CN115607112B - Integrated intelligent imaging system and method based on optomagnetic sound - Google Patents
Integrated intelligent imaging system and method based on optomagnetic sound Download PDFInfo
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Abstract
The invention relates to the field of biomedical imaging, in particular to an integrated intelligent imaging system and method based on optomagnetic sound, wherein a magnetic field construction module, an ultrasonic signal excitation probe, a detection probe, an imaging module, a photographic device and a data processing module are arranged, the ultrasonic signal excitation is carried out on a detected body through the ultrasonic signal excitation probe, the detection probe is used for detecting the detected body and constructing a magnetoacoustic image, moreover, whether the magnetoacoustic image is qualified or not is determined through the constructed magnetoacoustic image, whether the detection point corresponding to the magnetoacoustic image is excited and detected again is determined, and the ultrasonic signal emission frequency and the emission duration time of the ultrasonic excitation probe are adjusted according to the interference characterization parameter and the artifact area corresponding to the constructed magnetoacoustic image when excitation and detection are carried out again, so that the magnetic acoustic image construction is prevented from being incomplete, the signal to noise ratio of the image is improved, and the imaging quality is improved.
Description
Technical Field
The invention relates to the field of biomedical imaging, in particular to an integrated intelligent imaging system and method based on optomagnetic sound.
Background
The magnetoacoustic imaging technology is a coupling imaging technology using an electromagnetic field and an ultrasonic field, and the basic principle is that ultrasonic excitation is applied to a target to be imaged placed in a static magnetic field, so that a plurality of local electric fields are generated in the target to be imaged, the target to be imaged is detected through a detection coil, and a magnetoacoustic image is constructed according to a detected signal.
Chinese patent publication no: CN108309298A discloses a magneto-acoustic-electric imaging device based on laser ultrasound, which includes a laser ultrasound excitation module, a detection and reconstruction module, and a control and synchronization module, where the control and synchronization module is connected to the laser ultrasound excitation module and the detection and reconstruction module respectively; the laser ultrasonic excitation module generates an ultrasonic signal; the detection and reconstruction module acquires an electrical parameter image of the target imaging body; the control and synchronization module controls the magnetic-acoustic-electric imaging device to work cooperatively and consistently, pulse laser emitted by a pulse laser enters a laser beam adjusting system for adjustment after being attenuated or filtered by an optical filter, then enters a laser ultrasonic excitation system and is converted into ultrasonic beams through optoacoustic conversion, the ultrasonic beams are combined with a static magnetic field to generate a local electric field source in a target imaging body, induced electric signals are detected through a non-contact detection coil, and a reconstructed image of the target imaging body is obtained through processing and image reconstruction of a weak signal processing subsystem.
It can be seen that the following problems still exist in the prior art,
1. in the prior art, the influence of different characteristics of different parts of an object to be detected on final imaging under the same ultrasonic excitation time and the same ultrasonic excitation frequency is not considered;
2. in the prior art, each control parameter is not automatically adjusted when the magnetoacoustic imaging is performed according to the image data of the constructed ultrasonic image.
Disclosure of Invention
In order to solve the above problems, the present invention provides an integrated intelligent imaging system based on optomagnetic sound, which comprises:
a magnetic field construction module to form a magnetic field in the region to be detected;
the ultrasonic signal excitation probe comprises a laser generating unit and an optical energy conversion unit which are both arranged on a slide rail above a region to be detected, wherein the laser generating unit is used for emitting laser to the optical energy conversion unit, and the optical energy conversion unit is used for converting optical energy into an ultrasonic signal and then emitting the ultrasonic signal;
the detection probe is arranged on the slide rail above the area to be detected so as to detect the magnetoacoustic electrical signal of the area to be detected;
the imaging module is connected with the detection probe and is used for constructing a magnetoacoustic image according to the signal sent by the detection probe;
the photographic device is arranged on one side of the area to be detected and is used for shooting an image of the area to be detected;
the data processing module comprises a position control unit, an image processing unit and a data correction unit, wherein the position control unit is used for determining coordinate information of detection points according to the outline of a detected body in an image of a region to be detected, controlling an ultrasonic signal excitation probe to move to the position above each detection point according to the coordinate information corresponding to each detection point to carry out ultrasonic signal excitation and controlling the detection probe to move to each detection point to carry out detection so as to obtain a magnetoacoustic image; the position control unit judges whether the frequency and the signal emission duration of the ultrasonic signal emitted by the ultrasonic signal excitation probe are adjusted to carry out ultrasonic signal excitation again on the detection point and carry out detection again through the detection probe according to the qualification judgment result of the magnetoacoustic image by the image processing unit;
the image processing unit is used for calculating image characterization parameters corresponding to the magnetoacoustic images according to artifact areas, noise point quantity and signal-to-noise ratio in the magnetoacoustic images, comparing the image characterization parameters with preset image characterization comparison parameters, and judging whether the magnetoacoustic images are qualified or not according to comparison results;
the data correction unit is used for comparing an interference characterization parameter corresponding to the unqualified magnetoacoustic image with a preset interference comparison parameter and comparing an artifact area corresponding to the unqualified magnetoacoustic image with a preset area comparison parameter, and determining the frequency of an ultrasonic signal emitted by the ultrasonic signal excitation probe and the signal emission duration of the ultrasonic signal when the detection point corresponding to the unqualified magnetoacoustic image is detected again according to the comparison result.
