Photoacoustic dual-mode imaging probe

Abstract

The invention discloses a photoacoustic dual-mode imaging probe which comprises an optical fiber, a transducer and a shell. The optical fiber and the transducer are at least partially wrapped in the shell, and a light outlet of the optical fiber and the front end of the transducer are both located at the sound head end of the photoacoustic dual-mode imaging probe; the fiber is used for emitting laser pulses; the transducer is used for transmitting and receiving ultrasonic signals. The optical fiber and the transducer are wrapped in the photoacoustic dual-mode imaging probe through the shell, so that the photoacoustic dual-mode imaging probe, the optical fiber and the transducer are integrated, cleaning, disinfection and holding are facilitated, the man-machine interaction performance is high, and a coupling pad is omitted.

Description

Technical Field

[0001] The invention relates to a photoacoustic dual-mode imaging probe. Background Art

[0002] Photoacoustic dual-modality imaging is a dual-mode imaging method that combines photoacoustic imaging and ultrasound imaging. Photoacoustic imaging reflects the functional information of the organism, while traditional ultrasound imaging reflects the structural information of the organism. The effective combination of the two, that is, photoacoustic dual-modality imaging, overcomes the shortcomings of single-modality imaging and can provide more comprehensive tissue structure and functional information.

[0003] The photoacoustic dual-modality imaging system includes an ultrasound device, a laser, and a fiber bundle coupled to an ultrasound probe. The photoacoustic system and the ultrasound system are relatively independent and can be disassembled. They are difficult to clean and disinfect during use, and the grip and human-computer interaction performance are poor. In addition, during the use of the photoacoustic dual-modality imaging system, a coupling pad must be used to concentrate the laser energy under the acoustic head while diffusing the laser spot. The coupling pad needs to be cleaned, disinfected, and replaced, which increases the cost of use and maintenance. Summary of the invention

[0004] The present invention provides a photoacoustic dual-mode imaging probe to solve the problems that when using a photoacoustic dual-mode imaging system, the photoacoustic system and the ultrasonic system of the probe are relatively independent, cleaning and disinfection are difficult during use, the gripping feeling and human-computer interaction performance are poor, and the use of a coupling pad brings many inconveniences.

[0005] The present invention provides a photoacoustic dual-mode imaging probe, comprising an optical fiber, a transducer, a sound-transmitting element and a shell; the optical fiber and the transducer are at least partially wrapped inside the shell, and the light outlet of the optical fiber and the transducer are both located at the sound head end of the photoacoustic dual-mode imaging probe; the optical fiber is used to transmit laser pulses; the transducer is used to transmit and receive ultrasonic signals; the sound-transmitting element is at least partially wrapped outside the transducer and extends to the front surface of the transducer, and at least a part of the optical fiber is fixedly connected to the transducer through the sound-transmitting element.

[0006] The photoacoustic dual-mode imaging probe provided by the present invention wraps both the optical fiber and the transducer inside the shell, so that the three become a whole, which is easy to clean and disinfect, convenient to hold, has strong human-computer interaction performance and eliminates the use of coupling pads. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A cross-sectional view of an embodiment of a photoacoustic dual-mode imaging probe;

[0008] Figure 2 A partially enlarged cross-sectional view of an embodiment of a photoacoustic dual-mode imaging probe;

[0009] Figure 3 A cross-sectional view of an embodiment of a photoacoustic dual-mode imaging probe. DETAILED DESCRIPTION

[0010] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, since known functions and structures will be described in unnecessary details, they will not be described in detail.

