Triggered scanning device and triggered scanning system

Abstract

The application relates to a device and a system for triggering scanning. The device comprises a frequency demultiplexer for splitting an electromagnetic wave signal generated by an oscillation source into a first signal and a second signal; a first power divider for splitting the first signal into first sub-signals for being sent to each transceiving antenna; a transceiving antenna for radiating electromagnetic waves to a target site based on the first sub-signals and sending echo signals reflected by the target site based on the electromagnetic waves to a receiving end; the receiving end for obtaining target motion signals corresponding to each transceiving antenna and sent to the receiving end according to the second signal and each echo signal; and a collecting end for determining a target transceiving antenna from the multiple transceiving antennas based on each target motion signal. In the embodiment of the application, the multiple transceiving antennas can be used to detect echo signals in a larger area, and the most suitable target transceiving antenna can be found in a short time without multiple adjustments of the antenna, thereby effectively improving the use experience of non-contact scanning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a device for triggering scanning and a system for triggering scanning. BACKGROUND

[0002] When a medical imaging device acquires an image of a moving part, it mainly relies on the detection of the movement of the part by an external device, so as to trigger the medical imaging device to scan a clear image. For example, an Electrocardiogram (ECG) device is used to monitor the movement of the heart to obtain a movement signal.

[0003] Currently, the detection of movement by an external device mainly includes contact devices and non-contact devices. However, the contact device needs to paste electrode patches, and the process is relatively complicated. For the operator, professional training is also required. For the non-contact device, before using the radar based on the Doppler effect to detect, the position of a single antenna in the radar needs to be adjusted to obtain an effective movement signal, so there is a problem of complex operation. SUMMARY

[0004] Therefore, it is necessary to provide a device for triggering scanning and a system for triggering scanning which can reduce the complexity of operation.

[0005] In a first aspect, the present application provides a device for triggering scanning, the device comprising a transmitting end, a receiving end and an acquisition end, the transmitting end comprising an oscillation source, a transducer, a first power divider and a plurality of transceiving antennas; the plurality of transceiving antennas are encapsulated inside an antenna blanket;

[0006] The transducer is configured to split an electromagnetic wave signal generated by the oscillation source to obtain a first signal and a second signal;

[0007] The first power divider is configured to split the first signal to obtain a first sub-signal sent to each of the transceiving antennas;

[0008] The transceiving antennas are configured to radiate electromagnetic waves to a target part based on the first sub-signal, and send a backwave signal reflected by the target part based on the electromagnetic waves to the acquisition end;

[0009] The receiving end is configured to obtain a target movement signal corresponding to each of the transceiving antennas and sent to the acquisition end according to the second signal and each of the backwave signals;

[0010] The acquisition end is configured to determine a target transceiving antenna from the plurality of transceiving antennas based on each of the target movement signals.

[0011] In one of the embodiments, the receiving end comprises a second power divider and a frequency mixing demodulator;

[0012] the transceiving antenna, configured to send each of the echo signals to the mixed-frequency demodulator;

[0013] the second power divider, configured to split the second signal to obtain a second sub-signal corresponding to each of the echo signals;

[0014] the mixed-frequency demodulator, configured to perform mixed-frequency demodulation processing on each of the echo signals and the second sub-signal corresponding to the echo signal to obtain each of the target motion signals sent to the acquisition end.

[0015] In one of the embodiments, the acquisition end comprises a signal processing module.

[0016] The signal processing module is configured to determine a target digital motion signal from each of the target motion signals according to amplitude information of each of the target motion signals, and take a transceiving antenna corresponding to the target digital motion signal as the target transceiving antenna.

[0017] In one of the embodiments, the signal processing module is configured to take a target motion signal with maximum amplitude information as the target digital motion signal.

[0018] In one of the embodiments, the acquisition end further comprises a wireless communication module.

[0019] The signal processing module is configured to obtain a motion signal generated after the target transceiving antenna detects the target site.

[0020] The wireless communication module is configured to send the motion signal to a receiving device, so that the receiving device triggers a medical imaging device to perform imaging on the target site based on the motion signal.