Further, the position control unit determines coordinate information of the detection points based on the contour of the detected body in the image of the region to be detected, wherein,
the position control unit receives the image of the region to be detected sent by the detection probe, establishes a rectangular coordinate system by taking the center of the region to be detected as an origin, divides a plurality of coordinate regions, determines the outline of the detected body in each coordinate region, determines the shape center of the hub, determines the shape center as a detection point, and records the coordinate information corresponding to the detection point.
Further, the position control unit controls the ultrasonic signal excitation probe to perform ultrasonic signal excitation, wherein the position control unit controls the ultrasonic signal excitation probe to continuously emit an ultrasonic signal with a preset standard frequency B0 above a detection point.
Further, the image processing unit judges whether to adjust the frequency and the signal emission duration of the ultrasonic signal emitted by the ultrasonic signal excitation probe to carry out ultrasonic signal excitation again on the detection point according to the qualification judgment result of the magnetoacoustic image, wherein,
if the magneto-acoustic image is qualified, the position control unit judges that the frequency and the signal transmission duration of an ultrasonic signal transmitted by an ultrasonic signal excitation probe are not adjusted, and does not control the ultrasonic signal excitation probe to carry out ultrasonic signal excitation on the detection point again;
and if the magneto-acoustic image is not qualified, the position control unit judges that the frequency of the ultrasonic signal transmitted by the ultrasonic signal excitation probe and the signal transmission duration of the ultrasonic signal need to be adjusted and then controls the ultrasonic signal excitation probe to carry out ultrasonic signal excitation on the detection point again.
Further, the position control unit compares the area of the human body contour in each coordinate region with a first area comparison parameter S1 and a second area comparison parameter S2, and determines the signal transmission duration of the ultrasonic signal when the ultrasonic signal transmitting probe performs the first ultrasonic signal excitation at each detection point according to the comparison result, wherein,
when S is larger than or equal to S2, the position control unit determines that the signal transmission time length of the ultrasonic signal is a preset standard transmission time length T0 when the ultrasonic signal excitation probe carries out first ultrasonic signal excitation at the corresponding detection point;
when S1 is not more than S and less than S2, the position control unit determines that the signal transmitting time of the ultrasonic signal is T0-T1 when the ultrasonic signal excitation probe carries out the first ultrasonic signal excitation at the corresponding detection point;
when S is less than S1, the position control unit determines that the signal transmitting time of the ultrasonic signal is T0-T2 when the ultrasonic signal excitation probe carries out the first ultrasonic signal excitation at the corresponding detection point;
wherein t1 represents a first duration correction parameter, t2 represents a second duration correction parameter, and t1 is less than t2.
Further, the image processing unit acquires magnetoacoustic images formed at different detection points and sent by the imaging module, determines the artifact area, the number of noise points and the signal-to-noise ratio in each magnetoacoustic image, calculates the image characterization parameters E corresponding to each magnetoacoustic image according to the formula (1),
in the formula (1), Y represents a ratio of an artifact area in the magnetoacoustic image to an area of the magnetoacoustic image, Y0 represents a preset artifact area ratio comparison parameter, N represents the number of noise points in the magnetoacoustic image, N0 represents a preset noise point number comparison parameter, C represents a signal-to-noise ratio corresponding to the magnetoacoustic image, and C0 represents a preset signal-to-noise ratio comparison parameter.