[0011] like Figure 1 to Figure 2 As shown, the photoacoustic dual-mode imaging probe described in the embodiment includes an optical fiber 3, a transducer 2 and a housing 1; the optical fiber 3 is used to emit laser pulses; the transducer is used to emit and receive ultrasonic signals; the optical fiber 3 and the transducer 2 are at least partially wrapped inside the housing 1. For the convenience of description, the end of the transducer 2 that emits and receives ultrasonic signals outward is designated as the front end, the end of the photoacoustic dual-mode imaging probe used for scanning is designated as the acoustic head end, and the direction toward the acoustic head end is the front of the photoacoustic dual-mode imaging probe. The light outlet of the optical fiber 3 and the transducer 2 are both located at the acoustic head end of the photoacoustic dual-mode imaging probe to realize the functions of emitting laser pulses and emitting and receiving ultrasonic signals at the acoustic head end of the photoacoustic dual-mode imaging probe. The optical fiber 3 and the transducer 2 are at least partially wrapped inside the shell 1, including: the optical fiber 3 and the transducer 2 are completely wrapped inside the shell 1; the light outlet of the optical fiber 3 and the front end of the transducer 2 are exposed outside the shell 1, and the rest are wrapped inside the shell 1, that is, the acoustic head end of the photoacoustic dual-mode imaging probe is not wrapped by the shell 1; or other situations where the optical fiber 3 and the transducer 2 are at least partially wrapped inside the shell 1. When the photoacoustic dual-mode imaging probe responds to the working signal, on the one hand, the optical fiber 3 generates a laser pulse to irradiate the human tissue, and the material with strong optical absorption characteristics in the tissue absorbs the light energy, causing local heating and thermal expansion, thereby generating an ultrasonic signal that propagates outward and is received by the transducer 2. The transducer 2 converts the received ultrasonic signal into an electrical signal and transmits it to the ultrasound host. The ultrasound host generates a photoacoustic image for medical staff to diagnose by processing the ultrasonic signal; on the other hand, when the transducer 2 receives the working signal, it transmits an ultrasonic signal to the human tissue and receives the corresponding ultrasonic echo signal. The transducer 2 converts the received ultrasonic signal into an electrical signal and transmits it to the ultrasound host. The ultrasound host generates an ultrasonic image for medical staff to diagnose by processing the ultrasonic signal. The photoacoustic dual-mode imaging probe wraps the optical fiber 3 and the transducer 2 in one piece through the housing 1. The photoacoustic dual-mode imaging probe can meet the requirements of the probe for photoacoustic imaging and ultrasonic imaging dual-mode imaging, improves the grip of the probe, and is also conducive to cleaning and disinfection during use.

[0012] like Figure 1As shown, in one embodiment, the optical fiber 3 and the transducer 2 are completely wrapped in the housing 1, at least the housing at the light outlet of the optical fiber 3 is made of light-guiding material, and at least the housing at the front end of the transducer 2 is made of sound-transmitting material, including only the housing at the light outlet of the optical fiber 3 is made of light-guiding material, only the housing at the front end of the transducer 2 is made of sound-transmitting material, and the other parts of the housing 1 are made of other materials; or the light outlet of the optical fiber 3 and the housing at the front end of the transducer 2 are made of light-guiding sound-transmitting material, and the other parts of the housing 1 are made of other materials; or the housing 1 is made of light-guiding sound-transmitting material as a whole, and other conditions that meet the conditions. When the photoacoustic dual-mode imaging probe is used, the laser pulse emitted by the optical fiber 3 is transmitted through the light-guiding part of the housing 1 at the light outlet of the optical fiber 3 and then concentratedly irradiated on the human tissue in front of the probe acoustic head, reducing the energy loss caused by the light signal being blocked by the transducer; at the same time, due to the effect of the light-guiding part of the housing 1 at the light outlet of the optical fiber 3, the laser spot emitted by the optical fiber 3 is diffused, reducing the energy irradiated on the local human tissue, and avoiding laser burns to the skin. In this embodiment, the laser pulse emitted by the optical fiber 3 plays a role in concentrating the laser pulse in front of the acoustic head and diffusing the laser spot through the light-guiding part of the shell 1 at the light outlet of the optical fiber 3, replacing the role of the coupling pad, and avoiding the inconvenience caused by the probe having to be used with the coupling pad in the traditional dual-mode imaging process. After the laser pulse emitted by the optical fiber 3 enters the human tissue, the material with strong optical absorption characteristics in the tissue absorbs the light energy and causes local heating and thermal expansion, thereby generating an ultrasonic signal that propagates outward and is received by the transducer 2 through the sound-transmitting part of the shell 1 at the front end of the transducer 2. The ultrasonic signal is converted and processed to generate a photoacoustic image. When the photoacoustic dual-mode imaging probe is used, the ultrasonic signal emitted by the transducer 2 enters the human tissue through the sound-transmitting part of the shell 1 at the front end of the transducer 2, and the echo signal formed is received by the transducer 2 through the sound-transmitting part of the shell 1 at the front end of the transducer 2. The echo signal is converted and processed to generate an ultrasonic image.

