CN116523796A - Vascular image correction method, device, system and medium - Google Patents
Vascular image correction method, device, system and medium Download PDFInfo
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- 238000003702 image correction Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000002792 vascular Effects 0.000 title claims description 18
- 210000004204 blood vessel Anatomy 0.000 claims abstract description 375
- 239000003550 marker Substances 0.000 claims description 52
- 238000012937 correction Methods 0.000 claims description 40
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- 238000002608 intravascular ultrasound Methods 0.000 description 12
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/80—Geometric correction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10132—Ultrasound image
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30101—Blood vessel; Artery; Vein; Vascular
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Abstract
The embodiment of the invention discloses a blood vessel image correction method, a device, a system and a medium, wherein the method comprises the following steps: acquiring a blood vessel image to be corrected, and determining whether the blood vessel image to be corrected contains a group of mark points; when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected; determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information; and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image. The embodiment of the invention solves the problem of the distortion of the blood vessel image caused by uneven rotation of the rotating wire, and improves the accuracy of the blood vessel morphology in the blood vessel image.
Description
Technical Field
The present invention relates to the field of medical image processing technology, and in particular, to a blood vessel image correction method, device, system, and medium.
Background
An intravascular ultrasound (intravenous ultrasound, IVUS) imaging system includes a special catheter with an ultrasound probe attached at the end. By placing an ultrasound probe into the cardiovascular cavity, a cardiovascular cross-sectional morphology and/or blood flow pattern can be displayed.
Due to the complex vascular structure, the performance of the wire-transferring/sheath tube in the rotating and withdrawing process of the intravascular ultrasound imaging system is possibly damaged, and the wire-transferring is not uniformly rotated, so that the obtained vascular image is distorted, and the real vascular morphology cannot be reflected.
Disclosure of Invention
The invention provides a blood vessel image correction method, a blood vessel image correction device, a blood vessel image correction system and a blood vessel image correction medium, which improve the accuracy of blood vessel morphology in blood vessel images acquired by an intravascular ultrasound imaging system.
According to an aspect of the present invention, there is provided a blood vessel image correction method including:
acquiring a blood vessel image to be corrected, and determining whether the blood vessel image to be corrected contains a group of mark points;
when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected;
determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information;
and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image.
According to another aspect of the present invention, there is provided a blood vessel image correction device including:
The blood vessel image acquisition module is used for acquiring a blood vessel image to be corrected and determining whether the blood vessel image to be corrected contains a group of mark points or not;
the mark point pixel position information extraction module is used for extracting the actual mark point pixel position information of a group of mark points in the blood vessel image to be corrected when the blood vessel image to be corrected contains the group of mark points;
the mark point offset information determining module is used for determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information;
and the blood vessel image correction module is used for correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image.
According to another aspect of the present invention, there is provided a blood vessel image correction system, the system comprising:
the ultrasonic catheter is used for acquiring a blood vessel image to be corrected;
the at least one developing and marking component is arranged on the sheath wall of the ultrasonic catheter, so that the position of the corresponding developing and marking component in the blood vessel image to be corrected can present pixel information of a group of marking points;
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the vessel image correction method of any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a blood vessel image correction method according to any one of the embodiments of the present invention.
According to the technical scheme, the blood vessel image to be corrected is obtained, and whether the blood vessel image to be corrected contains a group of mark points or not is determined; when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected; determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information; and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image. According to the technical scheme provided by the embodiment of the invention, the problem of blood vessel image distortion caused by uneven rotation of the rotating wire is solved, and the accuracy of blood vessel morphology in the blood vessel image is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for vessel image correction provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic illustration of a developer ring provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of an intravascular ultrasound imaging system according to an embodiment of the invention;
FIG. 4 is a schematic illustration of a blood vessel image to be corrected provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic illustration of a physical scalloped area provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic illustration of a marker point reference image provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic illustration of a reference sector area provided in accordance with an embodiment of the present invention;
FIG. 8 is a flow chart of another method for vessel image correction provided in accordance with an embodiment of the present invention;
Fig. 9 is a block diagram of a blood vessel image correction device provided according to an embodiment of the present invention;
fig. 10 is a block diagram of a blood vessel image correction system according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first" and "second" and the like in the description and the claims of the present invention and the above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart of a blood vessel image correction method according to an embodiment of the present invention, which is applicable to an intravascular ultrasound imaging system provided with a marker point, and which may be performed by a blood vessel image correction device that may be implemented in hardware and/or software and configured in a processor of the blood vessel image correction system.