Further, the image processing unit compares the image representation parameter E with a preset image representation comparison parameter E0 to determine whether each magnetoacoustic image is qualified, wherein,
when E is larger than or equal to E0, the image processing unit judges that the magneto-acoustic image is unqualified,
when E < E0, the image processing unit judges that the magnetoacoustic image is qualified.
Furthermore, the data correction unit is used for carrying out gray processing on each unqualified magnetoacoustic image, determining the gray value of each noise point, setting a preset gray reference quantity H, calculating the interference characterization parameter G corresponding to each unqualified magnetoacoustic image according to a formula (2),
n (i) in equation (2) indicates that the gray value is the number of noise points of i.
Further, the data correction unit is used for comparing the interference characterization parameter G corresponding to the unqualified magnetic acoustic image with a preset interference comparison parameter G1 and comparing the artifact area Se corresponding to the unqualified magnetic acoustic image with a preset area comparison parameter Se1, and determining the frequency of the ultrasonic signal emitted by the ultrasonic signal excitation probe and the signal emission duration of the ultrasonic signal when the detection point corresponding to the unqualified magnetic acoustic image is detected again according to the comparison result, wherein,
when G is larger than or equal to G1, the data correction unit determines that the frequency of the ultrasonic signal needs to be reduced by B2;
when G < G1, the data correction unit determines that the frequency of the ultrasonic signal needs to be reduced by B1;
when Y is larger than or equal to Se1, the data correction unit determines that the signal emission duration of the ultrasonic signal needs to be increased by T2;
when Y is less than Se1, the data correction unit determines that the signal emission time length of the ultrasonic signal needs to be increased by T1;
wherein, B1 represents a first preset intensity adjustment quantity, B2 represents a second preset intensity adjustment quantity, B1 is less than B2, T1 represents a first preset duration adjustment parameter, and T2 represents a second preset duration adjustment parameter.
Furthermore, the invention also comprises a touch display screen which is used for displaying the magnetic sound image and inputting the control instruction through touch.
The invention also provides a method for applying the integrated intelligent imaging system based on the optomagnetic sound, which comprises the steps of placing a body to be detected into a region to be detected, inputting a control instruction through a touch display screen, and controlling the intelligent imaging system to start detecting the body to be detected and forming an image.
Compared with the prior art, the ultrasonic imaging device has the advantages that the magnetic field construction module, the ultrasonic signal excitation probe, the detection probe, the imaging module, the photographing device and the data processing module are arranged, ultrasonic signal excitation is carried out on the detected body through the ultrasonic signal excitation probe, the detection probe is used for detecting the detected body and constructing the magnetoacoustic image, whether the magnetoacoustic image is qualified or not is determined through the constructed magnetoacoustic image, whether ultrasonic signal excitation and detection are carried out on the detection point corresponding to the magnetoacoustic image again or not is judged, the ultrasonic signal emission frequency and the emission duration of the ultrasonic excitation probe are correspondingly adjusted through the interference characterization parameter and the artifact area corresponding to the constructed magnetoacoustic image when ultrasonic signal excitation and detection are carried out again, magnetoacoustic image construction is avoided, the signal to noise ratio of the image is improved, and the imaging quality is improved.
Particularly, the invention obtains the image in the detected region through the photographic device, determines the detection point through the position control unit, carries out ultrasonic signal excitation and detection on the detected body on the detection point, considers the difference of each part, ensures that the determined detection point can lead the central region of the ultrasonic signal excitation probe to cover the detected body, simultaneously divides the detection point, preliminarily adjusts the signal emission duration of the required ultrasonic signal according to the size of the outline of the detected body in the detected region during the first detection, reduces the influence of the difference of each region of the detected body on the imaging, further improves the signal-to-noise ratio of the final image and improves the imaging quality.
