JP3510231B2 - Ultrasound diagnostic equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic diagnostic apparatus, and more particularly, to an ultrasonic diagnostic apparatus capable of displaying a practical three-dimensional ultrasonic image in a short calculation time and without requiring a complicated configuration. .

[0002]

2. Description of the Related Art FIG. 9 shows an example of a conventional ultrasonic diagnostic apparatus. The ultrasonic diagnostic apparatus 500 includes an ultrasonic probe 1 that transmits an ultrasonic pulse into the subject and receives an ultrasonic echo from the inside of the subject, and a sound that scans the inside of the subject in a planar manner. The beam former 2 is provided for changing the line direction and generating a sound ray signal in each sound ray direction. Further, a B-mode processing unit 3 that generates B-mode sound ray data based on the intensity of the sound ray signal, and a CFM mode that generates CFM (color flow mapping) sound ray data based on the Doppler component of the sound ray signal. And a processing unit 3. An original sound ray memory 5 for storing the B-mode sound ray data or the CFM sound ray data (hereinafter, referred to as original sound ray data) and a DSC (digital scan converter) for converting the original sound ray data into a screen format. 9, a normal / three-dimensional display switching unit 51 for switching between normal display (dashed line) and three-dimensional display (solid line), and C
And RT10. Further, a normal display of a plurality of frames obtained by moving the ultrasonic probe 1 in a direction substantially orthogonal to the plane while planarly scanning the inside of the subject using the ultrasonic probe 1. A volume data holding unit 52 that creates and stores volume data from an image, and an address that reads out from the volume data holding unit 52 a set of data at a position that penetrates the volume data along a given line-of-sight direction are generated. The address control unit 53 and a given three-dimensional calculation method (for example, surface rendering, volume rendering, Intens
three-dimensional operation (eg, ity projection processing) on the data set to construct three-dimensional ultrasonic image data 3
A three-dimensional calculation unit 54 and a three-dimensional image memory 55 for storing the three-dimensional ultrasonic image data are provided.

FIG. 10 is a conceptual diagram of a spatial position corresponding to the original sound ray data. The original sound ray data d0 to dn of a large number of sound rays with sound ray numbers N = 0 to N = n are radially arranged to form a sector-shaped scanning plane.

FIG. 11 is a conceptual diagram of a screen format. The screen format is a two-dimensional orthogonal coordinate system defined by horizontal coordinates h and vertical coordinates v. As described above, since the original sound ray data d0 to dn form a sector-shaped scanning plane, the DSC 9 converts the format into the data of the two-dimensional orthogonal coordinate system.

FIG. 12 is an explanatory diagram of scanning for performing three-dimensional display. While scanning the inside of the subject K in a plane using the ultrasonic probe 1, the ultrasonic probe 1 is moved in a direction Zs substantially orthogonal to the plane, and the frames F0 to F0 are moved.
The original sound ray data of f is accumulated.

FIG. 13 is a conceptual diagram of spatial positions corresponding to the frames F0 to Ff. F is a frame number.
D is the distance between the frames. The scanning plane is the xy plane, and the direction orthogonal thereto is the z direction.

FIG. 14 is a conceptual diagram of the volume data Vol. DS from the original sound ray data of each frame F0 to Ff
The data of the two-dimensional orthogonal coordinate system of each frame is obtained by C9, and the volume data holding unit 52 creates volume data Vol which is the data of the three-dimensional orthogonal coordinate system from them.

FIG. 15 shows three-dimensional ultrasonic image data P.
It is a conceptual diagram of (T). The address control unit 53 and the three-dimensional calculation unit 54 perform a three-dimensional calculation on a data set located at a position that penetrates the volume data Vol along the line-of-sight direction of the left-right viewing angle T with the z direction as a reference, and The three-dimensional ultrasonic image data P (T) is constructed. The visual angle is an angle that represents the line-of-sight direction.

[0009]

In the above-mentioned conventional ultrasonic diagnostic apparatus 500, volume data Vol, which is data of a three-dimensional rectangular coordinate system, is created and the volume data Vol is obtained.
3D ultrasonic image data P
It builds (T) and displays it. However, since it is necessary to create the volume data Vol which is the data of the three-dimensional Cartesian coordinate system, there is a problem that the calculation takes time and the configuration becomes complicated. Therefore, an object of the present invention is to achieve a practical 3 in a short calculation time and without requiring a complicated configuration.
An object is to provide an ultrasonic diagnostic apparatus capable of displaying a three-dimensional ultrasonic image.

