Ultrasound system and control method of ultrasound system

1. An ultrasound system in which an ultrasound probe and an information terminal are wirelessly connected,

wherein the ultrasound probe includes

a transducer array,

a probe-side processor that causes the transducer array to transmit an ultrasonic wave, performs reception focusing processing on a reception signal output from the transducer array that has received an ultrasound echo to generate a sound ray signal, and generates image information data on the basis of the sound ray signal generated,

a probe-side cine-memory that stores the image information data generated by the probe-side processor, and

a probe-side wireless communication circuit that wirelessly transmits the image information data generated by the probe-side processor,

the information terminal includes

a monitor,

an input device,

a terminal-side wireless communication circuit that receives the image information data wirelessly transmitted from the probe-side wireless communication circuit, and

a terminal-side processor that displays an ultrasound image on the monitor on the basis of the image information data received by the terminal-side wireless communication circuit, and

in a case where a freeze mode is designated on the basis of an instruction input from the input device and transmission of the ultrasonic wave from the transducer array is stopped, the image information data of past frames stored in the probe-side cine-memory is wirelessly transmitted from the probe-side wireless communication circuit, and the terminal-side processor displays the ultrasound image on the monitor on the basis of the image information data of the past frames wirelessly transmitted from the probe-side wireless communication circuit after transmission of the ultrasonic wave from the transducer array is stopped and received by the terminal-side wireless communication circuit.

2. The ultrasound system according to claim 1 ,

wherein the probe-side processor further adjusts whether to output the image information data of all the frames generated or to output the image information data generated by omitting the image information data of at least a part of the frames, according to fluctuations in a wireless transmission band by the probe-side wireless communication circuit, and

in a case where a live mode is designated on the basis of the instruction input from the input device and transmission of the ultrasonic wave from the transducer array is started, the image information data adjusted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit, and the terminal-side processor displays the ultrasound image on the monitor on the basis of the image information data received by the terminal-side wireless communication circuit.

3. The ultrasound system according to claim 2 ,

wherein the information terminal further includes a terminal-side cine-memory that stores the image information data received by the terminal-side wireless communication circuit,

in the case of the live mode, the image information data adjusted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit, and the image information data received by the terminal-side wireless communication circuit is stored in the terminal-side cine-memory, and

in the case of the freeze mode, the image information data of the at least a part of frames omitted by the probe-side processor is read from the probe-side cine-memory, and is wirelessly transmitted from the probe-side wireless communication circuit, the image information data of the at least a part of frames received by the terminal-side wireless communication circuit is stored in the terminal-side cine-memory, and the terminal-side processor displays the ultrasound image on the monitor on the basis of the image information data stored in the terminal-side cine-memory.

4. The ultrasound system according to claim 3 ,

wherein immediately after the freeze mode is designated, the image information data of the at least a part of frames omitted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit.

5. The ultrasound system according to claim 3 ,

wherein on the basis of the instruction input from the input device, the ultrasound image of a frame in the vicinity of the at least a part of frames of the image information data omitted by the probe-side processor is designated from the image information data stored in the terminal-side cine-memory, and immediately after the ultrasound image is displayed on the monitor on the basis of the designated image information data of the frame in the vicinity of the omitted at least a part of frames, the image information data of the at least a part of frames omitted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit.

6. The ultrasound system according to claim 3 ,

wherein in the case of the freeze mode, the at least a part of frames of the image information data omitted by the probe-side processor is detected from the image information data stored in the terminal-side cine-memory, and the image information data of the at least a part of frames omitted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit on the basis of the detected at least a part of frames of the image information data.

7. The ultrasound system according to claim 6 ,

wherein detection of the at least a part of frames of the image information data omitted by the probe-side processor is sequentially performed for the frame of the image information data pointed to by a scan pointer, from the frame of the image information data corresponding to the ultrasound image being displayed on the monitor toward the past frame of the image information data among the image information data stored in the terminal-side cine-memory.