Particularly, the image characterization parameters are correspondingly calculated by acquiring the artifact area, the noise quantity and the signal-to-noise ratio in the constructed magnetoacoustic image, the artifact area, the noise quantity and the signal-to-noise ratio are important factors capable of reflecting the image quality, the artifact is possibly generated in the actual situation due to insufficient ultrasonic excitation, so that the artifact occurs in the imaging due to weak signals, and the signal interference is possibly generated between the frequency of ultrasonic signal excitation and electromagnetism in the case of excessive noise or high signal-to-noise ratio.
Particularly, the invention carries out gray processing on the generated image, determines the quantity of noise points and the gray value corresponding to the noise points, calculates the interference characterization parameter G, and the quantity of the noise points and the gray value can reflect the interference degree, and the gray value of the noise points generated by electromagnetic interference is higher, so that the frequency of the ultrasonic signal is adjusted by taking the gray value as a reference, the frequency of the ultrasonic signal is properly reduced, the signal interference generated between the ultrasonic wave and the electromagnetism can be properly reduced on the basis of ensuring imaging, the imaging quality is further improved, and the signal-to-noise ratio of the image is improved.
Particularly, the signal emission time of the ultrasonic signal excitation probe is adjusted according to the artifact area in the generated image, the difference of the detected body in each area has an influence on the uniformity of a magnetic field, the difference also has an influence on the ultrasonic excitation effect, and sometimes insufficient excitation can generate artifacts in the final image.
Drawings
FIG. 1 is a schematic structural diagram of an integrated intelligent imaging system based on optomagnetic sound according to an embodiment of the invention;
FIG. 2 is a block diagram of a data processing module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of detection points of a to-be-detected area according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 and fig. 2, which are schematic structural diagrams of an integrated intelligent imaging system based on optomagnetic sound and a schematic structural diagram of a data processing module according to an embodiment of the present invention, the integrated intelligent imaging system based on optomagnetic sound of the present invention includes:
a magnetic field construction module to form a magnetic field in an area to be detected;
the ultrasonic signal excitation probe comprises a laser generating unit and a light energy conversion unit which are both arranged on a slide rail above an area to be detected, wherein the laser generating unit is used for emitting laser to the light energy conversion unit, and the light energy conversion unit is used for converting light energy into an ultrasonic signal and then emitting the ultrasonic signal;
the detection probe is arranged on the slide rail above the area to be detected so as to detect the magnetoacoustic electrical signal of the area to be detected;
the imaging module is connected with the detection probe and used for constructing a magnetoacoustic image according to a signal sent by the detection probe;
the photographic device is arranged on one side of the area to be detected and is used for shooting an image of the area to be detected;
the data processing module comprises a position control unit, an image processing unit and a data correction unit, wherein the position control unit is connected with the ultrasonic signal excitation probe and the detection probe so as to control the ultrasonic signal excitation probe and the detection probe to move on the sliding rail, determine coordinate information of detection points according to the outline of a detected body in an image of a region to be detected, control the ultrasonic signal excitation probe to move above each detection point according to the coordinate information corresponding to each detection point to perform ultrasonic signal excitation and control the detection probe to move to each detection point to perform detection so as to obtain a magnetoacoustic image; the position control unit judges whether to adjust the frequency and the signal emission duration of the ultrasonic signal emitted by the ultrasonic signal excitation probe to carry out ultrasonic signal excitation again on the detection point and detect again through the detection probe according to the qualification judgment result of the magnetoacoustic image by the image processing unit;
the image processing unit is connected with the imaging module to obtain a magnetoacoustic image constructed by the imaging module, is used for calculating image characterization parameters corresponding to each magnetoacoustic image according to artifact areas, noise quantity and signal-to-noise ratio in the magnetoacoustic image, compares the image characterization parameters with preset image characterization comparison parameters, and judges whether each magnetoacoustic image is qualified or not according to comparison results;
the data correction unit is used for comparing an interference characterization parameter corresponding to an unqualified magneto-acoustic image with a preset interference comparison parameter, comparing an artifact area corresponding to the unqualified magneto-acoustic image with a preset area comparison parameter, and determining the frequency of an ultrasonic signal emitted by the ultrasonic signal excitation probe and the signal emission duration of the ultrasonic signal when a detection point corresponding to the unqualified magneto-acoustic image is detected again according to a comparison result.
Specifically, the specific structure of the magnetic field construction module is not limited, and the magnetic field construction module can be a single magnet or a plurality of magnets, and only needs to form a magnetic field around the area to be detected.