[0021] In one of the embodiments, the transmitting end further comprises a first conditioning circuit corresponding to each of the transceiving antennas in one-to-one manner.

[0022] The first conditioning circuit is configured to perform conditioning processing on each of the first sub-signals, and send the first sub-signals after the conditioning processing to the transceiving antenna corresponding to the first conditioning circuit.

[0023] In one of the embodiments, the transmitting end further comprises a third power divider corresponding to each of the first conditioning circuits in one-to-one manner.

[0024] The first conditioning circuit is configured to send the first sub-signals after the conditioning processing to the corresponding transceiving antenna through the third power divider.

[0025] The transceiving antenna is configured to radiate electromagnetic waves to the target site based on each of the first sub-signals after the conditioning processing, and send each of the echo signals to the third power divider.

[0026] The third power divider is configured to send each of the echo signals to the mixed demodulator.

[0027] In one of the embodiments, the receiving end further comprises a second conditioning circuit.

[0028] The third power divider is configured to send each of the echo signals to the second conditioning circuit.

[0029] The second conditioning circuit is configured to condition each of the echo signals and send the conditioned echo signals to the mixed demodulator.

[0030] The mixed demodulator is configured to mix and demodulate each of the conditioned echo signals and the corresponding second sub-signal to obtain each of the target motion signals.

[0031] In one of the embodiments, the plurality of transceiving antennas are packaged to form an antenna array.

[0032] In a second aspect, the present application further provides a system for triggering scanning, which comprises a receiving device and the device for triggering scanning provided in the first aspect.

[0033] The device for triggering scanning is configured to determine a target transceiving antenna from the plurality of transceiving antennas of the device, and send a motion signal generated by the target transceiving antenna after detecting the target site to the receiving device.

[0034] The receiving device is configured to receive the motion signal of the target site sent by the device for triggering scanning, and trigger the medical imaging device to image the target site based on the motion signal.

[0035] The device for triggering scanning and the system for triggering scanning, in the embodiment of the present application, the device for triggering scanning comprises a transmitting end, a receiving end and a collecting end. The transmitting end comprises an oscillation source, a transducer, a first power divider and a plurality of transceiving antennas. The transducer is used to split the electromagnetic wave signal generated by the oscillation source to obtain a first signal and a second signal. The first power divider is used to split the first signal to obtain a first sub-signal sent to each transceiving antenna. The transceiving antenna is used to radiate electromagnetic waves to a target site based on the first sub-signal and send a backwave signal reflected by the target site based on the electromagnetic waves to the collecting end. The receiving end is used to obtain a target motion signal corresponding to each transceiving antenna sent to the collecting end according to the second signal and each backwave signal. The collecting end is used to determine a target transceiving antenna from the plurality of transceiving antennas based on each target motion signal. In the embodiment of the present application, a plurality of transceiving antennas can be used to detect backwave signals in a larger area, a plurality of target motion signals are obtained based on a plurality of backwave signals and the second signal, and thus the target transceiving antenna is determined based on the plurality of target motion signals. For a user to be detected with large differences in body shape and features, the most suitable target transceiving antenna can be found in a short time without the need for multiple adjustments of the antenna, so as to obtain a motion trigger signal for triggering the medical imaging device, and the use experience of non-contact scanning is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 It is a first schematic diagram of the device for triggering scanning in one embodiment.

[0038] Figure 2 It is a second schematic diagram of the device for triggering scanning in one embodiment.

[0039] Figure 3 It is a third schematic diagram of the device for triggering scanning in one embodiment.

[0040] Figure 4 It is a first schematic diagram of the system for triggering scanning in one embodiment.

[0041] Figure 5 It is a second schematic diagram of the system for triggering scanning in one embodiment.