8. The ultrasound system according to claim 7 ,

wherein in a case where the frame of the image information data pointed to by the scan pointer is moved to the past frame of the image information data earlier than the frame of the ultrasound image being displayed on the monitor on the basis of the instruction input from the input device, the frame of the image information data pointed to by the scan pointer is changed to the moved past frame of the image information data, and the detection of the at least a part of frames of the image information data omitted by the probe-side processor is sequentially performed for the frame of the image information data pointed to by the scan pointer, from the changed past frame of the image information data pointed to by the scan pointer toward the latest frame of the image information data, and

in a case where the frame of the image information data pointed to by the scan pointer reaches the latest frame of the image information data, the frame of the image information data pointed to by the scan pointer is changed to the moved past frame of the image information data, and the detection of the at least a part of frames of the image information data omitted by the probe-side processor is sequentially performed for the frame of the image information data pointed to by the scan pointer, from the changed past frame of the image information data pointed to by the scan pointer toward the past frame of the image information data which is further earlier than the changed past frame of the image information data.

9. The ultrasound system according to claim 3 ,

wherein in the case of the live mode, the probe-side processor generates an omitted frame list for managing the at least a part of frames of the image information data omitted from the image information data wirelessly transmitted by the probe-side wireless communication circuit, and

in the case of the freeze mode, the image information data of the at least a part of frames omitted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit on the basis of the omitted frame list generated by the probe-side processor.

10. The ultrasound system according to claim 3 ,

wherein the number of frames of the image information data to be stored in the probe-side cine-memory and the number of frames of the image information data to be stored in the terminal-side cine-memory are matched by deciding the number of frames of the image information data to be stored in one of the probe-side cine-memory and the terminal-side cine-memory, which has a larger memory capacity, in accordance with one of the probe-side cine-memory and the terminal-side cine-memory, which has a smaller memory capacity.

11. The ultrasound system according to claim 3 ,

wherein in the case of the live mode, the image information data of all the frames generated by the probe-side processor is stored in the probe-side cine-memory, and

in the case of the freeze mode, the image information data of the frame wirelessly transmitted from the probe-side wireless communication circuit and the image information data of the frame for which reception confirmation is notified from the information terminal are deleted from the probe-side cine-memory.

12. The ultrasound system according to claim 11 ,

wherein in the case of the live mode, the image information data of the frame deleted from the terminal-side cine-memory is deleted from the probe-side cine-memory.

13. The ultrasound system according to claim 11 ,

wherein the probe-side cine-memory generates a free space management list for managing a free space of the probe-side cine-memory in the case of the freeze mode,

in the case of the freeze mode, a frame region of the probe-side cine-memory where the image information data of the frame deleted from the probe-side cine-memory is stored is the free space in the free space management list, and

in the case of the live mode, the image information data of each frame generated by the probe-side processor is sequentially stored from the frame region of the probe-side cine-memory corresponding to a head free space of the free space management list.

14. The ultrasound system according to claim 3 ,

wherein in the case of the live mode, only the image information data of the at least a part of frames omitted by the probe-side processor is stored in the probe-side cine-memory, and

in the case of the freeze mode, the image information data of the frame for which reception confirmation is notified from the information terminal is deleted from the probe-side cine-memory.

15. The ultrasound system according to claim 14 ,

wherein the probe-side processor further issues an error when the probe-side cine-memory becomes full in the case of the live mode.

16. The ultrasound system according to claim 3 ,

wherein the probe-side processor generates image signal data before imaging into the ultrasound image on the basis of the sound ray signal generated, and generates the ultrasound image as the image information data on the basis of the image signal data generated, and

the terminal-side processor displays the ultrasound image received by the terminal-side wireless communication circuit on the monitor.