[0013] like Figure 2As shown, in one embodiment, the optical fiber 3 is completely wrapped in the housing 1, the front end of the transducer 2 is exposed outside the housing 1, and the rest is wrapped inside the housing 1, and at least the housing 1 at the light outlet of the optical fiber 3 is made of light-guiding material. This embodiment includes the case where the housing 1 is made of light-guiding material as a whole, only the housing 1 at the light outlet of the optical fiber 3 is made of light-guiding material, and the rest of the housing 1 is made of other materials, or other conditions are met. When the photoacoustic dual-mode imaging probe is used, the laser pulse emitted by the optical fiber 3 is transmitted through the light-guiding part of the housing 1 at the light outlet of the optical fiber 3 and then concentratedly irradiates the human tissue in front of the probe sound head. At the same time, due to the effect of the light-guiding part of the housing 1 at the light outlet of the optical fiber 3, the laser spot emitted by the optical fiber is diffused, the energy irradiated on the local human tissue is reduced, and the laser burns the skin are avoided. In this embodiment, the laser pulse emitted by the optical fiber 3 passes through the light-guiding part of the housing 1 at the light outlet of the optical fiber 3, which plays a role in concentrating the optical signal below the sound head and diffusing the laser spot, replacing the role of the coupling pad, and avoiding the inconvenience caused by the probe having to use the coupling pad in the traditional dual-mode imaging process. After the laser pulse emitted by the optical fiber 3 enters the human tissue, the material with strong optical absorption characteristics in the tissue absorbs the light energy, causing local heating and thermal expansion, thereby generating an ultrasonic signal that propagates outward and is received by the transducer 2. The ultrasonic signal is converted and processed to generate a photoacoustic image. When the photoacoustic dual-mode imaging probe is used, the ultrasonic signal emitted by the transducer 2 enters the human tissue, and the echo ultrasonic signal is received by the transducer 2. The echo ultrasonic signal is converted and processed to generate an ultrasonic image.

[0014] Not shown in the figure, in one embodiment, a sound head cover is also included, and the light outlet of the optical fiber 3 and the front end of the transducer 2 are exposed outside the housing 1, that is, the sound head end of the photoacoustic dual-mode imaging probe is not wrapped by the housing 1, and the sound head cover is located at the light outlet of the optical fiber 3 and the front end of the transducer 2, wrapped outside the sound head end of the photoacoustic dual-mode imaging probe and connected to the housing 1, and the sound head cover is made of light-conducting and sound-transmissive material. When the photoacoustic dual-mode imaging probe is used, the laser pulse emitted by the optical fiber 3 is transmitted through the probe cover and concentrated on the human tissue in front of the probe sound head, reducing the energy loss caused by the light signal being blocked by the transducer; at the same time, due to the effect of the sound head cover, the laser spot emitted by the optical fiber 3 is diffused, reducing the energy irradiated on the local human tissue, and avoiding laser burns to the skin. In this embodiment, the laser pulse emitted by the optical fiber 3 plays a role in concentrating the laser pulse in front of the sound head and diffusing the laser spot through the sound head cover, replacing the role of the coupling pad, avoiding the inconvenience caused by the probe having to be used with the coupling pad in the traditional dual-mode imaging process. After the laser pulse emitted by the optical fiber 3 enters the human tissue, the material with strong optical absorption characteristics in the tissue absorbs the light energy, causing local heating and thermal expansion, thereby generating an ultrasonic signal that propagates outward and is received by the transducer 2 through the acoustic head cover. The ultrasonic signal is converted and processed to generate a photoacoustic image. When the photoacoustic dual-mode imaging probe is used, the ultrasonic signal emitted by the transducer 2 enters the human tissue through the acoustic head cover, and the echo signal formed is received by the transducer 2 through the acoustic head cover. The echo signal is converted and processed to generate an ultrasonic image.

[0015] like Figure 3 As shown, in an embodiment where the optical fiber 3 and the transducer 2 are completely wrapped in the housing 1, there is a filling layer 4 between the light outlet of the optical fiber 3 and the front end of the transducer 2 and the housing 1. The filling layer 4 is a light-conducting and sound-transmitting material, such as a liquid coupling agent, a gel material, or a mixture of the two, and other materials with good acoustic and optical transmission properties. When the photoacoustic dual-mode imaging probe is used, on the one hand, the laser pulse emitted by the optical fiber 3 is transmitted through the filling layer 4 and the housing 1, which can better concentrate the light field energy to the front of the sound head; on the other hand, the laser pulse emitted by the optical fiber 3 is transmitted through the filling layer 4 and the housing 1, which makes the laser spot diffuse and reduce the local energy better; at the same time, it will not affect the sending and receiving of ultrasonic signals.