Specifically, the specific structure of the ultrasonic signal excitation probe is not limited in the present invention, and the probe may be a probe that excites an ultrasonic signal with laser, and can form a more concentrated ultrasonic beam, so as to further realize excitation of each part, or may be other ultrasonic emission devices, which are all mature prior art and will not be described herein again.
Specifically, the present invention does not limit the specific structure of the detection probe, and it may be a detection coil for detecting the electromagnetic signal of the region to be detected.
Specifically, the specific structure of the imaging module is not limited in the present invention, and the imaging module may be a computer with an image reconstruction algorithm preset therein, or may be another structure.
Specifically, the specific structure of the photographing device is not limited, and the photographing device can be a camera or a camera arranged on one side of the area to be detected, and only needs to acquire a real-time image in the area to be detected.
Specifically, the specific structure of the data processing module is not limited, and each unit in the data processing module can be a plurality of external computers, and only data processing, data receiving and data sending can be completed.
Specifically, the moving mode of the ultrasonic signal excitation probe and the detection probe is not specifically limited in the present invention, and the ultrasonic signal excitation probe and the detection probe may be disposed on a slide rail, and the ultrasonic excitation at different positions is realized by moving on the slide rail, or may be disposed on a robot arm, and the robot arm realizes a moving function.
Specifically, referring to fig. 3, the position control unit determines the coordinate information of the detection point according to the contour of the detected object in the image of the region to be detected, wherein,
the position control unit receives the image of the region to be detected sent by the detection probe, establishes a rectangular coordinate system by taking the center of the region to be detected as an origin, divides a plurality of coordinate regions, determines the outline of the detected body in each coordinate region, determines the shape center of the hub, determines the shape center as a detection point, and records the coordinate information corresponding to the detection point.
Specifically, the position control unit controls the ultrasonic signal excitation probe to perform ultrasonic signal excitation, wherein the position control unit controls the ultrasonic signal excitation probe to continuously emit an ultrasonic signal with a preset standard frequency B0 above a detection point.
Specifically, the image processing unit determines whether to adjust the frequency and the signal emission time length of the ultrasonic signal emitted by the ultrasonic signal excitation probe to perform ultrasonic signal excitation again on the detection point according to the qualification determination result of the magnetoacoustic image, wherein,
if the magnetoacoustic image is qualified, the position control unit judges that the frequency of the ultrasonic signal transmitted by the ultrasonic signal excitation probe is not adjusted and the signal transmission duration does not control the ultrasonic signal excitation probe to carry out ultrasonic signal excitation on the detection point again;
and if the magneto-acoustic image is not qualified, the position control unit judges that the frequency of the ultrasonic signal transmitted by the ultrasonic signal excitation probe and the signal transmission duration of the ultrasonic signal need to be adjusted and then controls the ultrasonic signal excitation probe to carry out ultrasonic signal excitation on the detection point again.
Specifically, the position control unit compares the area of the human body contour in each coordinate region with a first area comparison parameter S1 and a second area comparison parameter S2, and determines the signal transmission duration of the ultrasonic signal when the ultrasonic signal transmission probe performs the first ultrasonic signal excitation at each detection point according to the comparison result, wherein,
when S is larger than or equal to S2, the position control unit determines that the signal transmission time of the ultrasonic signal is the preset standard transmission time T0 when the ultrasonic signal excitation probe carries out the first ultrasonic signal excitation at the corresponding detection point;
when S1 is not less than S and less than S2, the position control unit determines that the signal transmitting time of the ultrasonic signal is T0-T1 when the ultrasonic signal excitation probe carries out first ultrasonic signal excitation at the corresponding detection point;
when S is less than S1, the position control unit determines that the signal transmitting time of the ultrasonic signal is T0-T2 when the ultrasonic signal excitation probe carries out the first ultrasonic signal excitation at the corresponding detection point;
wherein t1 represents a first duration correction parameter, t2 represents a second duration correction parameter, and t1 is less than t2.
Specifically, the invention obtains the image in the detected region through the photographic device, determines the detection point through the position control unit, performs ultrasonic signal excitation and detection on the detected body on the detection point, considers the difference of each part, ensures that the determined detection point can enable the central region of the ultrasonic signal excitation probe to cover the detected body, simultaneously divides the detection point, preliminarily adjusts the signal emission duration of the required ultrasonic signal according to the size of the outline of the detected body in the detected region during the first detection, reduces the influence of the difference of each region of the detected body on the imaging, further improves the signal-to-noise ratio of the final image, and improves the imaging quality.