17. The ultrasound system according to claim 3 ,

wherein the probe-side processor generates image signal data before imaging into the ultrasound image as the image information data on the basis of the sound ray signal generated,

the terminal-side processor further generates the ultrasound image on the basis of the image signal data received by the terminal-side wireless communication circuit, and displays the ultrasound image generated on the monitor.

18. The ultrasound system according to claim 17 ,

wherein the terminal-side cine-memory stores the ultrasound image generated by the terminal-side processor.

19. A control method of an ultrasound system in which an ultrasound probe and an information terminal are wirelessly connected, the control method comprising:

a step of causing a transducer array to transmit an ultrasonic wave, and performing reception focusing processing on a reception signal output from the transducer array that has received an ultrasound echo to generate a sound ray signal, by a probe-side processor of the ultrasound probe;

a step of generating image information data on the basis of the generated sound ray signal, by the probe-side processor of the ultrasound probe;

a step of storing the generated image information data, by a probe-side cine-memory of the ultrasound probe;

a step of wirelessly transmitting the generated image information data, by a probe-side wireless communication circuit of the ultrasound probe;

a step of receiving the wirelessly transmitted image information data, by a terminal-side wireless communication circuit of the information terminal; and

a step of displaying an ultrasound image on a monitor on the basis of the received image information data, by a terminal-side processor of the information terminal,

wherein in a case where a freeze mode is designated on the basis of an instruction input from an input device and transmission of the ultrasonic wave from the transducer array is stopped, the image information data of past frames stored in the probe-side cine-memory is wirelessly transmitted from the probe-side wireless communication circuit, and the terminal-side processor displays the ultrasound image on the monitor on the basis of the image information data of the past frames wirelessly transmitted from the probe-side wireless communication circuit after transmission of the ultrasonic wave from the transducer array is stopped and received by the terminal-side wireless communication circuit.

20. The control method of an ultrasound system according to claim 19 , further comprising:

a step of adjusting whether to output the image information data of all the frames generated or to output the image information data generated by omitting the image information data of at least a part of the frames, according to fluctuations in a wireless transmission band by the probe-side wireless communication circuit, by the probe-side processor of the ultrasound probe,

wherein in a case where a live mode is designated on the basis of the instruction input from the input device and transmission of the ultrasonic wave from the transducer array is started, the image information data adjusted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit, and the terminal-side processor displays the ultrasound image on the monitor on the basis of the image information data received by the terminal-side wireless communication circuit.

21. The control method of an ultrasound system according to claim 20 , further comprising:

a step of storing the image information data received by the terminal-side wireless communication circuit, by a terminal-side cine-memory of the information terminal,

wherein in the case of the live mode, the image information data adjusted by the probe-side processor is wirelessly transmitted from the probe-side wireless communication circuit, and the image information data received by the terminal-side wireless communication circuit is stored in the terminal-side cine-memory, and

in the case of the freeze mode, the image information data of the at least a part of frames omitted by the probe-side processor is read from the probe-side cine-memory, and is wirelessly transmitted from the probe-side wireless communication circuit, the image information data of the at least a part of frames received by the terminal-side wireless communication circuit is stored in the terminal-side cine-memory, and the terminal-side processor displays the ultrasound image on the monitor on the basis of the image information data stored in the terminal-side cine-memory.

22. The control method of an ultrasound system according to claim 21 ,

wherein in the case of the live mode, the image information data of all the frames generated by the probe-side processor is stored in the probe-side cine-memory, and

in the case of the freeze mode, the image information data of the frame wirelessly transmitted from the probe-side wireless communication circuit and the image information data of the frame for which reception confirmation is notified from the information terminal are deleted from the probe-side cine-memory.

23. The control method of an ultrasound system according to claim 21 ,

wherein in the case of the live mode, only the image information data of the at least a part of frames omitted by the probe-side processor is stored in the probe-side cine-memory, and

in the case of the freeze mode, the image information data of the frame for which reception confirmation is notified from the information terminal is deleted from the probe-side cine-memory.