[0042] Explanation of reference signs:

[0043] 100, device for triggering scanning; 200, receiving device;

[0044] 1, transmitting end; 2, receiving end; 3, acquisition end;

[0045] 11, oscillation source; 12, transducer; 13, first power divider;

[0046] 14, transceiving antenna; 15, first conditioning circuit;

[0047] 16, third power divider; 17, fourth conditioning circuit;

[0048] 21, second power divider; 22, mixing demodulator; 23, second conditioning circuit;

[0049] 31, digital-to-analog conversion module; 32, signal processing module; 33, wireless communication module;

[0050] 34, third conditioning circuit. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0054] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0056] Figure 1 The first schematic diagram of the device for triggering scanning in one embodiment is shown in Figure 1 As shown in the figure, the device for triggering scanning 100 includes a transmitting end 1, a receiving end 2 and a collection end 3. The transmitting end 1 includes an oscillation source 11, a transducer 12, a first power divider 13 and a plurality of transceiving antennas 14. The transducer 12 is used to split the electromagnetic wave signal generated by the oscillation source 11 to obtain a first signal and a second signal. The first power divider 13 is used to split the first signal to obtain a first sub-signal sent to each transceiving antenna 14. The transceiving antenna 14 is used to radiate electromagnetic waves to a target site based on the first sub-signal, and send a backwave signal reflected by the target site based on the electromagnetic waves to the collection end 3. The receiving end 2 is used to obtain a target motion signal corresponding to each transceiving antenna 14 sent to the collection end 3 according to the second signal and each backwave signal. The collection end 3 is used to determine a target transceiving antenna from the plurality of transceiving antennas 14 based on each target motion signal.

[0057] Among them, the plurality of transceiving antennas 14 are packaged to form an antenna array. The antenna array can be an antenna blanket or an antenna vest. For example, the plurality of transceiving antennas 14 can be arranged in a matrix array, a ring array or an arbitrary array in the interior of the antenna blanket, so as to facilitate the fixation of the positions of the transceiving antennas 14 and the movement during scanning. For example, in the application process, the antenna blanket is placed in front of the human body to obtain the motion signal of the heart.

[0058] In the embodiment of the present application, the oscillation source 11 generates an electromagnetic wave signal of a fixed frequency, which is split into a first signal and a second signal by the splitter 12, and the first signal flows to the transceiving antenna 14. Since there are multiple transceiving antennas 14, the first signal is split by the first power divider 13 to obtain multiple first sub-signals, and the transceiving antenna 14 radiates electromagnetic waves to the target site based on the respective corresponding first sub-signals, while obtaining multiple echo signals of the target site under the radiation of the electromagnetic waves, which include the motion signal of the target site.

[0059] The second signal is used as the local oscillator signal of the receiving end 2, and the target motion signal corresponding to each transceiving antenna 14 is obtained based on the second signal and each echo signal and sent to the collection end 3, and the collection end 3 determines the target transceiving antenna based on each target motion signal.

[0060] Optionally, as shown in Figure 2 The receiving end 2 can include a second power divider 21 and a mixed demodulator 22, the second signal can be split into multiple groups of the same second sub-signals by the second power divider 21 in the receiving end 2, and the mixed demodulator 22 performs mixed demodulation processing on the second sub-signal corresponding to each transceiving antenna 14 and the echo signal to obtain the target motion signal corresponding to each transceiving antenna 14. The number of first sub-signals, the number of second sub-signals, and the number of transceiving antennas 14 are consistent.

[0061] Optionally, in combination with Figure 2 and Figure 3 The collection end 3 can include a signal processing module 32, which can be a microcontroller unit (MCU), or can include a digital-to-analog conversion module 31, a signal processing module 32, etc., and the signal processing module 32 can be a field-programmable gate array (FPGA).

[0062] Optionally, the transceiving antenna 14 can be an antenna integrated with transmitting and receiving functions, or can include a transmitting antenna and a receiving antenna. If the transceiving antenna 14 includes a transmitting antenna and a receiving antenna, the first power divider 13 splits the first signal to obtain multiple first sub-signals, and the transmitting antenna radiates electromagnetic waves to the target site based on the corresponding first sub-signals. The receiving antenna receives the echo signal reflected by the target site under the radiation of the electromagnetic waves; if the transceiving antenna 14 is a transceiving antenna, multiple third power dividers 16 are connected after the first power divider 13, and the multiple first sub-signals obtained by the first power divider 13 are sent to the transceiving antenna 14 through the corresponding third power dividers 16, and the echo signal received by the transceiving antenna 14 is also sent to the receiving end 2 through the corresponding third power dividers 16.

