JPS5844041A - Waveform control system of 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 The present invention is for determining a waveform of a super-1-wave diagnostic device in which a 5TC (sensitivity time control) processed waveform is determined by referring to a separately displayed STC non-operating waveform. This relates to method 1 of falling on the side.

Conventional ultrasonic diagnostic equipment scans a living body in an m-shape with a sonic beam from a transmitter through a transducer.
An STC that receives the reflected waves of each scanning line with a receiver and (1) gives a high amplification factor (gain) to the reflected waves from far away! After performing 8 processing, the image is converted to LOQJli width, and then image data is processed and displayed in a predetermined display mode. In this case, the STC settings are made by the operator while looking at the image.
The gain at each point was adjusted based on the depth using a volume control on the control panel, etc. by trial and error, and was set at the point where the image was thought to be the easiest to see. Therefore, it is time consuming (and there are individual differences in how STC is applied), and even images taken at different measurement times are not necessarily taken under the same conditions even by the same operator, making it difficult to make comparative evaluations with previous measurements, etc. . Furthermore, since STC compensates for the attenuation of ultrasonic waves due to the target organ, the STC differs depending on the subject and organ. Therefore, the conventional uniform 6# compensation according to the degree of wiping is not enough, and it is necessary to change the way STC is applied depending on the subject and organ to keep the compensation result constant. be.

The object of the present invention is to provide a complete waveform control force system for an ultrasonic diagnostic apparatus that eliminates individual differences between operators and subjects and allows STC to be quickly set up.

(2) In order to achieve the above object, the waveform control method of the ultrasonic diagnostic apparatus of the present invention transmits ultrasonic waves to the object to be diagnosed, receives reflected waves, and passes them through an adjustment circuit that adjusts the gain of the reflected signals to the screen. The ultrasonic diagnostic apparatus that processes data and displays the data on a screen is characterized in that a switching means for disabling the adjustment circuit is provided.

The present invention will be described in detail below with reference to examples.

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention.

In the figure, a synchronization signal is supplied to a driver (DR) 1 for transmitting an excitation wave, and a drive voltage is applied to an exciter 2 of a transducer.
In addition to this, it generates ultrasonic waves, sends them out to a living body (not shown), receives the reflected waves f, receives the reflected signals with a receiver (REC) 3, and sets the STC un^ switch 5 to bllll.
The image data processing unit 8 passes through a filter in the constant fluorescence range to perform LOG amplification and comprehensive wave detection without applying C. This output is input to the B-mode generating circuit 9, and the display 10 displays the B-mode in real time. It is also possible to sample the data at a predetermined period, 6) A/D convert it, store it in an image memory, and display it continuously in B mode of non-real time tomographic data. On the other hand, by directly inputting the detection signal from the image data processing section 8 into the display tube 11 and synchronizing it with a specific scanning line,
A mode display on the scanning side is performed. Display device 100
While looking at the B mode display and the A mode display of N7j<'#11, turn the switch 5 on the b side to the a side, and turn the S
The amplification factor of the S'l'C amplifier 4 is changed and set via the STC control circuit 6 by adjusting the volume of the TC setting 7. In other words, when the STC is off, the A mode of the scanning line included in the B mode screen is changed. Assuming that the attenuation characteristic is as shown in FIG. 2 (JL), the damping characteristic should be such that when the STC is on, it is at a constant level as shown in FIG. 2 (b).

Further, as shown in FIG. 6(a), the control voltage from the STC control circuit 6 can be adjusted by the operator inputting the peak point (x mark)'ft of each waveform using a Bentouch, Light Bent, digitizer, etc. By supplying the value shown in FIG. 6(b) to the STC amplifier 4, the negative level can be obtained.

(4) As explained above, according to the present invention, the A-mode reflected signal waveform without STC can be separately displayed, and the waveform with STC applied can be determined with high accuracy. This not only makes it possible to set a reasonable STC level by eliminating individual differences between operators and subjects, but also shortens the time taken by the operator to set the STC.

[Brief explanation of the drawing]

Figure 1 is an enlarged explanatory diagram showing the configuration of an embodiment of the present invention, Figure 2 (
a), (b) and Figure 6 (a), (b) are 8
This is an explanatory diagram of the main parts in the embodiment shown in Figure 1. In the figure, 1 #'i ultrasonic transmission driver, 2 Hiro transducers, 6 a receiver, 4 an STC amplifier, 5 a switch, and 6 a STC control circuit, 7 is 5TCH constant section, 8 is image data processing section, 9
10 indicates a B mode creation circuit, 10 indicates a display device, and an 11-line display tube. Patent applicant Fujitsu Ltd. Sub-agent Patent attorney 1) Yoshishige Saka (5)

Claims (1)

[Claims] In an ultrasonic diagnostic apparatus that transmits ultrasonic waves to an object to be diagnosed, receives reflected waves, processes screen data through an adjustment circuit that adjusts the gain of the reflected signal, and displays the screen data on a display, the adjustment circuit is inactivated. A waveform control method for an ultrasonic diagnostic apparatus, characterized in that a switching means is provided.