JPS5875539A - Digital scan converter for 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 relates to a digital scan converter (DSC) for ultrasonic diagnostic equipment.

Recently, storage tube type analog scan converters have been used in the industry, but now digital scan converters using IC memory have become mainstream. Since this fully equipped ultrasonic diagnostic equipment records echo signals as digital quantities, it is possible to attempt various image processing at the display stage using programs such as distance, area, and other measurements. For images recorded before, the above measurement cannot be performed after that.

To solve this problem, it has been proposed to use a frame memory, but this requires considerable cost.

The present invention also allows distance,
Digital scanner y core per fi (
〇This purpose is to provide DSC)
This is accomplished not only by simply connecting the output of the VTR to the input of the VTR, but also by feeding back the output of the VTR using an externally settable switching device when desired to reuse the video signal.

Next, preferred embodiments of the present invention will be described with reference to the drawings.

For comparison, FIG. 1 shows a schematic block diagram of a conventional example.
Reference numeral 8 denotes a main body of the ultrasonic diagnostic apparatus, the output of which is connected to a digital scan comparator 79. The digital scan converter 9 generally includes three memories: an image memory 1, a character memory 3, and a dot memory 4 indicating υC measurement points on the screen, and a synchronization signal generation circuit 1O that generates signals for reading these memories. 02 is the address controller of the image memory 1. The output takes ■, ■, ■ of the image memory 1, character memory 3, and dot memory 4 are input to the mixer 5 by a read signal from the synchronization signal generation circuit 10, where they are added together and output from the converter 9. Become.

The output of the converter 9 is generally input to a VTR 6, and the output is further input to a monitor 7 to obtain an image.

FIG. 2 is a schematic block diagram showing a converter 19 according to the present invention. According to the illustrated embodiment, the takes branched via mixer 5 are output to VTR 6 and monitor 7 via switches SW2 and SW4, respectively. Also, VT
Since the output signal of R6 is a composite signal consisting of a video signal and a synchronization signal, a synchronization signal separation circuit 11 is provided that can separate the synchronization signal and use it as a memory read signal. -i.e., on the one hand, VT
The synchronizing signal is completely separated from the data bus connected to the TV signal data output terminal of R6 and the switch SW3'i, and to the contact point of the switch SW1 provided between the image memory 1 and the mixer 5 on the other hand. The synchronizing signal separation circuit 11 outputs a signal that is read out to the dot memory 3 and the dot memory 4 via the switch SW5. These five switches SWI to SWI5 can be switched to contact a or contact t as shown in the figure, and operate in unison. -Also, it is connected to an external input device that can arbitrarily switch contact A or contact S.

The configuration of the illustrated embodiment is roughly as described above, with the VTR6
If you wish to record by
5 are respectively connected to the contacts a, and their operation is the same as that in FIG. Now, if you want to perform a new measurement on an image that has finished recording in this state, switch S
WI~5 are connected to the contacts, respectively. Then, V.T.
The output of R6 is fed back to the mixer 5 instead of the output ■ of the image memory 1, and the output ■ of each character and dot is a signal from the circuit 11 because the switch SW5 is connected to the contact point. It is possible to measure or program the recorded image by inputting it to the elimixer 5. The output of mixer 5 is directly input to monitor 7 and displayed. - Also, according to other embodiments, the switch S
W4 Th via other VTR6'

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of rice cultivation, and FIG. 2 is a schematic block diagram showing an embodiment of the present invention. 1 is image memory, 3σ character memory, 4 is dot memory, 5 is mixer, 6flVTR, '7 is monitor,
8 is the ultrasound diagnostic equipment body, 9 is the conventional converter, 19
is a converter according to the present invention, 1o is a synchronization signal generation circuit,
11 is a synchronous signal separation circuit.

Claims (1)

[Claims] Each data (0, ■, ■) is read out from the image memory (1), the character memory (3), and the dot memory (4) by the signal of the synchronization signal generation circuit (l()), and is read out from the mixer (5).
) is output to the VTR (6) and monitor (7), while the TV of the VTR (6)
The synchronizing signal is separated from the data bus connected to the signal output terminal and the switch (SW3) on the other hand, and to the contact point of the switch (SWI) provided between the image memory (1) and the mixer (5) on the other hand. and character memory (3
) and dot memory (4) switch (SW5)
Synchronous signal separation circuit αυ that can output readout signals via
In addition, each switch (SW2, SW4) is provided on the two branched output data buses of the mixer (5),
By interlocking and fixing these switches from the outside (contact b), the output signal of VTRC6) is connected to the mixer (5).
A digital scan converter for ultrasonic diagnostic equipment, which is characterized by being able to provide feedback to and process measurements.