[0010]

According to a first aspect of the present invention, the present invention provides an ultrasonic probe in a direction substantially orthogonal to the plane while planarly scanning the inside of a subject using an ultrasonic probe. An ultrasonic diagnostic apparatus for generating and displaying a three-dimensional ultrasonic image of a tissue or the like of a subject viewed from a desired line of sight based on three-dimensional data obtained by moving a child. An original sound ray memory that stores original sound ray data for frames, an address control unit that can sequentially read and write the original sound ray data stored in the original sound ray memory in the depth direction, and from the original sound ray memory according to the address control unit. A three-dimensional arithmetic circuit that generates three-dimensional sound ray data using the read original sound ray data, a three-dimensional sound ray memory or line memory that stores the three-dimensional sound ray data, and the three-dimensional sound ray memory or line memory. To provide an ultrasonic diagnostic apparatus characterized by comprising a digital scan converter for format conversion the three-dimensional sound ray data stored in the re-screen format. In the ultrasonic diagnostic apparatus according to the first aspect, the volume data Vol is not created and the volume data Vol is not subjected to the three-dimensional operation, but the original sound ray data is subjected to the three-dimensional operation to obtain the three-dimensional sound ray data. I tried to generate it. For example, in the volume data Vol, xy
Data of about 500 × 500 × 50 is set in the z space (FIG. 14), but in the original sound ray data, the address (sound ray number) −
Echo time (depth) -100 x 500 x 50 in z space
It becomes data of degree. Therefore, the amount of data decreases,
It is possible to display a practical three-dimensional ultrasonic image with a short calculation time and without requiring a complicated configuration.

The original sound ray data is subjected to a three-dimensional operation to generate three-dimensional sound ray data, and the three-dimensional sound ray data is format-converted and displayed so that the distance from the ultrasonic probe is changed. It is possible to give a distorted display. Therefore, the operator can be aware of the distance from the ultrasonic probe.

In a second aspect, the present invention is characterized in that, in the ultrasonic diagnostic apparatus having the above configuration, physically the same memory can be used as the original sound ray memory, the three-dimensional sound ray memory or the line memory. An ultrasonic diagnostic apparatus is provided. In the ultrasonic diagnostic apparatus according to the second aspect, since the physically same memory is shared as the original sound ray memory, the three-dimensional sound ray memory or the line memory,
The configuration can be simplified.

According to a third aspect of the present invention, in the ultrasonic diagnostic apparatus having the above-mentioned structure, the address control unit includes the original sound ray memory and the three-dimensional sound ray memory or the line memory from the original sound ray data and the original sound ray data. The three-dimensional sound ray data is read out at the same time, and the three-dimensional arithmetic circuit uses the original sound ray data and the three-dimensional sound ray data read simultaneously to perform the three-dimensional sound ray data.
An ultrasonic diagnostic apparatus is provided which is characterized by generating three-dimensional sound ray data. In the ultrasonic diagnostic apparatus according to the third aspect, a set of original sound ray data and three-dimensional sound ray data is sequentially created and three-dimensionally calculated, so that the processing can be speeded up.

According to a fourth aspect of the present invention, in the ultrasonic diagnostic apparatus having the above structure, a line memory for temporarily storing the three-dimensional sound ray data generated by the three-dimensional arithmetic circuit, and the line memory in the line memory. An ultrasonic diagnostic apparatus comprising: an address control unit that transfers stored three-dimensional sound ray data to the three-dimensional sound ray memory at the next timing. In the ultrasonic diagnostic apparatus according to the fourth aspect, since the so-called cache memory write-back operation is performed using the line memory, the processing speed can be increased.

According to a fifth aspect of the present invention, in the ultrasonic diagnostic apparatus having the above structure, a bus used for data transfer in the B mode or the CFM mode is used to store the original sound ray data or the three-dimensional sound ray data. Provided is an ultrasonic diagnostic apparatus characterized by performing all or part of transfer. In the ultrasonic diagnostic apparatus according to the fifth aspect, since the bus is used, the structure can be simplified.