[0063] Optionally, the transducer 12 can be a balun.

[0064] In the embodiment of the present application, the device for triggering scanning includes a transmitting end, a receiving end and a collecting end. The transmitting end includes an oscillation source, a transducer, a first power divider and a plurality of transceiving antennas. The transducer is configured to split the electromagnetic wave signal generated by the oscillation source to obtain a first signal and a second signal. The first power divider is configured to split the first signal to obtain a first sub-signal for sending to each transceiving antenna. The transceiving antenna is configured to radiate electromagnetic waves to a target site based on the first sub-signal and send a backwave signal reflected by the target site based on the electromagnetic waves to the collecting end. The receiving end is configured to obtain a target motion signal corresponding to each transceiving antenna and sent to the collecting end based on the second signal and each backwave signal. The collecting end is configured to determine a target transceiving antenna from the plurality of transceiving antennas based on each target motion signal. In the embodiment of the present application, the use of multiple transceiving antennas can detect backwave signals in a larger area, and multiple target motion signals can be obtained based on multiple backwave signals and the second signal. Thus, the target transceiving antenna can be determined based on the multiple target motion signals. For users with different body types and characteristics, the most suitable target transceiving antenna can be found in a short time without the need for multiple adjustments of the antenna, so as to obtain a motion trigger signal for triggering the medical imaging device and effectively improve the use experience of non-contact scanning.

[0065] Figure 2 As shown in FIG. 2, the receiving end 2 includes a second power divider 21 and a mixed demodulator 22. The transceiving antenna 14 is configured to send each backwave signal to the mixed demodulator 22. The second power divider 21 is configured to split the second signal to obtain a second sub-signal corresponding to each backwave signal. The mixed demodulator 22 is configured to perform mixed demodulation processing on each backwave signal and the second sub-signal corresponding to the backwave signal to obtain each target motion signal sent to the collecting end 3. Figure 2

[0066] In the embodiment of the present application, the second power divider 21 splits the second signal to obtain a second sub-signal corresponding to each backwave signal. The mixed demodulator 22 includes a mixer and an in-phase quadrature (IQ) demodulator. For each backwave signal received by the transceiving antenna 14, the mixer performs mixed processing on the backwave signal and the corresponding second sub-signal, i.e., multiplies the second sub-signal and the backwave signal to extract the radar signal related to the frequency and displacement of the motion in the channel (transceiving antenna). Then, the IQ demodulator demodulates the radar signal related to the frequency and displacement of the motion to obtain two target motion signals. The same is true for the remaining channels, so as to obtain the target motion signals corresponding to the plurality of transceiving antennas.

[0067] ​In this embodiment, the receiving end includes a second power divider and a mixer / demodulator; a transceiver antenna for transmitting each echo signal to the mixer / demodulator; a second power divider for splitting the second signal to obtain a second sub-signal corresponding to each echo signal; and a mixer / demodulator for performing mixing and demodulation processing on each echo signal and the corresponding second sub-signal to obtain each target motion signal transmitted to the acquisition end. This embodiment, by mixing the echo signal and the second sub-signal, can accurately obtain the target motion signal characterizing the motion information of the target part, thus improving the detection accuracy of the target motion signal.

[0068] In one embodiment, such as Figure 3 As shown, the acquisition terminal 3 includes a signal processing module 32, which is used to determine the target digital motion signal from each target motion signal based on the amplitude information of each target motion signal, and to use the transceiver antenna corresponding to the target digital motion signal as the target transceiver antenna.