As shown in fig. 1, the blood vessel image correction method of the present embodiment includes the steps of:
s110, acquiring a blood vessel image to be corrected, and determining whether the blood vessel image to be corrected contains a group of mark points.
Wherein the vessel image to be corrected is a vessel cross-sectional image of the imaging component (the filar) of the IVUS imaging system at any actual position in the vessel.
The marker points may be markers of any shape and size, provided that they can be presented as a set of marker points in the vessel image, and do not obscure the vessel image too much.
In general, the rotation wire rotates unevenly, and the blood vessel section image has a problem that the real blood vessel structure cannot be reflected, so in a specific embodiment, the blood vessel image to be corrected is acquired through an ultrasonic catheter, wherein a developing marking component is arranged on the sheath wall of the ultrasonic catheter, so that pixel information of a group of marking points is presented at positions corresponding to the developing marking component in the blood vessel image to be corrected.
It is understood that, when the section of the blood vessel at the position corresponding to the position where the developing mark member is provided is imaged, the developing mark member will block the blood vessel and affect the imaging result of the blood vessel at that position, so that the number of developing mark members cannot be excessive. Specifically, when the material characteristic of the developing mark component causes the imaging of the blood vessel section of the blood vessel position corresponding to the setting position of the developing mark component, the ultrasonic signal at the position is influenced, so that the brightness of the image at the position in the imaging result is lower than the brightness of the image at the position where the developing mark component is not arranged, and the imaging result of the blood vessel at the position is influenced. Therefore, in practical application, the material of the developing mark component can be selected, the attenuation of ultrasonic waves is reduced, and the imaging result that the developing mark component does not completely shade the blood vessel at the position is obtained.
In one embodiment, when the imaging of the blood vessel section of the blood vessel position corresponding to the setting position of the developing mark member is caused due to the material property of the developing mark member, the pixel information of a group of mark points in the blood vessel section image presents a pixel with high gray scale because the developing mark member obstructs the imaging of the blood vessel. Specifically, when a group of pixel information of mark points for shielding blood vessels exists in the blood vessel image to be corrected, the blood vessel image to be corrected contains a group of mark points; when the pixel information of a group of mark points for shielding the blood vessel does not exist in the blood vessel image to be corrected, the blood vessel image to be corrected does not contain a group of mark points.
When the blood vessel section at any actual position in the imaging positions of the blood vessel images is at the blood vessel position corresponding to the setting position of the developing mark component, acquiring the blood vessel section image at the actual position through a rotating wire, wherein the blood vessel section image comprises pixel information of a group of mark points, and the rotating wire is positioned in an ultrasonic catheter. It will be appreciated that since the rotation wire acquires a blood vessel cross-sectional image, the blood vessel cross-sectional image will only contain a set of marker points at most.
S120, when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected.
The actual position information of the pixels of the marking points can be coordinates of pixels of the marking points in the blood vessel image to be corrected or other information for representing positions of the marking points in the blood vessel image to be corrected.
Specifically, when a group of mark points of the developing mark component exist in the blood vessel image to be corrected, the group of mark points present pixel information of the group of mark points in the blood vessel image to be corrected, coordinates of the pixel information of the group of mark points in the blood vessel image to be corrected are determined, and actual mark point pixel position information of the group of mark points is obtained.
S130, determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information.
The marker point reference pixel position information is coordinates of a set of marker point pixels in a blood vessel cross-sectional image of a position of the developing marker component in the blood vessel when the rotation wire is uniformly rotated, or other information for representing the position of a set of marker points in the blood vessel cross-sectional image.
The offset information may include a difference between a distance between the pixel position information of the actual mark point and the pixel of the adjacent mark point determined by the pixel position information of the mark point reference, a difference between a occupied area of the pixel of each mark point and a difference between a central angle of the sector area occupied by the pixel corresponding to each mark point, and may further include a difference between other quantization indexes calculated based on the distance/area/central angle.
