阅读说明：本技术 超声波诊断装置以及体数据取入方法 (Ultrasonic diagnostic apparatus and volume data acquisition method ) 是由 平井孝则 于 2019-03-22 设计创作，主要内容包括：本发明提供一种超声波诊断装置和体数据取入方法。在超声波探针的手动扫描中,自然地取入所需的帧数据列。在S40中,判定从非接触状态向接触状态的变化。在S42中依次取入帧数据直到在S44中判定从接触状态向非接触状态的变化为止。体数据由所取入的多个帧数据构成。在所取入的帧数据的张数较少的情况下,在S48中执行错误处理。在判定取入结束后,在S50中自动地执行体数据处理。(The invention provides an ultrasonic diagnostic apparatus and a volume data acquisition method. In the manual scanning of the ultrasonic probe, a desired frame data sequence is naturally acquired. In S40, a change from the non-contact state to the contact state is determined. The frame data is sequentially fetched in S42 until a change from the contact state to the non-contact state is determined in S44. The volume data is composed of a plurality of captured frame data. If the number of pieces of frame data to be captured is small, error processing is executed in S48. After the completion of the acquisition is determined, the volume data processing is automatically executed in S50.)

1. An ultrasonic diagnostic apparatus characterized by comprising:

an ultrasonic probe that transmits and receives ultrasonic waves;

a state recognition unit that recognizes a non-contact state in which the ultrasonic probe is separated from a living body and a contact state in which the ultrasonic probe is in contact with the living body, based on frame data sequentially obtained by transmission and reception of the ultrasonic waves; and

and a control unit that determines the start of capturing a frame data sequence obtained by manual scanning of the ultrasonic probe based on a 1 st state change from the non-contact state to the contact state.

2. The ultrasonic diagnostic apparatus according to claim 1,

the control unit further determines that the capturing of the frame data sequence is completed based on a 2 nd state change from the contact state to the non-contact state.

3. The ultrasonic diagnostic apparatus according to claim 2,

the control unit further determines, based on the 2 nd state change, a start of processing for volume data as the frame data sequence.

4. The ultrasonic diagnostic apparatus according to claim 3,

the processing for the volume data is calibration processing for matching the coordinate system of the volume data with the coordinate system of the other volume data.

5. The ultrasonic diagnostic apparatus according to claim 2,

the control unit executes error processing when it is determined that the 2 nd state change occurs during the manual scanning after the start of the capturing.

6. The ultrasonic diagnostic apparatus according to claim 1,

the state recognition unit includes:

a sampling unit that samples a plurality of luminance value rows corresponding to a plurality of depths in accordance with the frame data;

a normalization unit that normalizes the luminance value sequence; and

a determination unit that determines the non-contact state and the contact state based on the normalized plurality of luminance value sequences.

7. The ultrasonic diagnostic apparatus according to claim 6,

the normalization unit includes:

a unit that calculates a reference value based on the luminance value sequence in accordance with the luminance value sequence; and

and a unit for normalizing the plurality of luminance values constituting the luminance value sequence by the reference value, according to the luminance value sequence.

8. The ultrasonic diagnostic apparatus according to claim 1,

the state identifying unit identifies the non-contact state and the contact state based on at least two frame data spatially arranged.

9. The ultrasonic diagnostic apparatus according to claim 1,

the ultrasonic diagnostic apparatus includes a display unit that displays an indicator indicating a state of at least one of the non-contact state and the contact state recognized by the state recognition unit.

10. A volume data acquisition method comprising the steps of:

recognizing, based on frame data sequentially acquired by an ultrasonic probe, a non-contact state in which the ultrasonic probe is separated from a living body and a contact state in which the ultrasonic probe is in contact with the living body;

determining a start of acquisition of volume data based on a 1 st state change from the non-contact state to the contact state, the volume data being composed of a frame data sequence obtained by manual scanning of the ultrasonic probe; and

determining that the capturing of the volume data is completed and determining that the processing of the volume data is started based on a 2 nd state change from the contact state to the non-contact state.

Technical Field

The present invention relates to an ultrasonic diagnostic apparatus and a volume data acquisition method, and more particularly to control of volume data acquisition.