Specifically, the image processing unit acquires magnetoacoustic images formed at different detection points and sent by an imaging module, determines the artifact area, the noise point quantity and the signal-to-noise ratio in each magnetoacoustic image, calculates the image characterization parameters E corresponding to each magnetoacoustic image according to a formula (1),
in the formula (1), Y represents a ratio of an artifact area in the magnetoacoustic image to a magnetoacoustic image area, Y0 represents a preset artifact area ratio comparison parameter, N represents the number of noise points in the magnetoacoustic image, N0 represents a preset noise point number comparison parameter, C represents a signal-to-noise ratio corresponding to the magnetoacoustic image, and C0 represents a preset signal-to-noise ratio comparison parameter.
Specifically, the image processing unit compares the image representation parameter E with a preset image representation comparison parameter E0 to determine whether each magnetoacoustic image is qualified or not, wherein,
when E is larger than or equal to E0, the image processing unit judges that the magneto-acoustic image is unqualified,
when E < E0, the image processing unit judges that the magnetoacoustic image is qualified.
Specifically, the image characterization parameters are correspondingly calculated by acquiring the artifact area, the noise number and the signal-to-noise ratio in the constructed magnetoacoustic image, the artifact area, the noise number and the signal-to-noise ratio are important factors capable of reflecting the image quality, the artifact is possibly generated in the actual situation due to insufficient ultrasonic excitation, so that the signal is weak and the artifact is generated in the imaging, and the signal interference is possibly generated between the high frequency of the ultrasonic signal excitation and the electromagnetism in the case of excessive noise or high signal-to-noise ratio.
Specifically, the data correction unit is used for carrying out gray processing on each unqualified magnetoacoustic image, determining the gray value of each noise point, setting a preset gray reference quantity H, calculating the interference characterization parameter G corresponding to each unqualified magnetoacoustic image according to a formula (2),
n (i) in equation (2) indicates that the gray value is the number of noise points of i.
Specifically, the method performs gray processing on the generated image, determines the number of noise points and the gray value corresponding to the noise points, calculates the interference characterization parameter G, and the number of the noise points and the height of the gray value can reflect the interference degree, and the gray value of the noise points generated by electromagnetic interference is higher, so that the frequency of the ultrasonic signal is adjusted by taking the gray value as a reference, the frequency of the ultrasonic signal is properly reduced, the signal interference generated between ultrasonic waves and electromagnetism can be properly reduced on the basis of ensuring imaging, the imaging quality is improved, and the signal to noise ratio of the image is improved
Specifically, the data correction unit is used for comparing an interference characterization parameter G corresponding to an unqualified magnetoacoustic image with a preset interference comparison parameter G1 and comparing an artifact area Se corresponding to the unqualified magnetoacoustic image with a preset area comparison parameter Se1, and determining the frequency of an ultrasonic signal emitted by the ultrasonic signal excitation probe and the signal emission duration of the ultrasonic signal when a detection point corresponding to the unqualified magnetoacoustic image is detected again according to a comparison result, wherein,
when G is larger than or equal to G1, the data correction unit determines that the frequency of the ultrasonic signal needs to be reduced by B2;
when G < G1, the data correction unit determines that the frequency of the ultrasonic signal needs to be reduced by B1;
when Y is larger than or equal to Se1, the data correction unit determines that the signal emission duration of the ultrasonic signal needs to be increased by T2;
when Y is less than Se1, the data correction unit determines that the signal emission time length of the ultrasonic signal needs to be increased by T1;
wherein, B1 represents a first preset intensity adjustment quantity, B2 represents a second preset intensity adjustment quantity, B1 is less than B2, T1 represents a first preset duration adjustment parameter, and T2 represents a second preset duration adjustment parameter.
Specifically, the signal emission time of the ultrasonic signal excitation probe is adjusted according to the artifact area in the generated image, the difference of the detected body in each area has an influence on the uniformity of a magnetic field, the difference also has an influence on the ultrasonic excitation effect, and sometimes insufficient excitation causes artifacts in the final image.
