JPS60193447A - 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 (Technical Field) The present invention relates to an ultrasonic diagnostic apparatus, and more particularly, to self-diagnosis (multiple diagnosis) of a pulser and a first-stage amplifier.

(Prior Art) An ultrasonic diagnostic apparatus that scans a subject with follow-up sound waves and obtains a tomographic image of the subject is conventionally known. Such ultrasonic diagnostic equipment uses an ultrasonic probe that projects ultrasonic waves onto a subject from a probe with a large array of transducers, receives the reflected waves again with the probe, and converts them into electrical signals. It is equipped with In order to use this probe, there are a number of pulse generators that apply pulses to a number of transducers to drive them, and a number of first-stage amplifiers that receive the foul wave signals (electrical signals) from each transducer. provided. In the case of a relatively small diagnostic device, the pulse generator and first stage amplifier each have about 8 circuits, and in the case of a large one, 100 circuits.
The structure is more than a circuit.

If any one of these many pulsers or first-stage amplifiers breaks down, it will directly affect the image, making it impossible to obtain a high-quality image, so failure diagnosis is also an important matter.

Now, how the failure described in -F- was diagnosed using the conventional device is as follows. In other words, use the following method while manually switching each circuit one by one.

(1) Connect an oscilloscope to the connector connected to the ultrasonic probe (hereinafter referred to as probe) for the pulser, and inspect the waveform of each circuit one by one.

(2) Regarding the first stage amplifier, pseudo 1 is connected to the oscillator etc. from the connector connected to the probe.
Input No. 5 one circuit at a time and check the pattern that appears on the display of the diagnostic device.

However, such an inspection method has the problem that it takes 14 hours to perform manually, and also requires special jigs and oscilloscopes, making it unsuitable for on-site testing.

(Object of the Invention) The present invention was made in view of the above problems, and its purpose is to easily self-diagnose the pulse generator and first stage amplifier without using special jigs or oscilloscopes. An object of the present invention is to provide an ultra-Hatanami diagnosis 1'Ji device.

(Structure of the Invention) The present invention that achieves the above object includes a probe composed of a plurality of transducers, and a pulse that corresponds one-to-one to the transducers and generates a pulse for driving the transducers. A large number of pulsers, a large number of first-stage amplifiers provided corresponding to the pulsers and receiving the received signal from the vibrator, and a single sound line signal by selecting one of the outputs of the first-stage amplifiers. and a means for extracting the output as appropriate and displaying 1
and a controller capable of controlling selection of the outputs of the pulsers and the first stage amplifier, and in a test mode, each circuit in the pulsers is controlled by the controller. Drive
The output of the first-stage amplifier corresponding to the pulser is selected each time the pulser is input, and it can be determined which phase of the pulser or the first-stage amplifier is defective from the abnormality of the displayed image obtained. It is characterized by

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the present invention. In the figure, 1 is a controller, 2 is a pulser circuit, 3 is a probe, 4 is a first stage amplifier group, 5 is a switch, 6 is a processing circuit, 7 is a storage device, and 8 is a display.

The pulsar circuit 2 consists of a large number of pulsars Po-Pn (64 pulses in the fruitful example,
Probe 3 is driven by human power from roller 1 to 1! Generates a pulse. The probe 3 consists of a large number of transducers To to 1-n (64 transducers here),
Each vibrator is connected one-to-one to the pulsers Po to PG3, and is excited by a drive pulse from the pulser to generate ultrasonic waves. Further, each transducer receives a sound wave that is returned from the object (not shown) and converts it into an electrical signal.

This electric signal is guided to each first-stage amplifier A◯ to An (here, 64 amplifiers) of the first-stage amplifier group 4, which are connected one-to-one to each vibrator. Switch 5 is a cross-point switch that selects and outputs any one first-stage amplifier output in test mode, or any plurality of first-stage amplifier outputs in normal measurement mode, based on the control signal from the controller. It is b. still,
Multiple 1t! When the first stage amplifier output of J is selected, they are assembled into one 8-wire Shintan and output.

The processing device 6 performs necessary logarithmic compression 4b, appropriate signal correction, and digitization of the processed lζ signal.

The storage device 7 is for temporarily storing the output of the processing device 6. Display 8IJ, storage device 7
This is for displaying image data stored in the .

Next, I will explain the action in this J, Una (?6 formation).