According to a sixth aspect of the present invention, in the ultrasonic diagnostic apparatus having the above structure, the three-dimensional arithmetic circuit is a RAM.
Alternatively, a LUT (look-up table) including a ROM, the LUT having the contents corresponding to the three-dimensional sound ray memory or the three-dimensional sound ray data input from the line memory, and the LUT The LUT information of the contents ignoring the three-dimensional sound ray data is stored,
An ultrasonic diagnostic apparatus is provided in which the address control unit controls which LUT information is used. In the ultrasonic diagnostic apparatus according to the sixth aspect, since the LUT is used, the processing speed can be increased. In addition, since the LUT information of the contents ignoring the three-dimensional sound ray data is stored in the LUT, the LUT can be used even in the first three-dimensional calculation in which there is no valid three-dimensional sound ray data, and the control becomes simple.

According to a seventh aspect, in the ultrasonic diagnostic apparatus of the present invention, the address control unit sets the frame number of the original sound ray data to F, the sound ray address to N, and the frame interval to D, When the left-right viewing angle is T and the adjustment amount in the left-right direction is Toffset, three-dimensional sound ray data to be read from the three-dimensional sound ray memory or the line memory in order to generate three-dimensional sound ray data from the original sound ray data. The ultrasonic diagnostic apparatus is characterized in that the sound ray address of is calculated by N + F · D · tan {T} + Toffset. In the ultrasonic diagnostic apparatus according to the seventh aspect, when the right and left viewing angle T is given, the sound ray address of the three-dimensional sound ray data paired with the original sound ray data can be calculated appropriately.

According to an eighth aspect of the present invention, in the ultrasonic diagnostic apparatus having the above-mentioned configuration, the address control unit sets the frame number of the original sound ray data to F, the depth address to M, and the frame interval to D, When the vertical viewing angle is U and the vertical adjustment amount is Uoffset, three-dimensional sound ray data to be read from the three-dimensional sound ray memory or the line memory in order to generate three-dimensional sound ray data from the original sound ray data. There is provided an ultrasonic diagnostic apparatus characterized by calculating the depth address of M + F · D · tan {U} + Uoffset. In the ultrasonic diagnostic apparatus according to the eighth aspect, when the vertical viewing angle U is given, the depth address of the three-dimensional sound ray data paired with the original sound ray data can be calculated appropriately.

In a ninth aspect of the present invention, in the ultrasonic diagnostic apparatus having the above-mentioned configuration, the original sound ray data includes a flow velocity and power obtained by B mode or color flow mapping or a flow velocity and power obtained from a second hammock. There is provided an ultrasonic diagnostic apparatus characterized by being any one or a combination thereof. In the ultrasonic diagnostic apparatus according to the ninth aspect, any one of the flow velocity and power obtained by B mode or color flow mapping, the flow velocity and power obtained from the second hammock, or a composite three-dimensional ultrasonic image thereof is displayed. You can

In the ultrasonic diagnostic apparatus according to the first and second aspects, the data transfer does not have to be sequential in the depth direction. On the other hand, in the ultrasonic diagnostic apparatus according to the third aspect to the ninth aspect, it is preferable that the data transfer is sequential in the depth direction. At that time, if the synchronous processing is performed with the number of clocks in the depth direction, the address control unit only
Alternatively, only the sound ray address and the depth start address may be transferred.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail with reference to the embodiments shown in the drawings. The present invention is not limited to this.

First Embodiment FIG. 1 shows an ultrasonic diagnostic apparatus according to the first embodiment of the present invention. The ultrasonic diagnostic apparatus 100 includes an ultrasonic probe 1 that transmits an ultrasonic pulse into the subject and receives an ultrasonic echo from the inside of the subject, and a sound that scans the inside of the subject two-dimensionally. The beam former 2 is provided for changing the line direction and generating a sound ray signal in each sound ray direction. Also,
A B-mode processing unit 3 that generates B-mode sound ray data based on the intensity of the sound ray signal, and a CFM mode processing unit 3 that generates CFM sound ray data based on the Doppler component of the sound ray signal. ing. In addition, the original sound ray data (above B
An original sound ray memory (cine memory) 5 for storing mode sound ray data or the CFM sound ray data, and an address control unit 6 capable of sequentially reading and writing the original sound ray data stored in the original sound ray memory 5 in the depth direction. A three-dimensional operation circuit 7 for generating three-dimensional sound ray data using the original sound ray data read from the original sound ray memory 5 in accordance with the address control unit 6, and a three-dimensional sound ray memory for storing the three-dimensional sound ray data. 8 and. Further, it comprises a DSC 9 for converting the original sound ray data or the three-dimensional sound ray data into a screen format, and a CRT 10.