Specifically, the invention also comprises a touch display screen which is used for displaying the magnetic sound image and inputting the control instruction through touch.
The invention also provides a method for applying the integrated intelligent imaging system based on the optomagnetic sound, which comprises the steps of placing the body to be detected into the area to be detected, inputting a control instruction through the touch display screen, and controlling the intelligent imaging system to start detecting the body to be detected and forming an image.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. An integrated intelligent imaging system based on optomagnetic sound is characterized by comprising:
a magnetic field construction module to form a magnetic field in the region to be detected;
the ultrasonic signal excitation probe is arranged on the slide rail above the area to be detected and used for transmitting an ultrasonic signal to the body to be detected;
the detection probe is arranged on the slide rail above the area to be detected so as to detect the magnetoacoustic electrical signal of the area to be detected;
the imaging module is connected with the detection probe and is used for constructing a magnetoacoustic image according to the signal sent by the detection probe;
the photographic device is arranged on one side of the area to be detected and is used for shooting an image of the area to be detected;
the data processing module comprises a position control unit, an image processing unit and a data correction unit, wherein the position control unit is used for determining the coordinate information of the detection points, controlling the ultrasonic signal excitation probe to move above each detection point according to the coordinate information corresponding to each detection point to carry out ultrasonic signal excitation and controlling the detection probe to move to each detection point to carry out detection so as to obtain a magnetoacoustic image; the position control unit judges whether the frequency and the signal emission duration of the ultrasonic signal emitted by the ultrasonic signal excitation probe are adjusted to carry out ultrasonic signal excitation again on the detection point and carry out detection again through the detection probe according to the qualification judgment result of the magnetoacoustic image by the image processing unit;
the image processing unit is used for calculating image characterization parameters corresponding to the magnetoacoustic images according to artifact areas, noise point quantity and signal-to-noise ratio in the magnetoacoustic images, comparing the image characterization parameters with preset image characterization comparison parameters, and judging whether the magnetoacoustic images are qualified or not according to comparison results;
the data correction unit is used for comparing an interference characterization parameter corresponding to an unqualified magnetic-acoustic image with a preset interference comparison parameter, comparing an artifact area corresponding to the unqualified magnetic-acoustic image with a preset area comparison parameter, and determining the frequency of an ultrasonic signal emitted by the ultrasonic signal excitation probe and the signal emission duration of the ultrasonic signal when a detection point corresponding to the unqualified magnetic-acoustic image is detected again according to a comparison result;
the data correction unit is used for carrying out gray processing on each unqualified magnetoacoustic image, determining the gray value of each noise point, setting a preset gray reference quantity H, calculating an interference characterization parameter G corresponding to each unqualified magnetoacoustic image according to a formula (2),
in formula (2), N (i) represents the number of noise points whose gray scale value is i.
2. The integrated optomagnetic-acoustic-based intelligent imaging system according to claim 1, wherein the position control unit determines coordinate information of the detection points based on a contour of the detected body in the region image to be detected, wherein,
the position control unit receives the image of the region to be detected sent by the detection probe, establishes a rectangular coordinate system by taking the center of the region to be detected as an origin, divides a plurality of coordinate regions, determines the outline of the detected body in each coordinate region, determines the shape center of the hub, determines the shape center as a detection point, and records the coordinate information corresponding to the detection point.
3. The integrated intelligent imaging system based on optomagnetic sound as claimed in claim 2, wherein the position control unit controls the ultrasonic signal excitation probe to perform ultrasonic signal excitation, wherein the position control unit controls the ultrasonic signal excitation probe to continuously emit an ultrasonic signal with a preset standard frequency B0 above a detection point.
4. The integrated intelligent imaging system based on optomagnetic sound as claimed in claim 3, wherein the image processing unit determines whether to adjust the frequency and the signal emission duration of the ultrasonic signal emitted by the ultrasonic signal excitation probe to perform ultrasonic signal excitation again on the detection point according to the qualification determination result of the magnetoacoustic image, wherein,
if the magneto-acoustic image is qualified, the position control unit judges that the frequency and the signal transmission duration of an ultrasonic signal transmitted by an ultrasonic signal excitation probe are not adjusted, and does not control the ultrasonic signal excitation probe to carry out ultrasonic signal excitation on the detection point again;
and if the magneto-acoustic image is not qualified, the position control unit judges that the frequency of the ultrasonic signal transmitted by the ultrasonic signal excitation probe and the signal transmission duration of the ultrasonic signal need to be adjusted and then controls the ultrasonic signal excitation probe to perform ultrasonic signal excitation on the detection point again.