Alternatively, the actual pixel location information of a set of marker points in the vessel image to be corrected is identified using existing image segmentation/object detection based algorithms or trained image processing models.
Further, determining offset information for each marker point based on the actual marker point pixel position information and the marker point reference pixel position information includes:
First, based on the actual marker pixel position information, the actual sector area corresponding to each marker is divided in the blood vessel image to be corrected.
Wherein each actual sector area comprises pixel information of a marking point in the image of the blood vessel to be detected and pixel information corresponding to the blood vessel adjacent to the pixel information.
In a specific embodiment, as shown in fig. 2, the developing marking component is a developing ring, as shown in fig. 3, the developing ring 77 is disposed on a sheath 88 of an imaging component (a rotating wire) 66 of the IVUS imaging system, and fig. 4 is a blood vessel image to be corrected corresponding to the developing ring at a setting position thereof, the blood vessel image to be corrected includes pixel information of a set (24) of marking points, and coordinates of marking point pixels in the blood vessel image to be corrected in the set of marking points are extracted as actual marking point pixel position information. As shown in fig. 4, the pixel information of the mark point of the developing ring in the blood vessel image to be corrected is a black part, and a white part in the same circumference as the black part is the pixel information of the blood vessel. Based on the actual marking point pixel position information of the marking point of the developing ring in the blood vessel image to be corrected, the position of the leftmost pixel point of the pixel position information of each actual marking point is taken as the starting point of each sector area, and the sector area where each marking point is located is obtained by dividing the sector area as shown in fig. 5 and is taken as the actual sector area.
Optionally, the division of the sector area is performed by taking the position of the pixel point at the rightmost end of the pixel position information of each actual marking point as the start point of each sector area, which is not limited in detail in this embodiment.
Then, the reference sector area corresponding to each mark point is divided in the mark point reference image based on the mark point reference pixel position information.
The marking point reference image is a blood vessel image in which marking points in the developing marking component are uniformly distributed.
Alternatively, the marker point reference image may not include pixel information of the blood vessel, as long as it is ensured that all marker points are uniformly distributed on the circumference.
Pixel information of one marker point in the blood vessel image to be corrected and pixel information of a blood vessel adjacent to the pixel information are included in each reference sector.
In a specific embodiment, the mark point reference image is shown in fig. 6, and the pixels of the mark points of the developing ring in the mark point reference image are black portions. Based on the mark point reference pixel position information of the mark point of the developing ring in the mark point reference image, the position of the leftmost pixel point of the pixel position information of each reference mark point is taken as the starting point of each sector area, and the sector area where each mark point is located is obtained by dividing the sector area as shown in fig. 7 and is taken as the reference sector area.
Optionally, the division of the sector area is performed by taking the position of the pixel point at the rightmost end of the pixel position information of each reference mark point as the starting point of each sector area, so long as the division rule of the reference sector area and the actual sector area is consistent.
And finally, determining the offset information of each marking point according to the actual sector area and the reference sector area.
Specifically, the difference between the corresponding central angles of the sector areas occupied by the pixel information of each marking point in the actual sector area and the reference sector area is used as the offset information of each marking point.
Alternatively, the difference in the sector area or arc length between the actual sector and the reference sector may be used as the offset information for each marker point.
And S140, correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image.
Specifically, if the offset information is not 0, according to the offset information, the actual marking point pixel position information in the blood vessel image to be corrected is adjusted to be consistent with the marking point reference pixel position information, namely, the distance between adjacent marking point pixels in the blood vessel image to be corrected is adjusted to be the distance between the marking point reference pixel position information corresponding to the adjacent marking point pixels; or, adjusting the occupied area of all pixels of each marking point in the blood vessel image to be corrected to be the occupied area of all pixels of each marking point of the marking point reference pixel position information.
In a specific embodiment, according to each offset information, the central angle of each corresponding actual sector area is adjusted, so as to obtain a target blood vessel image. Specifically, if the offset of the marker point is not 0, the central angle of each actual sector is adjusted to the central angle of the reference sector, and the image after the central angle adjustment is used as the target blood vessel image. The method has the advantages that the marking points are identified, and the sector area where the marking points are located is adjusted so as to correct the pixels corresponding to the blood vessels in the same sector area, and a target blood vessel image is obtained.