FIG. 2 is a conceptual diagram of spatial positions corresponding to the original sound ray data. The original sound ray data d0 to dn of a large number of sound rays with sound ray numbers N = 0 to N = n are radially arranged to form a sector-shaped scanning plane. FIG. 3 is a conceptual diagram of the structure of the original sound ray memory 5. Original sound line data d
N is stored with the sound ray number N as an address for each frame.

During normal display and while accumulating original sound ray data for three-dimensional display (see FIG. 12), the original sound ray data output from the B mode processing unit 3 and the CFM processing unit 4 is the original sound ray data. The data is transferred to the memory 5, accumulated, and sent to the DSC 9. Then, in the DSC 9, the original sound ray data is format-converted into a screen format, and CR
An ultrasonic image is displayed on T10.

When the three-dimensional display is performed, the operator stops the scanning by the ultrasonic probe 1 and freezes the image display. Then, an instruction to construct a three-dimensional ultrasonic image is given. As a result, the construction of the three-dimensional ultrasonic image is started according to the parameter designated by the operator or the preset parameter. The parameters include, for example, the number f of frames of the original sound ray data, the three-dimensional calculation method, the start viewing angle,
The viewing angle range or the ending viewing angle, the number of three-dimensional ultrasonic images, and the like. First, the address control unit 6 sequentially gives the addresses of the original sound ray data d of the first frame (F = 0) to the original sound ray memory 5, and the first frame (F = 0) from the original sound ray memory 5 is given. The original sound ray data d is output. The original sound ray data d of the first frame (F = 0) is held in the three-dimensional calculation unit 7. Next, the address control unit 6 sequentially supplies the addresses of the original sound ray data d of the second frame (F = 1) to the original sound ray memory 5, and the second frame (F = 1) from the original sound ray memory 5 is given. The original sound ray data d) is output.
The three-dimensional calculation unit 7 uses the first frame (F
(3) between the original sound ray data d of (= 0) and the original sound ray data d of the input second frame (F = 1),
The three-dimensional sound ray data q is generated and held. next,
The address control unit 6 sequentially supplies the addresses of the original sound ray data d of the third frame (F = 2) to the original sound ray memory 5, and the original sound of the third frame (F = 2) from the original sound ray memory 5 is supplied. The line data d is output. The three-dimensional operation unit 7 performs a three-dimensional operation between the held three-dimensional sound ray data q and the original sound ray data d of the input third frame (F = 2), and the three-dimensional sound ray data Is generated (updated) and held. Thereafter, similarly, the three-dimensional sound ray data q is generated (updated) while inputting the original sound ray data d of the subsequent frame. Then, after processing the original sound ray data d of all the frames, the three-dimensional sound ray data q is transferred from the three-dimensional calculation unit 5 to the three-dimensional sound ray memory 8.

As shown in FIG. 4, the frame number F
= F sound ray number N = N, the sound ray address (sound ray number) of the three-dimensional sound ray data for performing three-dimensional calculation with the original sound ray data dN has a frame interval of D and a left and right viewing angle of T. , And when the amount of adjustment in the left-right direction is Toffset, it is N + F · D · tan {T} + Toffset. However, in FIG. 4, Toffset = 0. Similarly, the depth address of the three-dimensional sound ray data for performing the three-dimensional calculation with the original sound ray data of the depth M of the frame number F = F is such that the frame interval is D and the vertical viewing angle is U,
When the vertical adjustment amount is Uoffset, it is M + F · D · tan {U} + Uoffset.

As shown in FIG. 5, when the three-dimensional sound ray data Q (T) for one frame at one viewing angle T is generated, the viewing angle is changed and the above process is repeated.
The three-dimensional sound ray data Q is constructed, and the three-dimensional sound ray memory 8
Store in.