5. The integrated intelligent imaging system based on optomagnetic sound as claimed in claim 3, wherein the position control unit compares the area of the human body contour in each of the coordinate regions with a first area comparison parameter S1 and a second area comparison parameter S2, and determines the signal transmission duration of the ultrasonic signal when the ultrasonic signal transmission probe performs the first ultrasonic signal excitation at each detection point according to the comparison result, wherein,
when S is larger than or equal to S2, the position control unit determines that the signal transmission time of the ultrasonic signal is the preset standard transmission time T0 when the ultrasonic signal excitation probe carries out the first ultrasonic signal excitation at the corresponding detection point;
when S1 is not less than S and less than S2, the position control unit determines that the signal transmitting time of the ultrasonic signal is T0-T1 when the ultrasonic signal excitation probe carries out first ultrasonic signal excitation at the corresponding detection point;
when S is less than S1, the position control unit determines that the signal transmitting time of the ultrasonic signal is T0-T2 when the ultrasonic signal excitation probe carries out the first ultrasonic signal excitation at the corresponding detection point;
wherein t1 represents a first duration correction parameter, t2 represents a second duration correction parameter, and t1 is less than t2.
6. The integrated intelligent imaging system based on optomagnetic sound of claim 4, wherein the image processing unit obtains the magnetoacoustic images formed at different detection points and sent by the imaging module, determines the artifact area, the noise amount and the signal-to-noise ratio in each magnetoacoustic image, and calculates the image characterization parameters E corresponding to each magnetoacoustic image according to the formula (1),
in the formula (1), Y represents a ratio of an artifact area in the magnetoacoustic image to an area of the magnetoacoustic image, Y0 represents a preset artifact area ratio comparison parameter, N represents the number of noise points in the magnetoacoustic image, N0 represents a preset noise point number comparison parameter, C represents a signal-to-noise ratio corresponding to the magnetoacoustic image, and C0 represents a preset signal-to-noise ratio comparison parameter.
7. The integrated intelligent imaging system based on optomagnetic sound as claimed in claim 6, wherein the image processing unit compares the image representation parameter E with a preset image representation comparison parameter E0 to determine whether each magnetoacoustic image is qualified, wherein,
when E is larger than or equal to E0, the image processing unit judges that the magneto-acoustic image is unqualified,
when E < E0, the image processing unit judges that the magneto-acoustic image is acceptable.
8. The integrated intelligent imaging system based on optomagnetic sound of claim 7, wherein the data correction unit is configured to compare the interference characterization parameter G corresponding to the unqualified magnetoacoustic image with a preset interference comparison parameter G1 and compare the artifact area Se corresponding to the unqualified magnetoacoustic image with a preset area comparison parameter Se1, and determine the frequency of the ultrasonic signal emitted by the ultrasonic signal excitation probe and the signal emission duration of the ultrasonic signal when the detection point corresponding to the unqualified magnetoacoustic image is detected again according to the comparison result, wherein,
when G is larger than or equal to G1, the data correction unit determines that the frequency of the ultrasonic signal needs to be reduced by B2;
when G < G1, the data correction unit determines that the frequency of the ultrasonic signal needs to be reduced by B1;
when Y is larger than or equal to Se1, the data correction unit determines that the signal emission duration of the ultrasonic signal needs to be increased by T2;
when Y is less than Se1, the data correction unit determines that the signal emission time length of the ultrasonic signal needs to be increased by T1;
wherein, B1 represents a first preset intensity adjustment quantity, B2 represents a second preset intensity adjustment quantity, B1 is less than B2, T1 represents a first preset time length adjustment parameter, and T2 represents a second preset time length adjustment parameter.
9. A method of applying the integrated intelligent imaging system based on optomagnetic sound of any one of claims 1 to 8,
and placing the body to be detected into the area to be detected, inputting a control instruction through the touch display screen, and controlling the intelligent imaging system to start detecting the body to be detected and forming an image.
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