[0069] In the embodiments of this application, such as Figure 3 As shown, the acquisition terminal 3 also includes a digital-to-analog converter module 31. Each target motion signal is an analog motion signal. The digital-to-analog converter module 31 converts each target motion signal into a digital motion signal. The signal processing module 32 performs filtering and other processing on the digital motion signals. From the filtered digital motion signals, based on the amplitude information of each digital motion signal and preset amplitude information, the target motion signal is determined, and the transceiver antenna corresponding to the target motion signal is used as the target transceiver antenna. For example, if there is one target motion signal, the transceiver antenna corresponding to that target motion signal is used as the target transceiver antenna; if there are multiple target motion signals, the transceiver antenna of any one of the target motion signals is used as the target transceiver antenna.

[0070] Furthermore, the signal processing module 32 is used to treat the target motion signal with the maximum amplitude information as the target digital motion signal.

[0071] In the embodiment of the present application, the signal processing module 32 determines the digital motion signal with the largest amplitude information, takes the digital motion signal with the largest amplitude information as the target digital motion signal, and takes the transceiving antenna 14 corresponding to the target digital motion signal as the target transceiving antenna. For example, the target motion signals corresponding to the transceiving antenna a include a1 and a2, the amplitude information of the target motion signal a1 is 10, and the amplitude information of the target motion signal a2 is 9.8; the target motion signals corresponding to the transceiving antenna b include b1 and b2, the amplitude information of the target motion signal b1 is 12, and the amplitude information of the target motion signal b2 is 12.1; the target motion signals corresponding to the transceiving antenna c include c1 and c2, the amplitude information of the target motion signal c1 is 11, and the amplitude information of the target motion signal c2 is 10.7. The target digital motion signal is the target motion signals b1 and b2 corresponding to the transceiving antenna b. The target transceiving antenna is the transceiving antenna b.

[0072] The acquisition end 3 includes a digital-to-analog conversion module 31 and a signal processing module 32. Optionally, as shown in Figure 3 The digital-to-analog conversion module 31 is external to the signal processing module 32, and the signal processing module 32 performs parallel sampling on each digital motion signal obtained by the digital-to-analog conversion module 31, thereby improving the data processing efficiency of the digital motion signal.

[0073] Optionally, the digital-to-analog conversion module 31 and the signal processing module 32 can be integrated together, as shown in Figure 2

[0074] In the embodiment of the present application, the acquisition end includes a signal processing module; the signal processing module is configured to determine a target digital motion signal from each target motion signal according to the amplitude information of each target motion signal, and take the transceiving antenna corresponding to the target digital motion signal as a target transceiving antenna. In the embodiment of the present application, each target motion signal is processed to determine a target digital motion signal from each target motion signal, so as to obtain a target transceiving antenna with the best motion detection effect, thereby laying a foundation for subsequent motion detection based on the target transceiving antenna.

[0075] In one embodiment, as shown in Figure 2 and Figure 3 The acquisition end 3 further includes a wireless communication module 33; the signal processing module 32 is configured to acquire a motion signal generated after the target transceiving antenna detects the target part; and the wireless communication module 33 is configured to send the motion signal to the receiving device 200, so that the receiving device 200 triggers the medical imaging device to image the target part based on the motion signal.

[0076] ​In the embodiment of the present application, after the target transceiving antenna is determined, in order to reduce the power consumption of the device triggering the scanning, the signal processing module 32 can close the acquisition channel where the other transceiving antennas are located, control the target transceiving antenna to radiate electromagnetic waves, and obtain the motion signal generated after the target transceiving antenna detects the target site. The acquired motion signal is sent to the receiving device 200 through the wireless communication module 33, the receiving device 200 processes the motion signal according to the triggering algorithm, generates a trigger pulse to the medical imaging device, and the medical imaging device can synchronize the scanning of the target site according to the trigger pulse to obtain a clear and reliable digital image.

[0077] In one possible implementation, the multiple transceiving antennas 14 can also continuously radiate electromagnetic waves, and the signal processing module 32 can obtain the motion signals generated after the multiple transceiving antennas 14 detect the target site, and screen the motion signal generated after the target transceiving antenna detects the target site from the multiple motion signals. Alternatively, the multiple transceiving antennas 14 can also continuously radiate electromagnetic waves, and the signal processing module 32 can only receive the motion signal generated after the target transceiving antenna detects the target site.