Alternatively, since the marker points in the reference blood vessel image are uniformly distributed, the marker point reference blood vessel image may not be acquired, but the angle of the central angle corresponding to the reference sector area is obtained by calculating (360 °/the number of marker points) according to the number of marker points, and the angle of the central angle is used as marker point reference pixel position information to correct the blood vessel image to be corrected.
According to the technical scheme, the blood vessel image to be corrected is obtained, and whether the blood vessel image to be corrected contains a group of mark points or not is determined; when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected; determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information; and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image. According to the technical scheme provided by the embodiment of the invention, the problem of blood vessel image distortion caused by uneven rotation of the rotating wire is solved, and the accuracy of blood vessel morphology in the blood vessel image is improved.
FIG. 8 is a flow chart of another method for vessel image correction provided in accordance with an embodiment of the present invention; the present embodiment belongs to the same inventive concept as the blood vessel image correction method in the above embodiment, and further describes a process of performing blood vessel image correction on a blood vessel image to be corrected when the blood vessel image to be corrected does not contain the mark point pixel position information. The method may be performed by a vessel image correction device, which may be implemented in software and/or hardware, and which is configured in a vessel image correction system processor.
As shown in fig. 8, the blood vessel image correction method of the present embodiment includes the steps of:
s210, acquiring a blood vessel image to be corrected, and determining whether the blood vessel image to be corrected contains a group of mark points.
S220, when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected.
S230, determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information.
S240, correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image.
S250, when the blood vessel image to be corrected does not contain the mark point pixel information, acquiring a corrected reference blood vessel image adjacent to the blood vessel image to be corrected and containing the mark point pixel information.
After S210, if a set of marker points is included in the blood vessel image to be corrected, S220, S230, and S240 are performed; if a set of marker points is not included in the blood vessel image to be corrected, S250 and S260 are performed.
When only one development mark member is provided in the IVUS imaging system, the imaging position of the corrected reference blood vessel image is adjacent to the imaging position of the blood vessel image to be corrected, and the imaging position is closest to the imaging position of the blood vessel image to be corrected, and the corrected reference blood vessel image includes a blood vessel cross-sectional image corresponding to the development mark member setting position.
When a plurality of developing mark components are arranged at set distance intervals in the IVUS imaging system, the position of the imaging component wire rotating is positioned between two adjacent developing mark components, and mark point pixel information is not included in the blood vessel image to be corrected at the imaging position of the blood vessel image. The corrected reference blood vessel image is adjacent to the blood vessel image to be corrected, and the imaging position of the corrected reference blood vessel image includes a development mark member setting position, and the corrected reference blood vessel image includes a blood vessel cross-sectional image corresponding to the development mark member setting position. Illustratively, the corrected reference blood vessel image is adjacent to the blood vessel image to be corrected, and the imaging position of the corrected reference blood vessel image includes two blood vessel cross-sectional images corresponding to the adjacent two development mark member setting positions; it will be appreciated that the position of the imaging member rotation is at a position before the first imaging member, at which point the marker pixel information is not included in the blood vessel image to be corrected at the imaging position of the corrected reference blood vessel image. The imaging position of the corrected reference blood vessel image is adjacent to the imaging position of the blood vessel image to be corrected, and the imaging position of the corrected reference blood vessel image includes a first development mark member setting position, and the corrected reference blood vessel image includes a blood vessel cross-section image corresponding to the first development mark member setting position.
Similarly, the position of the imaging component yarn rotating is at the position behind the last developing marking component, and the marking point pixel information is not included in the blood vessel image to be corrected at the imaging position of the blood vessel image. The corrected reference blood vessel image is adjacent to the blood vessel image to be corrected, and the imaging position of the corrected reference blood vessel image comprises the last development mark component setting position, and the corrected reference blood vessel image comprises a blood vessel section image corresponding to the last development mark component setting position.
In addition, the first and the last developing mark components can be directly arranged at two end positions of the sheath tube of the vascular imaging system, so that all the vascular positions corresponding to the vascular images to be corrected without the mark points are positioned at the vascular positions between the two developing mark components, namely, each vascular image to be corrected without the mark point pixel position information has a corrected reference vascular image.