As shown in FIG. 6, the DSC 9 reads the three-dimensional sound ray data Q from the three-dimensional sound ray memory 8 frame by frame and converts the format into a screen format, and the three-dimensional ultrasonic image data P (T). Build and display them like a video.

According to the ultrasonic diagnostic apparatus 100 described above, the following effects can be obtained. (1) The volume data Vol is created, and the volume data Vol is not subjected to the three-dimensional operation. The original sound ray data d is subjected to the three-dimensional operation to generate the three-dimensional sound ray data q. The amount of data is reduced, and a practical three-dimensional ultrasonic image can be displayed in a short calculation time and without requiring a complicated configuration. (2) As understood from FIG. 6, the three-dimensional sound ray data Q
3D ultrasonic image data P after format conversion
In order to construct (T), display distortion (distortion in which the viewing angle increases as the distance increases) is applied according to the depth direction, that is, the distance from the ultrasonic probe 1. Therefore, the operator can recognize the distance from the ultrasonic probe 1 by looking at the display.

-Second Embodiment- FIG. 7 is a block diagram of an ultrasonic diagnostic apparatus 200 according to a second embodiment of the present invention. This ultrasonic diagnostic device 20
0 is 3 when the original sound ray data is read from the original sound ray memory 5.
At the same time as inputting to the dimension calculation unit 21, the original sound ray data and the three-dimensional sound ray data to be a partner for three-dimensional calculation are read from the three-dimensional sound ray memory 8 and input to the three-dimensional calculation unit 21. The three-dimensional calculation unit 21 is a RAM or R
It is an LUT composed of OM.

When the three-dimensional display is instructed after accumulating the original sound ray data in the original sound ray memory 5, the three-dimensional sound ray data q of one sound ray is generated and the same as in the first embodiment. The three-dimensional sound ray data Q of one viewing angle is repeatedly generated. Also, the viewing angle is changed to generate three-dimensional sound ray data Q at a plurality of viewing angles, and these are displayed like a moving image.

When generating the three-dimensional sound ray data q, the address control unit 6 ignores the three-dimensional sound ray data q from the three-dimensional sound ray memory 8 for the three-dimensional operation unit 21 at the first time. Specify the address of the LUT information of the contents. Also,
For the original sound ray memory 5, the address of the original sound ray data d to be the target of the three-dimensional calculation is designated. The output of the three-dimensional calculation unit 21 is temporarily held in the line memory 22 and then transferred to the three-dimensional sound ray memory 8 when the bus is vacant. From the second time, the address control unit 6 designates the address of the LUT information having the content corresponding to the three-dimensional sound ray data q from the three-dimensional sound ray memory 8 to the three-dimensional operation unit 21. Further, for the original sound ray memory 5 and the three-dimensional sound ray memory 8, the address of the original sound ray data d and the address of the three-dimensional sound ray data q which are the targets of the three-dimensional calculation are designated.
The output of the three-dimensional calculation unit 21 is temporarily held in the line memory 22 and then transferred to the three-dimensional sound ray memory 8 when the bus is vacant. When all the calculations are completed, three-dimensional display is performed.

According to the ultrasonic diagnostic apparatus 200 described above, the following effects can be obtained. (1) Since the original sound ray data d is subjected to a three-dimensional calculation to generate the three-dimensional sound ray data q, the amount of data to be processed is reduced, the calculation time is short, and a complicated configuration is not required, which is practical. It is possible to display a three-dimensional ultrasonic image. (2) Since the display is distorted according to the distance from the ultrasonic probe 1, the operator can recognize the distance from the ultrasonic probe 1 by looking at the display. (3) The three-dimensional operation can be advanced only by transferring the data.

-Third Embodiment- FIG. 8 is a block diagram of an ultrasonic diagnostic apparatus 300 according to a third embodiment of the present invention. This ultrasonic diagnostic device 30
0 is a line memory 32 local to the three-dimensional operation unit 21.
It is a configuration with. According to the ultrasonic diagnostic apparatus 300 described above, the three-dimensional operation unit 21 uses the local line memory 32 to proceed with the three-dimensional operation, and thus higher speed processing is possible.