[0078] Optionally, the wireless communication module 33 can be a Bluetooth module, or a short-distance low-power communication module such as ZigBee, StarFlash, etc.

[0079] Optionally, as shown in the above Figure 3 , the wireless communication module 33 can also be external to the signal processing module 32, and the signal processing module 32 sends the motion signal to the wireless communication module 33 through serial peripheral interface (SPI) communication after obtaining the motion signal. As shown in the above Figure 2 , the wireless communication module 33 can also be integrated with the signal processing module 32.

[0080] Optionally, the medical imaging device can be a magnetic resonance device.

[0081] In the embodiment of the present application, the acquisition end further includes a wireless communication module; a signal processing module, configured to obtain a motion signal generated after a target transceiving antenna detects a target site; and the wireless communication module, configured to send the motion signal to a receiving device, so that the receiving device triggers a medical imaging device to image the target site based on the motion signal. In the embodiment of the present application, after obtaining the motion signal generated after the target transceiving antenna detects the target site, the medical imaging device is remotely controlled by using the wireless communication module, and the receiving device and the device triggering the scanning communicate without physical connection, thereby improving the flexibility of communication.

[0082] In one embodiment, as Figure 2 and Figure 3As shown, the acquisition end 3 further comprises a third conditioning circuit 34; the third conditioning circuit 34 is configured to condition each target motion signal, and send the conditioned target motion signal to the digital-to-analog conversion module 31; the digital-to-analog conversion module 31 is configured to perform digital-to-analog conversion on the conditioned target motion signal, and obtain a digital motion signal corresponding to the target motion signal.

[0083] In the embodiment of the present application, before the target motion signal is input to the digital-to-analog conversion module 31, the target motion signal can also be amplified to a suitable voltage range, so that the digital-to-analog conversion module 31 can identify the target motion signal, and the accuracy of determining the digital motion signal is improved.

[0084] Optionally, the third conditioning circuit 34 can be an amplifier for increasing the amplitude of the target motion signal, which can be a fixed gain or an adjustable gain. For example, an operational amplifier or a power amplifier. The third conditioning circuit 34 can also be a filter for removing unwanted frequency components in the target motion signal and retaining only the frequency range of interest.

[0085] In one embodiment, as shown in Figure 2 and Figure 3 As shown, the transmitting end 1 further comprises a first conditioning circuit 15 corresponding to each transceiving antenna 14; the first power divider 13 is configured to split the first signal to obtain a first sub-signal sent to each first conditioning circuit 15; the first conditioning circuit 15 is configured to condition the first sub-signal, and send the conditioned first sub-signal to the transceiving antenna 14 corresponding to the first conditioning circuit 15.

[0086] In the embodiment of the present application, the first power divider 13 splits the first signal to obtain a plurality of first sub-signals, so that the intensity of the first signal is attenuated, and the first sub-signal is filtered and power-adjusted by the first conditioning circuit 15 to obtain the conditioned first sub-signal.

[0087] Similarly, the first conditioning circuit 15 can also be an amplifier, a filter, etc.

[0088] In one embodiment, as shown in Figure 2 and Figure 3 As shown, the transmitting end 1 further comprises a third power divider 16 corresponding to each first conditioning circuit 15; the first conditioning circuit 15 is configured to send the conditioned first sub-signal to the corresponding transceiving antenna 14 through the third power divider 16; the transceiving antenna 14 is configured to radiate electromagnetic waves to the target site based on the conditioned first sub-signal, and send each echo signal to the third power divider 16; the third power divider 16 is configured to send each echo signal to the frequency mixing demodulator 22.

[0089] In the embodiment of the present application, the first sub-signals are transmitted to the corresponding transceiving antennas 14 through the third power divider 16, and the transceiving antennas 14 radiate electromagnetic waves to the target sites based on the first sub-signals, while the third power divider 16 transmits the echo signals received by the transceiving antennas 14 to the frequency mixing demodulator 22. The third power divider 16 can provide good isolation, i.e. the signals between the transceiving antennas do not affect each other, avoiding signal interference and crosstalk.