[0016] In another embodiment, the light outlet of the optical fiber 3 and the front end of the transducer 2 are exposed outside the housing 1 and wrapped in the acoustic head cover, and there is a filling layer between the light outlet of the optical fiber and the front end of the transducer and the acoustic head cover; the filling layer is a light-conducting and sound-transmitting material, such as a liquid coupling agent, a gel material, or a mixture of the two, and other materials with good acoustic and optical transmission properties. When the photoacoustic dual-mode imaging probe is used, on the one hand, the laser pulse emitted by the optical fiber 3 is transmitted through the filling layer 4 and the acoustic head cover, which can better concentrate the light field energy to the front of the acoustic head; on the other hand, the laser pulse emitted by the optical fiber 3 is transmitted through the filling layer 4 and the acoustic head cover, which makes the laser spot diffuse and reduce the local energy better; at the same time, it will not affect the sending and receiving of ultrasonic signals.

[0017] Not shown in the figure, in the embodiment where the outer shell 1 is wrapped in front of the light outlet of the optical fiber 3, there is a filling layer between the light outlet of the optical fiber 3 and the outer shell 1, and the filling layer is a light-guiding material. When the photoacoustic dual-mode imaging probe is used, the laser pulse emitted by the optical fiber 3 is transmitted through the filling layer 4 and the outer shell 1, which can better concentrate the light field energy to the front of the acoustic head. At the same time, the laser pulse emitted by the optical fiber 3 is transmitted through the filling layer 4 and the outer shell 1, so that the laser spot is diffused to reduce the local energy better, and it will not affect the sending and receiving of ultrasonic signals.

[0018] Not shown in the figure, in the embodiment where the light outlet of the optical fiber 3 and the front end of the transducer 2 are wrapped with a sound head cover, there is a filling layer between the light outlet of the optical fiber 3 and the sound head cover, and the filling layer is a light-guiding material. When the photoacoustic dual-mode imaging probe is used, the laser pulse emitted by the optical fiber 3 passes through the filling layer 4 and the sound head cover, which can better concentrate the light field energy to the front of the sound head. At the same time, the laser pulse emitted by the optical fiber 3 passes through the filling layer 4 and the sound head cover, which makes the laser spot diffuse and reduce the local energy better, and will not affect the sending and receiving of ultrasonic signals.

[0019] like Figures 1 to 3 As shown, in this embodiment, the light outlet of the optical fiber 3 is spaced a predetermined distance from the front end of the transducer 2 to reduce the laser pulse emitted from the light outlet of the optical fiber 3 being blocked by the transducer and affecting the quality of the photoacoustic imaging. At the same time, by spacing the light outlet of the optical fiber 3 and the front end of the transducer 2 at a predetermined distance, the interference of the laser pulse emitted by the optical fiber 3 on the transducer can be reduced. The predetermined distance is determined comprehensively by the type and size of the probe and the measurement requirements.

[0020] like Figures 1 to 3As shown, in this embodiment, the front section of the optical fiber 3 is parallel to the axis of the transducer 2 or the front section of the optical fiber 3 is configured at an acute angle to the axis of the transducer 2. The axis of the transducer 2 refers to a straight line perpendicular to the front surface of the transducer 2, that is, a straight line perpendicular to the surface of the transducer 2 that transmits and receives ultrasonic signals, and the front section of the optical fiber 3 is a part of the optical fiber 3 located at the front of the photoacoustic dual-mode imaging probe. The front section of the optical fiber 3 is parallel to the axis of the transducer 2 or the front section of the optical fiber 3 is configured at an acute angle to the axis of the transducer 2, that is, the angle between the front section of the optical fiber 3 and the transducer 2 is greater than or equal to 0 degrees and less than 90 degrees, and the angle is configured according to the clinical detection depth requirements. In the embodiment where the front section of the optical fiber 3 is at an acute angle to the transducer 2, the light outlet of the optical fiber 3 configured obliquely solves the problem of the light beam being blocked by the transducer 2, and at the same time effectively concentrates the laser pulse emitted by the optical fiber 3 below the probe head.