[0035]

According to the ultrasonic diagnostic apparatus of the present invention, since the original sound ray data is subjected to a three-dimensional calculation to obtain three-dimensional sound ray data, and the three-dimensional display is performed using the sound ray data, volume data is created. The amount of data to be processed is smaller than that of, and it becomes possible to display a practical three-dimensional ultrasonic image in a short calculation time and without requiring a complicated configuration.

[Brief description of drawings]

FIG. 1 is a block diagram of an ultrasonic diagnostic apparatus according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram of spatial positions corresponding to original sound ray data.

FIG. 3 is a structural conceptual diagram of an original sound line memory.

FIG. 4 is an explanatory diagram of correspondence between addresses of original sound ray data for performing three-dimensional calculation and addresses of three-dimensional sound ray data.

FIG. 5 is an explanatory diagram of three-dimensional sound ray data for one frame.

FIG. 6 is an explanatory diagram of three-dimensional ultrasonic image data obtained by format-converting three-dimensional sound ray data for one frame.

FIG. 7 is a block diagram of an ultrasonic diagnostic apparatus according to a second embodiment of the present invention.

FIG. 8 is a block diagram of an ultrasonic diagnostic apparatus according to a third embodiment of the present invention.

FIG. 9 is a block diagram of an example of a conventional ultrasonic diagnostic apparatus.

FIG. 10 is a conceptual diagram of a spatial position corresponding to original sound ray data.

FIG. 11 is a conceptual diagram of a screen format.

FIG. 12 is an explanatory diagram of scanning for performing three-dimensional display.

FIG. 13 is a conceptual diagram of spatial positions corresponding to a plurality of frames.

FIG. 14 is a conceptual diagram of volume data.

FIG. 15 is a conceptual diagram of three-dimensional calculation on volume data and three-dimensional ultrasonic image data.

[Explanation of symbols]

100, 200, 300 Ultrasonic diagnostic device 1 Ultrasonic probe 5 Original sound ray memory 6 Address control section 7, 21 Three-dimensional calculation section 8 Three-dimensional sound ray memory 9 DSC 10 CRT 22, 32 Line memory d0, dN, dn Original sound ray data q0, qN, qn Three-dimensional sound ray data Q (T) Three-dimensional sound ray data P (T) for one frame Three-dimensional ultrasonic image data for one frame

Front Page Continuation (72) Inventor Koji Miyama 127 GE at 4-7 Asahigaoka, Hino City, Tokyo GE Yokogawa Medical Systems Co., Ltd. Yokogawa Medical System Co., Ltd. (56) Reference JP 7-213521 (JP, A) JP 4-297244 (JP, A) JP 7-194597 (JP, A) JP 7- 184905 (JP, A) JP-A-7-163558 (JP, A) JP-A-6-14923 (JP, A) JP-A-5-228146 (JP, A) JP-A-60-63034 (JP, A) JP-A-53-33684 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61B 8 / 00-8 / 15

Claims (9)