S260, correcting the blood vessel image to be corrected based on the offset information of the mark points in the corrected reference blood vessel image to obtain a target blood vessel image.
Firstly, extracting actual mark point pixel position information of mark points in a corrected reference blood vessel image, and determining offset information of each mark point in the corrected reference image according to the actual mark point pixel position information and the mark point reference pixel position information; then, determining the weight of each mark point offset information in the correction reference image according to the distance between the blood vessel position corresponding to the blood vessel image to be corrected and the blood vessel position corresponding to the correction reference image; and finally, correcting the blood vessel image to be corrected according to the offset information of each marking point in the correction reference image and the weight thereof to obtain a target blood vessel image.
When only one development marker is provided in the IVUS imaging system, each blood vessel image to be corrected, which does not contain marker pixel position information, is corrected according to the offset information of the marker in the corrected reference blood vessel image.
Optionally, a distance threshold may be further set, and when a distance between a blood vessel position corresponding to the blood vessel image to be corrected and a blood vessel position corresponding to the correction reference image is smaller than/equal to the distance threshold, the blood vessel image to be corrected is corrected based on offset information of the marker point in the correction reference blood vessel image. It will be appreciated that the distance between two adjacent developing marking members may be made less than/equal to the distance threshold when the developing marking members are disposed.
Further, when the correction reference blood vessel image includes a first correction reference blood vessel image acquired before the acquisition of the blood vessel image to be corrected and a second correction reference blood vessel image acquired after the acquisition of the blood vessel image to be corrected, correcting the blood vessel image to be corrected based on offset information of a mark point in the correction reference blood vessel image, including:
first, first offset information of each marker point in a first correction reference blood vessel image and second offset information of each marker point in a second correction reference blood vessel image are acquired.
Specifically, when the blood vessel position corresponding to the correction reference blood vessel image is between the blood vessel positions corresponding to the two development mark members, the blood vessel cross-section image corresponding to the development mark member setting position where the imaging member passes before is taken as a first correction reference blood vessel image, and the blood vessel cross-section image corresponding to the development mark member setting position where the imaging member passes after is taken as a second correction reference blood vessel image, according to the movement direction of the imaging member.
Determining offset information of each mark point in the first correction reference blood vessel as first offset information according to actual mark point pixel position information and mark point reference pixel position information of each mark point in the first correction reference blood vessel image; and determining offset information of each mark point in the second correction reference blood vessel as second offset information according to the actual mark point pixel position information and the mark point reference pixel position information of each mark point in the second correction reference blood vessel image.
Then, according to the distances between the blood vessel positions corresponding to the blood vessel images to be corrected and the blood vessel positions corresponding to the first correction reference blood vessel image and the second correction reference blood vessel image, weight values of the first offset information and the second offset information are determined.
Specifically, determining a distance between a blood vessel section position corresponding to a blood vessel image to be corrected and a blood vessel section position corresponding to a first correction reference blood vessel image as a first distance; meanwhile, determining the distance between the blood vessel section position corresponding to the blood vessel image to be corrected and the blood vessel section position corresponding to the second correction reference blood vessel image as a second distance; secondly, determining the distance sum value of the first distance and the second distance, namely the distance between two adjacent developing mark components at the position of the blood vessel section corresponding to the blood vessel image to be corrected; then, the ratio of the first distance to the distance and the value is used as a weight value of the first offset information, and the ratio of the second distance to the distance and the value is used as a weight value of the second offset information.
And finally, determining target offset information based on the first offset information, the second offset information and the weight value, and correcting the blood vessel image to be corrected based on the target offset information.
Specifically, the sum value of the offset information multiplied by the corresponding weight value is used as target offset information of the blood vessel image to be corrected, namely, the first offset information is multiplied by the weight value of the first offset information to be used as first initial offset information, the second offset information is multiplied by the weight value of the second offset information to be used as second initial offset information, and then the first initial offset information and the second initial offset information are added to obtain target offset information; and finally, correcting the blood vessel image to be corrected according to the target offset information in the corrected reference blood vessel image to obtain a target blood vessel image.
