JPS6154414B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic diagnostic apparatus that can display the range in which the M-mode image is displayed with a marker on the B-mode image when simultaneously displaying a B-mode image and an M-mode image. It is something.

Conventionally, when simultaneously displaying a B-mode image and an M-mode image, for example, as shown in FIG.
When displaying the M-mode image 11 as shown in FIG. 1b superimposed on the B-mode image 10 in FIG.
A technique has been used in which the portion where 1 is displayed is displayed on the B-mode image 10 by a marker 12 such as a single bright line.

In this case, the marker 12 on the B-mode image 10 is
Although it represents the position where the M-mode image 11 is displayed on the B-mode image 10, it is completely unclear what range of the part that is actually displayed, that is, from where to what depth is being displayed. be. In particular, when displaying deep parts from the body surface with M mode images, it is generally done to display only the deep parts by delaying the sweep signal. As mentioned above, it becomes even more important which range on the B-mode image is displayed as the M-mode image.

The present invention was made in view of the above circumstances, and
When simultaneously displaying a B-mode image and an M-mode image, the M-mode image displayed superimposed on the B-mode image
It is an object of the present invention to provide an ultrasonic diagnostic apparatus that can display the position and range (depth) where an M-mode image is displayed using a mode marker.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing an embodiment of the present invention, in which 20 is an ultrasonic probe, 21 is a wave transmitting/receiving circuit,
22 is a control circuit for simultaneous display of B mode and M mode and a control unit that generates various signals; 23 is a B mode;
24 is a B-mode monitor, 25 is an M-mode sweep signal generator, 26 is an M-mode monitor, 27 is an M-mode display position (depth direction) adjuster, and 28 is a B-mode monitor. This is an adjuster for selecting the position where M mode is taken.

FIG. 3 is a timing chart of FIG. 2, in which A represents the timing of ultrasonic transmission and reception, B represents the timing of M mode sweep, C represents the timing of B mode sweep, and D represents the brightness modulation signal of the M mode marker.

Figure 4 is a partially enlarged view of the timing chart in Figure 3, showing only the timing of the M mode sweep, and E and F are the M mode sweep and brightness modulation signal when a delay is applied to the M mode sweep. Show relationships.

FIG. 5 is a diagram showing an example of displaying a B-mode image according to the present invention, where 10 is a B-mode image and 12 is an M-mode marker.

The operation of the present invention will be explained below.

Generally, when displaying B mode and M mode simultaneously in an ultrasonic tomographic diagnostic device using real-time images, as shown in the timing chart shown in Figure 3, the B mode sweep signal of C is adjusted to the rate of ultrasonic transmission and reception of A. A system is used in which a portion of the generated signal is used for the sweep for the B M mode. The method of the present invention is to display a range corresponding to the M mode actually displayed on the monitor as a bright line on the B mode cross section in accordance with the timing of the M mode sweep of B, and D represents the brightness modulation signal. ing. FIG. 5 shows an example of B-mode display according to the method of the present invention, where 10 is a B-mode tomographic image, 12 is an M-mode marker, and the position and range (depth) of M-mode are displayed by bright lines. Ru.

Figure 4 shows only the timing part of the M mode sweep in Figure 3, and the width of the D brightness modulation signal matches the width (depth direction) of the M mode displayed on the M mode monitor. , which changes in conjunction with switching of a scale factor (screen size) not shown, and always matches the display width (depth direction) of the M-mode monitor. With this brightness modulation signal, B
By applying brightness modulation to the mode sweep,
The portion displayed in M mode on the B mode image can be displayed as a bright line. Furthermore, as shown in Figure 4 E, M
If you want to display a deep part by delaying the mode sweep, the brightness modulation signal of F should also be
Therefore, B
The marker on the mode image also moves (in the depth direction).

In FIG. 2, reference numeral 22 denotes a control section that switches between B mode and M mode signals and generates various signals, and the luminance modulation signal described above is also generated and mixed in this section. Reference numeral 21 denotes an ultrasonic wave transmitter/receiver, which transmits and receives ultrasonic waves from 20 probes. 23 is a B-mode sweep signal generation circuit, which displays a B-mode image on the monitor 24; 24 is an M-mode sweep signal generation circuit, which displays an M-mode image on the monitor 26; Reference numeral 27 denotes an adjuster for applying a delay to the M-mode sweep, and in conjunction with this adjuster, the luminance modulation signal in 22 is also delayed. 28
is an adjuster for moving the position where the M mode is taken on the B mode tomographic image, and with this, the position where the M mode is taken on the B mode can be arbitrarily selected.

In the description of the embodiments of the present invention, the sector scan method is used as an example of B mode display, but it goes without saying that the linear scan method is also the same. Furthermore, although the present invention uses bright lines as markers on the B-mode image, other marks (+ marks, etc.) may also be used. Particularly in the case of multi-channel display, channels can be distinguished at the same time by changing the marker display method.

As explained above, in the present invention, markers are displayed from the M mode display start position, so it is easy to determine from which depth the M mode image being displayed is based on the marker displayed on the B mode image. Prove. Therefore, even if the M-mode image is displayed to the fullest display width, the depth at which the M-mode image was obtained can be known.

[Brief explanation of the drawing]

1A and 1B are explanatory diagrams showing conventional display examples, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG.
Figure 4 is the timing chart of Figure 2, and Figure 5 is the timing chart of Figure 2.
The figure is an explanatory diagram showing a display example according to the present invention. 10...B-mode image, 12...marker, 20...
...probe, 21 ... transducer, 22 ... control section, 24 ... monitor for B mode, 23 ... B mode sweep signal generation circuit, 25 ... M mode sweep signal generation circuit, 26 ... for M mode monitor,
27...Delay adjuster, 28...M mode position adjuster.

Claims (1)

[Claims] 1. In an ultrasonic diagnostic apparatus that displays a B-mode image and an M-mode image simultaneously, a first adjustment section that selects the position where the M-mode image is taken in the B-mode image and a display start position of the M-mode image are set in the depth direction. an M-mode display section that displays only the M-mode image from the display start position set by the second adjustment section; 1. An ultrasonic diagnostic apparatus comprising: a marker display section that displays a marker from a display start position set by the section.