Background

Ultrasonic diagnostic apparatuses are widely used in the medical field. An ultrasonic diagnostic apparatus forms an ultrasonic image based on data obtained by transmitting and receiving ultrasonic waves to and from a living body. Ultrasonic diagnostic apparatuses are also used in surgical operations. For example, the probe is brought into contact with a surface of a liver exposed after an open abdomen during an operation, and ultrasonic diagnosis is performed on the liver in this state. Patent document 1 discloses an intraoperative probe.

In recent years, ultrasonic diagnostic apparatuses having an RVS (Real-time Virtual sonograph) function have become widespread, and their effective use is expected. According to the RVS function, for example, a real-time tomographic image showing a certain cross section in a living body and other tomographic images (CT image, MRI image, etc.) showing the same cross section can be simultaneously observed. Calibration is performed prior to utilizing the RVS function. The calibration is performed to match or match the coordinate system of volume data (or frame data) acquired by the ultrasound diagnostic apparatus with the coordinate system of volume data acquired by another medical apparatus.

The ultrasonic diagnostic apparatus disclosed in patent document 2 has a function of determining whether the ultrasonic probe is in contact with the living body or whether the ultrasonic probe is separated from the living body.

Patent document 1: japanese patent laid-open publication No. 2003-334190

Patent document 2: international publication No. 2017/038162

Disclosure of Invention

The ultrasound probe is manually scanned over the body surface for calibration of coordinate systems, volume rendering, and other purposes. By this manual scanning, a frame data sequence, that is, volume data is acquired. In this case, when the user is instructed to start and end acquisition of the frame data sequence, the user is likely to be burdened with operations and confused. For example, in a surgical operation, a person who generally performs an operation of an ultrasonic probe is different from a person who performs an operation of an ultrasonic diagnostic apparatus. Therefore, it is not easy to match the timing between the manual scanning of the ultrasonic probe and the input to the ultrasonic diagnostic apparatus (for example, input of the acquisition start and the acquisition end). It is desirable that the necessary frame data sequence be naturally captured without being a burden on the user during manual scanning of the ultrasonic probe. Patent document 2 describes a technique for assisting manual scanning of an ultrasonic probe or acquisition of volume data.

The invention aims to provide a technology capable of naturally taking in required frame data sequence in the manual scanning process of an ultrasonic probe.

An ultrasonic diagnostic apparatus of the present invention includes: an ultrasonic probe that transmits and receives ultrasonic waves; a state recognition unit that recognizes a non-contact state in which the ultrasonic probe is separated from a living body and a contact state in which the ultrasonic probe is in contact with the living body, based on frame data sequentially obtained by transmission and reception of the ultrasonic waves; and a control unit that determines the start of capturing a frame data sequence obtained by manual scanning of the ultrasonic probe based on a 1 st state change from the non-contact state to the contact state.

The volume data acquisition method of the present invention includes the following steps: recognizing, based on frame data sequentially acquired by an ultrasonic probe, a non-contact state in which the ultrasonic probe is separated from a living body and a contact state in which the ultrasonic probe is in contact with the living body; determining a start of acquisition of volume data based on a 1 st state change from the non-contact state to the contact state, the volume data being composed of a frame data sequence obtained by manual scanning of the ultrasonic probe; and determining that the acquisition of the volume data is completed and that the processing of the volume data is started based on a 2 nd state change from the contact state to the non-contact state.

According to the present invention, since a necessary frame data sequence is naturally acquired in the manual scanning process of the ultrasonic probe, the burden on the user can be reduced.

Drawings

Fig. 1 is a block diagram showing an ultrasonic diagnostic apparatus according to an embodiment.

Fig. 2 is a diagram showing an example of the sample point array.

Fig. 3 is a diagram for explaining a calculation method of the sampling point array.

Fig. 4 is a flowchart showing a processing method of a luminance value sequence.

Fig. 5 is a diagram for explaining the normalization processing.

Fig. 6 is a diagram for explaining a contact and non-contact identification method.

Fig. 7 is a flowchart showing a volume data acquisition method according to the embodiment.

Fig. 8 is a diagram showing an example of the indicator.

Fig. 9 is a diagram for explaining the calibration process.

Detailed Description

Hereinafter, embodiments will be described based on the drawings.

(1) Brief description of the embodiments