In a specific embodiment, according to first frame data of a corresponding blood vessel section image obtained during rotation of the rotating wire, a first marking point closest to the first frame data in the first correction reference blood vessel image and a first starting point of the blood vessel image to be corrected in the second correction reference blood vessel image for blood vessel image correction are respectively determined; taking the difference value between the central angle of the actual fan-shaped area of the first mark point in the first correction reference blood vessel image and the central angle of the reference fan-shaped area as the first offset information of the starting point; meanwhile, taking the difference value between the central angle of the actual sector area of the first mark point in the second correction reference blood vessel image and the central angle of the reference sector area as the second offset information of the starting point; then, respectively determining the weight values of the first offset information of the starting point and the second offset information of the starting point according to the distances between the blood vessel positions corresponding to the blood vessel images to be corrected and the blood vessel positions corresponding to the first correction reference blood vessel image and the second correction reference blood vessel image; and taking the weighted sum of the first offset information of the starting point and the second offset information of the starting point as starting point target offset information, if the target offset information of the starting point is not 0, determining the difference value of the central angle of the starting point target offset information and the central angle corresponding to the reference sector area, determining the sector area corresponding to the difference value from the starting point as the first actual sector area at the starting point in the blood vessel image to be corrected, and adjusting the central angle of the actual sector area to be the central angle of the reference sector area. Then, determining target offset information corresponding to a sector area adjacent to the first actual sector area in the blood vessel image to be corrected according to the mark point offset information of the actual sector areas of the second mark points in the first correction reference image and the second correction reference image, and correcting the first actual sector area in the blood vessel image to be corrected according to the target offset information; and by analogy, correcting all sector areas in the blood vessel image to be corrected according to the offset information of all the mark points in the corrected reference blood vessel image, so as to obtain the target blood vessel image.
According to the technical scheme, a blood vessel image to be corrected is obtained, and whether a group of mark points are contained in the blood vessel image to be corrected is determined; when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected; determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information; and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image. And when the blood vessel image to be corrected does not contain the mark point pixel information, acquiring a corrected reference blood vessel image adjacent to the blood vessel image to be corrected, namely containing the mark point pixel information, and correcting the blood vessel image to be corrected based on the offset information of the mark point in the corrected reference blood vessel image to obtain a target blood vessel image. According to the technical scheme, the problem of blood vessel image distortion caused by uneven rotation of the rotating wire is solved, and the accuracy of blood vessel morphology in the blood vessel image is further improved.
Fig. 9 is a block diagram of a blood vessel image correction device according to an embodiment of the present invention, where the embodiment is applicable to a scenario in which an intravascular ultrasound imaging system provided with marker pixel information performs blood vessel image correction, and the device may be implemented in software and/or hardware, and integrated into a blood vessel image correction system with an application development function.
As shown in fig. 9, the blood vessel image correction device includes: a blood vessel image acquisition module 401, a marker pixel position information extraction module 402, a marker offset information determination module 403, and a blood vessel image correction module 404.
The blood vessel image obtaining module 401 is configured to obtain a blood vessel image to be corrected, and determine whether the blood vessel image to be corrected contains a group of marker points; a marker pixel position information extraction module 402, configured to extract actual marker pixel position information of a set of markers in the blood vessel image to be corrected when the blood vessel image to be corrected contains the set of markers; a marker offset information determining module 403, configured to determine offset information of each marker based on the actual marker pixel position information and the marker reference pixel position information; the blood vessel image correction module 404 is configured to correct the blood vessel image to be corrected according to the offset information, so as to obtain a target blood vessel image.
According to the technical scheme, a blood vessel image to be corrected is obtained, and whether a group of mark points are contained in the blood vessel image to be corrected is determined; when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected; determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information; and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image. According to the technical scheme, the problem of blood vessel image distortion caused by uneven rotation of the rotating wire is solved, and the accuracy of blood vessel morphology in the blood vessel image is improved.
Optionally, the blood vessel image acquisition module is further configured to: and acquiring a blood vessel image to be corrected through an ultrasonic catheter, wherein a developing and marking component is arranged on the sheath wall of the ultrasonic catheter, and the developing and marking component enables pixel information of a group of marking points to be displayed at the position corresponding to the developing and marking component in the blood vessel image to be corrected.