(57) [Claims] 1. Three-dimensional data obtained by moving an ultrasonic probe in a direction substantially orthogonal to the plane while planarly scanning the inside of a subject using the ultrasonic probe. An ultrasonic diagnostic apparatus for generating and displaying a three-dimensional ultrasonic image as if the inside of the subject was viewed from a desired line-of-sight direction based on an original sound ray memory for storing original sound ray data for a plurality of frames, and An address control unit capable of sequentially reading and writing the original sound ray data stored in the original sound ray memory in the sound ray direction, and generating three-dimensional sound ray data using the original sound ray data read from the original sound ray memory according to the address control unit. And a three-dimensional sound ray memory or line memory for storing the three-dimensional sound ray data, and a screen for displaying the three-dimensional sound ray data stored in the three-dimensional sound ray memory or line memory. The address control unit has a frame number of the original sound ray data as F, a sound ray address as N, a frame interval as D, a left and right viewing angle as T, and a left and right direction. When the adjustment amount is Toffset, the sound ray address of the three-dimensional sound ray data to be read from the three-dimensional sound ray memory or the line memory to generate the three-dimensional sound ray data from the original sound ray data is N + F · D An ultrasonic diagnostic apparatus characterized by being calculated by tan {T} + Toffset. 2. The ultrasonic diagnostic apparatus according to claim 1, wherein the address control unit includes the original sound ray memory and the three-dimensional sound ray memory or the original sound ray data and the three-dimensional sound ray data from the line memory. The ultrasonic diagnostic apparatus is characterized in that the three-dimensional arithmetic circuit generates the three-dimensional sound ray data using the simultaneously read original sound ray data and three-dimensional sound ray data. 3. The ultrasonic diagnostic apparatus according to claim 2, wherein the line memory temporarily stores the three-dimensional sound ray data generated by the three-dimensional arithmetic circuit, and the three-dimensional stored in the line memory. An ultrasonic diagnostic apparatus, comprising: an address control unit that transfers sound ray data to the three-dimensional sound ray memory via the bus when the bus is vacant. 4. The ultrasonic diagnostic apparatus according to claim 2 or 3, wherein the three-dimensional arithmetic circuit is an LUT including a RAM or a ROM, and the LUT includes the three-dimensional sound ray memory. Alternatively, LUT information having contents corresponding to the three-dimensional sound ray data input from the line memory and LUT information having contents ignoring the three-dimensional sound ray data are stored. Which LUT information is used is the address. An ultrasonic diagnostic apparatus characterized by being controlled by a control unit. 5. The ultrasonic diagnostic apparatus according to claim 1, wherein the address control unit has a depth address of M, a vertical viewing angle of U, and a vertical adjustment amount of Uoffset,
The depth address of the three-dimensional sound ray data to be read from the three-dimensional sound ray memory or the line memory in order to generate the three-dimensional sound ray data from the original sound ray data is calculated by M + F · D · tan {U} + Uoffset An ultrasonic diagnostic apparatus characterized by: 6. Three-dimensional data obtained by moving the ultrasonic probe in a direction substantially orthogonal to the plane while planarly scanning the inside of the subject using the ultrasonic probe. An ultrasonic diagnostic apparatus for generating and displaying a three-dimensional ultrasonic image as if the inside of the subject was viewed from a desired line-of-sight direction based on an original sound ray memory for storing original sound ray data for a plurality of frames, and An address control unit capable of sequentially reading and writing the original sound ray data stored in the original sound ray memory in the sound ray direction, and generating three-dimensional sound ray data using the original sound ray data read from the original sound ray memory according to the address control unit. And a three-dimensional sound ray memory or line memory for storing the three-dimensional sound ray data, and a screen for displaying the three-dimensional sound ray data stored in the three-dimensional sound ray memory or line memory. And a digital scan converter for format conversion into a format, wherein the address control unit has a frame number F of the original sound ray data, a depth address M, a frame interval D, a vertical viewing angle U, and a vertical direction. When the adjustment amount is Uoffset, the depth address of the three-dimensional sound ray data to be read from the three-dimensional sound ray memory or the line memory in order to generate the three-dimensional sound ray data from the original sound ray data is M + F · D An ultrasonic diagnostic apparatus characterized in that it is calculated by tan {U} + Uoffset. 7. The ultrasonic diagnostic apparatus according to claim 6, wherein the address control unit includes the original sound ray memory and the three-dimensional sound ray memory or the original sound ray data and the three-dimensional sound ray data from the line memory. The ultrasonic diagnostic apparatus is characterized in that the three-dimensional arithmetic circuit generates the three-dimensional sound ray data using the simultaneously read original sound ray data and three-dimensional sound ray data. 8. The ultrasonic diagnostic apparatus according to claim 7, wherein the line memory temporarily stores the three-dimensional sound ray data generated by the three-dimensional arithmetic circuit, and the three-dimensional stored in the line memory. An ultrasonic diagnostic apparatus, comprising: an address control unit that transfers sound ray data to the three-dimensional sound ray memory via the bus when the bus is vacant. 9. The ultrasonic diagnostic apparatus according to claim 7, wherein the three-dimensional arithmetic circuit is an LUT including a RAM or a ROM, and the LUT includes the three-dimensional sound ray memory. Alternatively, LUT information having contents corresponding to the three-dimensional sound ray data input from the line memory and LUT information having contents ignoring the three-dimensional sound ray data are stored. Which LUT information is used is the address. An ultrasonic diagnostic apparatus characterized by being controlled by a control unit.