[0090] In the embodiment of the present application, the transmitting end further comprises a third power divider corresponding to each first conditioning circuit; the first conditioning circuit is configured to transmit the first sub-signals after conditioning to the corresponding transceiving antennas through the third power divider; the transceiving antenna is configured to radiate electromagnetic waves to the target sites based on the first sub-signals after conditioning, and transmit the echo signals to the third power divider; and the third power divider is configured to transmit the echo signals to the frequency mixing demodulator. The third power divider is provided in the present application, so that the transmitting antenna and the receiving antenna have the function of transceiving integration, i.e. the receiving and the transmitting share the same path, which helps to reduce the size of the device for triggering scanning, and is more conducive to engineering.

[0091] In one embodiment, as shown in Figure 2 and Figure 3 , the receiving end 2 further comprises a second conditioning circuit 23; the third power divider 16 is configured to transmit the echo signals to the second conditioning circuit 23; the second conditioning circuit 23 is configured to perform conditioning processing on the echo signals, and transmit the echo signals after conditioning to the frequency mixing demodulator 22; and the frequency mixing demodulator 22 is configured to perform frequency mixing demodulation processing on the echo signals after conditioning and the corresponding second sub-signals, to obtain the target motion signals.

[0092] In the embodiment of the present application, the echo signals are transmitted to the second conditioning circuit 23, and the second conditioning circuit 23 performs conditioning processing on the echo signals, avoiding the echo signals being too weak for the frequency mixing demodulator 22 to identify the echo signals. The frequency mixing demodulator 22 multiplies the echo signals after conditioning with the corresponding second sub-signals, and the multiplied signals are filtered through a low-pass filter to obtain low-frequency components, i.e. baseband components. The baseband components are analyzed and processed to obtain the target motion signals. The low-frequency information representing motion hidden in the echo signals is extracted by the frequency mixing demodulator 22 to become baseband signals that can be directly measured and analyzed, which is convenient for data analysis and processing.

[0093] In one embodiment, as shown in Figure 2 and Figure 3As shown, the transmitting end 1 further comprises a fourth conditioning circuit 17; the fourth conditioning circuit 17 is configured to condition the electromagnetic wave signal generated by the oscillation source 11, and send the conditioned electromagnetic wave signal to the transducer 12; the transducer 12 is configured to split the conditioned electromagnetic wave signal to obtain the first signal and the second signal.

[0094] In the embodiment of the present application, the fourth conditioning circuit 17 amplifies the electromagnetic wave signal generated by the oscillation source 11 before sending it to the transducer 12, thereby improving the accuracy of the first signal and the second signal obtained by splitting the transducer 12.

[0095] In one embodiment, a system for triggering scanning is provided, as shown in Figure 4 and Figure 5 The system comprises a receiving device 200 and a device 100 for triggering scanning provided by any of the above embodiments; the device 100 for triggering scanning is configured to determine a target transceiver from a plurality of transceivers 14 of the device, and send a motion signal generated by detecting a target part by the target transceiver to the receiving device 200; the receiving device 200 is configured to receive the motion signal of the target part sent by the device 100 for triggering scanning, and trigger the medical imaging device to image the target part based on the motion signal.

[0096] In the embodiment of the present application, the radar front end is the part of the above Figure 2 and Figure 3 except the transceiver 14, and the specific implementation of the device 100 for triggering scanning to determine the target transceiver can be as shown in the above embodiments. After determining the target transceiver, the target transceiver is used to detect the target part to generate a motion signal, and the signal processing module in the device 100 for triggering scanning acquires the motion signal, sends the motion signal to the receiving device 200 through the wireless communication module in the device 100 for triggering scanning, and the receiving device 200 generates a trigger pulse of the medical imaging device based on the motion signal. The medical imaging device can synchronize the scanning of the target part according to the trigger pulse to obtain a clear and reliable digital image, and the use experience of non-contact scanning is effectively improved through the system.

