hit, but if it hits diagonally,
In view of the above, the present invention has the disadvantage that only a weak echo signal can be obtained, making it impossible to obtain a clear image.In view of the above, the present invention has been developed by processing the echo signal using an electronic circuit. On the other hand, the object of the present invention is to provide an ultrasonic diagnostic device that can obtain clear images even when the ultrasound is applied obliquely.

Hereinafter, an embodiment of the present invention will be explained with reference to the reference number i. As shown in FIG. 1, a probe (ultrasonic transducer
tlf11tiJ se,? Neat) By driving the 811 child 21 with the wave transmitting circuit 22 synchronized with the synchronization circuit 28,
For example, the ultrasonic beam shown by the solid line in the figure is 1 * 2
The waves are transmitted one after another according to the order of e 8 *”・* 1roll.The receiving circuit 24tj probe 21 is controlled by the electronic fishing KM. , 1 , 2 corresponding to each transmitted ultrasonic liquid beam
, lI, -.

Obtain the third echo signal one after another. This echo signal is transmitted to the detection #1 circuit 26, the filter 2@11i, and the storage device 2.
7, and is sampled at every predetermined sampler cycle by the D conversion@28 controlled by the # circuit 81 synchronized by the synchronization circuit 2tlK and converted into digital data. Each echo signal reaches the probe 21 through a path as shown by the dotted line in the figure and corresponds to a friend echo. Therefore, as seen from the probe 21, echoes from shallow areas arrive earlier in time; Echoes from deep areas arrive later. Therefore, the r digital data obtained one after another by the mu D converter 28 each represent the reflectance at each predetermined depth in the dotted line direction (distance direction) K. The data arranged in the depth direction obtained for each echo signal is written to each address of the memory 29 one after another under the control of the control circuit 81. For example, as shown in FIG. When Ktj memory 2@ is vertically moved, t! Then, the depth direction KM obtained from each echo signal is convolved with each address Klj on the vertical direction O scanning line. In this way, writing up to the first echo signal is completed, and 1
After the data for the screen has been written, the memory 29 is scanned horizontally Kji times as shown in FIG. The digital data read out in this way is different from the equidistant II (this [Seibuka line and 15)] in the direction of the ultrasonic beam emitted from the probe 21, and this is the DA change II. The signal is converted into an analog signal by the converter 8. 9. When reading an address on one horizontal scanning line as shown in Figure IK, l analog signals (this is called a display signal) are generated.
is obtained.

This display signal is sent to the circuit 82, such as the one shown in Figure 8, for example.

In the 12th step, the phase shift asss is used to shift the time t to obtain a signal as shown in FIG. 8 IK, and the signal inversion circuit 84 obtains a signal as shown in JIIICK When these signals are sent to the Fi addition circuit 85 and added, a signal as shown in Figure IIs is obtained, and when this is rectified by the rectification fiL circuit 86, the negative side signal is converted to the positive side. and get the signal shown in ls8 Figure I. This signal was originally OII! When the display signal (Fig. 8) is mixed with the mixer 87, a signal as shown in Fig. 1111F is produced.
An enhanced signal is obtained. This signal tx-y monitor 8
8 as the luminance signal 2. This X-Y monitor ssh,
A deflection signal in the X direction and a deflection signal in the Y direction are given to the concentric scanning circuit 89 which is synchronized with the Okashiki 2gK.
The luminance signal 2 is displayed on concentric scanning lines as shown in the figure.

Assuming that a ring-shaped reflector 12 exists in the object 11 and ζ is 9, then the ! of this reflector 12 is ! The echo signal from the 1111 direction is weak. Therefore, as in the conventional display scanning corresponding to the incident direction of the echo, the 4th rIAA is
As shown in K, the echo signal tl [Next, when displayed, the image becomes faint near the area where the ultrasonic beam touches, but according to the above O configuration, the storage device H? When the 0 writing direction and read direction are changed, the data arranged in the depth direction is changed to the data arranged on the depth line, and the data is displayed in concentric circles while emphasizing the part. -Kl as shown in *4 diagram BK above! Since it is O which shows, ili like 114
The blurring of the image is improved, and a sharp image corresponding to the ring-shaped reflector 12 can be obtained as shown in No. 4A.

It should be noted that this is one rule used by 1iljJL friend for the sake of convenience when the writing scanning direction and the reading scanning direction are vertical and horizontal in two storage devices, and the fragrance m of memory 2- is actually mK vertical and horizontal. They do not need to be lined up in the same direction, but it is sufficient that r-waves at the same depth of a large number of echo signals are read out.

Further, the structure of the power supply circuit 82 is not limited to the above-mentioned one, but may be constructed using, for example, a differential circuit to perform the OS function.

Furthermore, although the above embodiment is for the case where the ultrasonic beam is scanned during the sector, in the case of linear scanning, the display scan of the x-y monitor 88 corresponds to a depth of 1 gK as seen from the probe. Approximately the same alK can be applied by simply assuming that the KiI line is a horizontal KiI line.

The embodiments have been described above, and according to the present invention, even when an ultrasound beam hits a reflector inside the subject obliquely and only a weak echo signal is obtained, a clear echo signal can be obtained. Picture g
11 can be displayed.

Table 1IO simple a light 1ml is a professional diagram of an embodiment of the present invention, diagram, diagram 2,
The wealth is a diagram showing a schematic memory map of rounding including memo IJOI and Ode Taki inspection, Figure 8 M~F is a signal waveform diagram of each point of M~F in Figure 1, Iris 4@A , is a diagram showing a display screen for explaining the operating tube of Company B.

11--Object, 12--Reflector, 21--
・Probe, 22--wave transmitting circuit, 28--synchronous circuit, 24-- wave receiving circuit, 26--detecting circuit,
26-Filter, 27--Storage device, 28-
・・MuD converter, 29-・Memory, 8O-DA
Converter, 81... Control circuit, [To... Engineering, Ji*1
I111 circuit, 88--phase shift circuit, 84--signal inversion circuit, 86--addition circuit, [T...IIfIL
Circuit, 87...Mixer, 88...X-Y monitor, 89...Concentric scanning circuit.

Applicant: Shimadzu Ensakusho Co., Ltd.

Claims (1)

[Claims] (1) Ultrasonic beams (-/#) are transmitted one after another into the subject from the probe, and the echoes of each ultrasonic beam are received on the surface like the liquid-transmitted ultrasonic beam. In an ultrasonic diagnostic apparatus designed to obtain echo signals one after another, data stolen in the ultrasound beam direction obtained by ten-ringing each echo signal is scanned in each memory in a predetermined scanning order. After writing the data for 1 FIi surface, read out the data stored at each address in the memory in a different scanning order), rearrange the data, and move the probe Obtain a display signal (data arranged on an equidistant line along the ultrasonic beam emitted from the An ultrasonic diagnostic device configured to display information on a display scanning line corresponding to a cocoon weight equidistant line.