Optionally, the marker offset information determining module 403 is further configured to:
dividing an actual sector area corresponding to each marking point in the blood vessel image to be corrected based on the pixel position information of the actual marking point;
dividing a reference sector area corresponding to each marking point in the marking point reference image based on marking point reference pixel position information;
and determining the offset information of each marking point according to the actual sector area and the reference sector area.
Optionally, the marker offset information determining module 403 further includes a fan-shaped region central angle adjustment unit, where the fan-shaped region central angle adjustment unit is specifically configured to: and adjusting the central angles of the corresponding actual fan-shaped areas according to the offset information to obtain the target blood vessel image.
Optionally, the blood vessel image correction device further includes a corrected reference blood vessel image acquisition module for:
Acquiring a correction reference blood vessel image adjacent to the blood vessel image to be corrected, wherein the correction reference blood vessel image comprises mark point pixel information;
and correcting the blood vessel image to be corrected based on the offset information of the mark points in the corrected reference blood vessel image.
Optionally, the corrected reference blood vessel image acquisition module includes a corrected reference blood vessel image offset determination unit for:
acquiring first offset information of each mark point in the first correction reference blood vessel image and second offset information of each mark point in the second correction reference blood vessel image;
determining a weight value of the first offset information and the second offset information according to the distance between the blood vessel position corresponding to the blood vessel image to be corrected and the blood vessel positions corresponding to the first correction reference blood vessel image and the second correction reference blood vessel image;
target offset information is determined based on the first offset information, the second offset information and the weight value, and the blood vessel image to be corrected is corrected based on the target offset information.
The blood vessel image correction device provided by the embodiment of the invention can execute the blood vessel image correction method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 10 is a block diagram of a vascular image correction system according to an embodiment of the present invention, which is applicable to a scenario in which marker pixel information is set for vascular image correction, and the system may be implemented in software and/or hardware.
The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 10, the blood vessel image correction system 10 includes: an ultrasound catheter 501 for acquiring a blood vessel image; at least one development mark member 502 for developing pixel information of a set of mark points in the blood vessel image corresponding to the setting position of the development mark member; at least one processor 11, and a memory communicatively coupled to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like.
In a specific embodiment, the development mark member 502 is a development ring (see fig. 2) or a filament made of a metallic material. Wherein, the filament can be arranged on the inner wall of the sheath tube of the ultrasonic catheter 501, the filament can not excessively shade the blood vessel image of the imaging component at the position corresponding to the blood vessel section, and the acoustic wave reflectivity of the metal material is stronger, so that the imaging definition of the marked point is ensured. Illustratively, when the sheath is manufactured, 24 metal wires are uniformly embedded in the sheath, so that the imaging component always comprises a group of mark points in the blood vessel image to be corrected, which is obtained in the rotating and withdrawing process. Further, the blood vessel image to be corrected is corrected based on the offset information of the mark points, and a target blood vessel image is obtained.
In which a memory stores a computer program executable by at least one processor, the processor 11 may perform various suitable actions and processes according to the computer program stored in a Read Only Memory (ROM) 12 or the computer program loaded from a storage unit 18 into a Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the blood vessel image correction system 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the vascular image correction system 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the blood vessel image correction system 10 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the respective methods and processes described above, such as a blood vessel image correction method.
In some embodiments, the vessel image correction method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the vascular image correction system 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the blood vessel image correction method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the vessel image correction method by any other suitable means (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
According to the technical scheme, the blood vessel image to be corrected is obtained, and whether the blood vessel image to be corrected contains a group of mark points or not is determined; when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected; determining offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information; and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image. According to the technical scheme provided by the embodiment of the invention, the problem of blood vessel image distortion caused by uneven rotation of the rotating wire is solved, and the accuracy of blood vessel morphology in the blood vessel image is improved.