[0097] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0098] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. An apparatus for triggering a scan, the apparatus comprising: The device comprises a transmitting end, a receiving end and a collecting end, the transmitting end comprises an oscillation source, a transducer, a first power divider and a plurality of transceiving antennas; The transducer is configured to split the electromagnetic wave signal generated by the oscillation source to obtain a first signal and a second signal; The first power divider is configured to split the first signal to obtain a first sub-signal sent to each of the transceiving antennas; The transceiving antenna is configured to radiate electromagnetic waves to a target site based on the first sub-signal and send a backwave signal reflected by the target site based on the electromagnetic waves to the collecting end; The receiving end is configured to obtain a target motion signal corresponding to each of the transceiving antennas sent to the collecting end according to the second signal and each of the backwave signals; The collecting end is configured to determine a target transceiving antenna from the plurality of transceiving antennas based on each of the target motion signals.

2. The apparatus of claim 1, wherein, The receiving end comprises a second power divider and a frequency mixing demodulator; The transceiving antenna is configured to send each of the backwave signals to the frequency mixing demodulator; The second power divider is configured to split the second signal to obtain a second sub-signal corresponding to each of the backwave signals; The frequency mixing demodulator is configured to perform frequency mixing demodulation processing on each of the backwave signals and the second sub-signal corresponding to the backwave signal to obtain each of the target motion signals sent to the collecting end.

3. The apparatus of claim 2, wherein, The collecting end comprises a signal processing module; The signal processing module is configured to determine a target digital motion signal from each of the target motion signals according to amplitude information of each of the target motion signals, and determine the transceiving antenna corresponding to the target digital motion signal as the target transceiving antenna.

4. The apparatus of claim 3, wherein, The signal processing module is configured to determine the target motion signal with the maximum amplitude information as the target digital motion signal.

5. The apparatus of claim 3, wherein, The collecting end further comprises a wireless communication module; The signal processing module is configured to obtain a motion signal generated after the target transceiving antenna detects the target site; The wireless communication module is configured to send the motion signal to a receiving device, so that the receiving device triggers a medical imaging device to perform imaging on the target site based on the motion signal.

6. The apparatus of claim 2, wherein, The transmitting end further comprises a first conditioning circuit corresponding to each of the transceiving antennas; The first conditioning circuit is configured to perform conditioning processing on each of the first sub-signals, and send the first sub-signal after conditioning processing to the transceiving antenna corresponding to the first conditioning circuit.

7. The apparatus of claim 6, wherein, The transmitting end further comprises a third power divider corresponding to each of the first conditioning circuits; The first conditioning circuit is configured to send the first sub-signal after conditioning processing to the corresponding transceiving antenna through the third power divider; The transceiving antenna is configured to radiate electromagnetic waves to the target site based on each of the first sub-signals after conditioning processing, and send each of the backwave signals to the third power divider; The third power divider is configured to send each of the backwave signals to the frequency mixing demodulator.

8. The apparatus of claim 7, wherein, The receiving end further comprises a second conditioning circuit; The third power divider is configured to send each of the backwave signals to the second conditioning circuit; The second conditioning circuit is configured to condition each of the echo signals and send the conditioned echo signals to the mixed demodulator. The mixed demodulator is configured to perform mixed demodulation on each of the conditioned echo signals and the corresponding second sub-signal to obtain each of the target motion signals.

9. The apparatus of any one of claims 1-8, wherein, The plurality of transceiving antennas are packaged to form an antenna array.

10. A system for triggering a scan, characterized by The system comprises a receiving device and a trigger scanning device according to any one of claims 1-9; The trigger scanning device is configured to determine a target transceiving antenna from the plurality of transceiving antennas of the device, and send a motion signal generated by the target transceiving antenna after detecting the target site to the receiving device; The receiving device is configured to receive the motion signal of the target site sent by the trigger scanning device, and trigger the medical imaging device to image the target site based on the motion signal.

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