When the test mode is set (the operator specifies the controller 1), the controllers 1 to 1 first start only one balsa, for example, balsa Po, in the balsa circuit 2, and then turn on the other balsars P1 to 1. P63 is controlled so as not to start. As a result, only the vibrator TO directly connected to the balsa P○ is driven. In this case, the output of the balsa P○ is configured so as not to be input to the first stage amplifier ΔO (due to the action of a switch or a limiter, not shown). Oscillator P
The reflection that is projected from O and returns from the subject,
Waves can arrive at all oscillators. The reflected wave signal converted into an electric signal is input to the switch 5 via the first stage amplifier Δ0-A83 which is in a receiving state. The switch 5 selects only the output of the amplifier AO according to instructions from the controller 1 to the roller 1, and sends a reflected wave signal to the processing circuit 6.

This kind of operation is performed by balsa P1~□P63.7 balsa A1~
Regarding A63, balsa P1 and amplifier Δ1° balsa P2
and amplifier A2. . . , and the reflected wave signal data is taken into the storage device 7.

The above eight operations are performed with the probe floating in the air and with the probe placed in a water tank or the like containing a source of foul play. The reflected wave signal data obtained by J: is displayed on the display 8''. Represents the distance from the 114th plane (in the depth direction).

In the figure a5, the upper horizontal line 41 is an image of the front surface of the probe reflected from, for example, a rubber lens', when the probe is in the air, and the horizontal line 42 in the center
1 and 2 respectively show images from reflection sources in the aquarium. In the figure 1. J, the 31st image of the test channel is omitted,
Due to this, Balsa P31. It is necessary to know that at least one of the first stage amplifiers A3H is defective.

In addition, instead of testing in water, defects can also be detected in the same way by touching the probe directly to the subject and displaying the image (τ). Nu, this J
Although the signal selection is performed using the cross point switch f-5, the first stage amplifier itself is in the reception state and non-reception state depending on the control signal from the controller. It is also possible to create a 1'' target like Ii1 without using a switch by controlling 1g and 4M formation.

Further, in this embodiment, the transmission drive element and the reception element are elements of the same wavelength, but it is also possible to use separate transmission and reception elements. For example, the element of channel O, that is, the pulse (J-
It is transmitted by P O and transducer 1-o, and transducer To～-"63
．． Each channel of the amplifiers Ao to Δ63 sequentially receives data, and then the elements of channel 1, that is, the balsa-PI and the
Similarly, all channels 1r receive the signal sequentially in the same manner. According to such a transmitting/receiving system, it is possible to make a determination by dividing the transmitting circuit system and the receiving circuit system.

On the other hand, in the normal measurement mode, the following movement a'1 occurs. The balser circuits 2 are driven all at once with an appropriate delay to focus the ultra-j'# wave beam from the probe 3. The receiving part signal inputted to the first signal amplifier IF is similarly time-delayed and combined into one sound line signal by the switch 5. In this case, the purpose is J: balsa circuit,
It is also possible to reduce the number of first-stage amplifiers used simultaneously, reduce the number of amplifiers, and adopt a variable frontage system such as J8. In this way II? lζ Received signal (J, processing circuit 6. storage device [[17] is displayed on the eye display 8.1 (Effects of the invention)) As mentioned above, according to the present invention, the processing circuit 6. For example, by commanding the test mode to the controllers 1 to 1 and the rollers, it is possible to easily detect defects in the pulse → no and first stage amplifiers through images, and it is possible to easily detect defects in the pulse → There is no need to do this, and it is very convenient for use as a platform for maintenance work on site.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention.
The figure shows display screen 1 of test T knee 1-. - shows an example; 1... Controller! , resa circuit PO~P63 pulser 3...probe To"Te3・
...Resonator 4...First stage amplifier group △0-863...First stage amplifier 5...Switch 6...Processing circuit 7...Storage device 8...Display Atsushi 2

Claims (1)

[Scope of Claims] (1) A probe composed of a plurality of oscillators, and a number of pulsers that generate pulses for driving the oscillators in one-to-one correspondence with each oscillator; A number of first-stage amplifiers are provided corresponding to this pulser and receive signals received from the vibrator, and one of the outputs of this first-stage amplifier is selected.
The device includes a means for extracting a real sound ray signal, a means capable of appropriately processing and displaying the output signal from this means, and a controller capable of controlling selection of the outputs of the pulser and the first stage amplifier. and in test mode,
Based on the control by the controller, each time one of the circuits in the pulser is driven, the output of the first stage amplifier corresponding to that pulser is selected. Super wave diagnosis 1, which is characterized by determining whether it is defective or not and making it 11I bright! li device. (2) The means for selecting either the first-stage amplifier or the output of the first-stage amplifier uses, as the first-stage amplifier, a first-stage amplifier configured such that input possible states can be selected;
Feature r1 characterized in that these first stage amplifiers are configured to be controlled by a controller 1-〇- and are fs type.
An ultrasonic diagnostic apparatus according to claim 1.