The blood vessel image correction system provided by the embodiment of the invention can execute the blood vessel image correction method provided by any embodiment of the invention, and has the corresponding beneficial effects of the execution method.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the apparatus and techniques described herein may be implemented on a vascular image correction system having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or a trackball) through which a user can provide input to the vascular image correction system. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (11)
1. A method of vessel image correction, the method comprising:
acquiring a blood vessel image to be corrected, and determining whether the blood vessel image to be corrected contains a group of mark points;
when the blood vessel image to be corrected contains a group of mark points, extracting the actual mark point pixel position information of the group of mark points in the blood vessel image to be corrected;
determining offset information of each marking point based on the actual marking point pixel position information and marking point reference pixel position information;
and correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image.
2. The method of claim 1, wherein the acquiring a blood vessel image to be corrected comprises:
and acquiring the blood vessel image to be corrected through an ultrasonic catheter, wherein a developing and marking component is arranged on the sheath wall of the ultrasonic catheter, and the developing and marking component enables the position corresponding to the developing and marking component in the blood vessel image to be corrected to present the pixel information of the group of marking points.
3. The method of claim 1, wherein the determining offset information for each marker point based on the actual marker point pixel location information and marker point reference pixel location information comprises:
Dividing an actual sector area corresponding to each marking point in the blood vessel image to be corrected based on the pixel position information of the actual marking point;
dividing a reference sector area corresponding to each marking point in the marking point reference image based on the marking point reference pixel position information;
and determining offset information of each marking point according to the actual sector area and the reference sector area.
4. A method according to claim 3, wherein said correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image comprises:
and adjusting the central angles of the corresponding actual fan-shaped areas according to the offset information to obtain a target blood vessel image.
5. The method according to claim 1, wherein when no marker pixel information is contained in the blood vessel image to be corrected, the method further comprises:
acquiring a corrected reference blood vessel image adjacent to the blood vessel image to be corrected, wherein the corrected reference blood vessel image comprises mark point pixel information;
and correcting the blood vessel image to be corrected based on the offset information of the mark points in the corrected reference blood vessel image.
6. The method of claim 5, wherein when the corrected reference vessel image includes a first corrected reference vessel image acquired before the blood vessel image to be corrected is acquired and a second corrected reference vessel image acquired after the blood vessel image to be corrected is acquired, the correcting the blood vessel image to be corrected based on offset information of a marker point in the corrected reference vessel image includes:
Acquiring first offset information of each mark point in the first correction reference blood vessel image and second offset information of each mark point in the second correction reference blood vessel image;
determining weight values of the first offset information and the second offset information according to the distances between the blood vessel positions corresponding to the blood vessel images to be corrected and the blood vessel positions corresponding to the first correction reference blood vessel image and the second correction reference blood vessel image;
and determining target offset information based on the first offset information, the second offset information and the weight value, and correcting the blood vessel image to be corrected based on the target offset information.
7. A blood vessel image correction device, comprising:
the blood vessel image acquisition module is used for acquiring a blood vessel image to be corrected and determining whether the blood vessel image to be corrected contains a group of mark points or not;
the mark point pixel position information extraction module is used for extracting the actual mark point pixel position information of a group of mark points in the blood vessel image to be corrected when the blood vessel image to be corrected contains the group of mark points;
the mark point offset information determining module is used for determining the offset information of each mark point based on the actual mark point pixel position information and the mark point reference pixel position information;
And the blood vessel image correction module is used for correcting the blood vessel image to be corrected according to the offset information to obtain a target blood vessel image.
8. The apparatus of claim 7, wherein the vessel image acquisition module is to:
and acquiring the blood vessel image to be corrected through an ultrasonic catheter, wherein a developing and marking component is arranged on the sheath wall of the ultrasonic catheter, and the developing and marking component enables the position corresponding to the developing and marking component in the blood vessel image to be corrected to present the pixel information of the group of marking points.
9. A vascular image correction system, the system comprising:
the ultrasonic catheter is used for acquiring a blood vessel image to be corrected;
at least one developing mark component which is arranged on the sheath wall of the ultrasonic catheter and can enable the position of the blood vessel image to be corrected, which corresponds to the developing mark component, to present pixel information of a group of mark points;
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the vessel image correction method of any one of claims 1-6.
10. The system of claim 9, wherein the development marking element is a development ring or a filament of metallic material.
11. A computer readable storage medium storing computer instructions for causing a processor to perform the vessel image correction method according to any one of claims 1-6.
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