[0021] The optical fiber 3 may be one or more optical fibers, and the multiple optical fibers may be arranged side by side to form an optical fiber bundle. In one embodiment, multiple optical fibers 3 are included.

[0022] In one embodiment, the multiple optical fibers 3 are located on both sides of the transducer 2, on one side of the transducer 2, or around the transducer 2. The surrounding of the transducer 2 may be evenly distributed around the transducer 2, or divided into three or four bundles surrounding the transducer 2, or other positions that are conducive to the optical fiber 3 emitting laser pulses and the transducer 2 emitting and receiving ultrasonic signals. The multiple optical fibers 3 may be arranged mutually to form optical fiber bundles arranged at the above positions, or may be arranged separately at the above positions.

[0023] like Figure 3 As shown, in this embodiment, a fixing device 5 is further included, and the optical fiber 3 is wrapped in the fixing device 5, and the fixing device 5 is at least partially accommodated in the housing. The fixing device 5 is used to fix the optical fiber 3 and protect the optical fiber 3.

[0024] In one embodiment, the optical fiber 3 and the transducer 2 are fixedly connected as one body, and the relative positions of the optical fiber 3 and the transducer 2 can be fixed by adhesive bonding, mechanical fixing or other fixed connection methods.

[0025] like Figure 3 As shown, this embodiment also includes a sound-transmitting element 6, which is at least partially wrapped around the outside of the transducer 2 and extends to the front surface of the transducer 2. At least a portion of the optical fiber 3 is fixedly connected to the transducer 2 through the sound-transmitting element 6, and the light outlet of the optical fiber 3 is exposed outside the sound-transmitting element 6. The ultrasonic signal emitted by the transducer 2 is focused through the sound-transmitting element 6 located on the front surface thereof, which reduces the loss of the ultrasonic signal and improves the quality of imaging; the other part of the sound-transmitting element 6 is fully or partially wrapped around the outside of the transducer 2, and the sound-transmitting element 6 connects the transducer 2 and the optical fiber 3, so that the transducer 2 and the optical fiber 3 are fixedly connected as a whole through the sound-transmitting element 6.

[0026] In one embodiment, the sound-transmitting element 6 is made of a sound-transmitting and light-reflecting material, for example, a non-absorbing and highly scattering material is added to a traditional lens material, or the sound-transmitting element 6 is made of a sound-transmitting and light-absorbing material. The sound-transmitting element 6 made of a sound-transmitting and light-reflecting material or a sound-transmitting and light-absorbing material completely or partially wraps the transducer so that the laser pulse emitted by the optical fiber 3 does not enter the transducer 2 and cause interference, and the sound-transmitting element located on the front surface of the transducer can focus the ultrasonic signal emitted by the transducer 2.

[0027] like Figure 3 As shown, this embodiment also includes a signal cable 7, which includes a transducer signal line (not shown), an optical fiber extension section (not shown) and a sheath 8; the transducer signal line is connected to the transducer 2, and the transducer receives and transmits signals through the transducer signal line; the optical fiber extension section is the portion of the optical fiber 3 extending to the signal cable, and the laser pulse is transmitted to the optical fiber 3 through the optical fiber extension section and emitted outward from the light outlet of the optical fiber 3; the transducer signal line and the optical fiber extension section are wrapped in the sheath 8, and the optical fiber extension section and the transducer signal line are wrapped as a whole, so that the overall structure is simple and the photoacoustic dual-mode imaging probe is easy to use.

[0028] In one embodiment, the signal cable 7 also includes a protective device (not shown), which is wrapped around the outside of the optical fiber extension section, and the outer skin 8 is wrapped around the outside of the protective device. The protective device protects the optical fiber from breaking easily when the signal cable is bent to a certain degree inside the signal cable.

[0029] In one embodiment, the signal cable 7 further includes a shielding net (not shown), which is wrapped around the transducer signal line and the outside of the optical fiber extension section, and the outer skin 8 is wrapped around the outside of the shielding net. The provision of the shielding net prevents the electrical signal and the optical signal from being interfered by the external environment when being transmitted in the transducer signal line and the optical fiber extension section, thereby improving the transmission efficiency.

[0030] In another embodiment, the transducer signal lines are evenly distributed around the optical fiber extension section, and the outer sheath 8 is wrapped around the outside of the transducer signal lines and the optical fiber extension section to form a signal cable 7 as a whole.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A photoacoustic dual-mode imaging probe, characterized in that: It includes an optical fiber, a transducer, a sound-transmitting element and a housing; The optical fiber and the transducer are at least partially wrapped inside the housing, and the light outlet of the optical fiber and the transducer are both located at the acoustic head end of the photoacoustic dual-mode imaging probe; The optical fiber is used to transmit laser pulses; The transducer is used to transmit and receive ultrasonic signals; The sound-transmitting element is at least partially wrapped around the outside of the transducer and extends to the front surface of the transducer. At least a portion of the optical fiber is fixedly connected to the transducer through the sound-transmitting element.

2. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: The optical fiber and the transducer are completely enclosed in the housing; At least the outer shell at the light outlet of the optical fiber is made of light-guiding material; At least the housing at the front end of the transducer is made of sound-transmitting material.

3. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: The optical fiber is completely enclosed in the housing; The front end of the transducer is exposed outside the housing, and the rest of the transducer is wrapped inside the housing; At least the outer shell at the light outlet of the optical fiber is made of light-guiding material.

4. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: Also included is a sound head cover; The light outlet of the optical fiber and the front end of the transducer are exposed outside the housing; The acoustic head cover wraps the light outlet of the optical fiber and the outside of the front end of the transducer, and is connected to the housing; The acoustic head cover is made of light-conducting and sound-transmitting material.

5. The photoacoustic dual-mode imaging probe according to claim 2, characterized in that: A filling layer is provided between the light outlet of the optical fiber and the front end of the transducer and the housing; The filling layer is a light-conducting and sound-transmitting material.

6. The photoacoustic dual-mode imaging probe according to claim 4, characterized in that: A filling layer is provided between the light outlet of the optical fiber and the front end of the transducer and the acoustic head cover; The filling layer is a light-conducting and sound-transmitting material.

7. The photoacoustic dual-mode imaging probe according to any one of claims 2 to 3, characterized in that: A filling layer is provided between the light outlet of the optical fiber and the outer shell; The filling layer is a light-guiding material.

8. The photoacoustic dual-mode imaging probe according to any one of claim 4, characterized in that: A filling layer is provided between the light outlet of the optical fiber and the acoustic head cover; The filling layer is a light-guiding material.

9. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: The light outlet of the optical fiber is spaced a predetermined distance from the front end of the transducer.

10. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: The front section of the optical fiber is parallel to the axis where the transducer is located, or the front section of the optical fiber forms an acute angle with the axis where the transducer is located.

11. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: Includes multiple optical fibers.

12. The photoacoustic dual-mode imaging probe according to claim 11, characterized in that: The multiple optical fibers are located on both sides of the transducer, on one side of the transducer, or surround the transducer.

13. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: Also included is a fixing device, in which the optical fiber is wrapped; The fixing device is at least partially received in the housing.

14. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: The optical fiber is fixedly connected to the transducer.

15. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: The sound-transmitting element is made of a sound-transmitting and light-reflecting material or a sound-transmitting and light-absorbing material.

16. The photoacoustic dual-mode imaging probe according to claim 1, characterized in that: Also includes signal cables; The signal cable comprises a transducer signal line, an optical fiber extension section and an outer sheath; The transducer signal line is connected to the transducer; The optical fiber extension section is the portion of the optical fiber extending from the acoustic head end to the signal cable; The transducer signal line and the optical fiber extension section are wrapped in the outer sheath.

17. The photoacoustic dual-mode imaging probe according to claim 16, characterized in that: The signal cable also includes a protection device; The protective device is wrapped around the outside of the optical fiber extension section; The outer skin is wrapped around the outside of the protection device.

18. The photoacoustic dual-mode imaging probe according to claim 16, characterized in that: The signal cable also includes a shielding net; The shielding net is wrapped around the transducer signal line and the outside of the optical fiber extension section; The outer skin is wrapped around the outside of the shielding net.

19. The photoacoustic dual-mode imaging probe according to any one of claims 16 to 18, characterized in that: The transducer signal lines are evenly distributed around the optical fiber extension section.

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