Method and system for adjusting SID distance, and X-ray imaging inspection system

Abstract

The present disclosure relates to a method, system, and X-ray imaging system for adjusting the SID distance. The method comprises the following steps: obtaining at least body geometry information about a projection of an object under examination, and / or measuring positional information of the object under examination relative to an X-ray source; comparing the contour information and / or the positional information with a reference first human body model to obtain a scaling relationship; scaling the SID distance associated with the reference first human body model based on the scaling relationship to obtain a corrected SID distance; and adjusting the position of the X-ray source based on the corrected SID distance and positional information about the imaging site relative to the X-ray source. This method provides a method for adjusting the SID distance by obtaining the distribution of human organs, tissues, or limbs based on the object's body geometry information, thereby intelligently adjusting the distance from the X-ray source to the object under examination, thereby optimizing the efficiency of X-ray medical imaging examinations.

Description

Technical Field

[0001] The present invention relates to an X-ray machine in the technical field of medical equipment, and in particular to a technology capable of automatically adjusting a shooting position during an X-ray inspection. Background Art

[0002] When performing X-ray examinations on patients today, medical technicians often need to manually adjust the angle and distance of the X-ray generator / source based on the location of different internal organs to achieve optimal imaging results. However, adjusting the X-ray generator angle and distance in the X-ray machine relies on the medical technician's experience and often requires repeated adjustments to the imaging position angle and SID (Source-to-Image Receptor Distance), making this operation cumbersome and inefficient. Therefore, there is a need for a solution or product that can intelligently adjust the SID distance between the X-ray generator / source and the patient or detector. Summary of the Invention

[0003] In view of this, the present disclosure proposes, on one hand, a method for adjusting the SID distance, so as to adaptively adjust the distance from an X-ray generating source for emitting X-rays to the inspection object based on parameters such as the body posture of the inspection object, the method comprising the following steps: obtaining at least body geometry information about the inspection object, and measuring first position information of the inspection object relative to the X-ray generating source; obtaining a reference first human body model, wherein the first human body model and the human body parts and / or organ parts included therein are respectively associated with at least one first distance suitable for photographing from the X-ray generating source to the first human body model and the human body parts and / or organ parts included therein; and adjusting the distance based on at least the first human body model and the human body parts and / or organ parts included therein. The body geometry information and the first position information are used to map the first human body model to obtain a corresponding second human body model, and a first scaling relationship exists between the second human body model and the first human body model; the first scaling relationship is associated with the direction from the inspection object to the X-ray source to correct the first distance to obtain a corresponding second distance to which the X-ray source needs to be adjusted; the position of the X-ray source is adjusted based on the second distance and the emission angle of the X-ray source determined by the second position information of the human body part and / or organ part of the inspection object as the shooting target relative to the X-ray source.

[0004] Optionally, the first human body model for reference is obtained, and the first human body model and the human body parts and / or organ parts included therein are associated with at least one first distance suitable for shooting represented as an X-ray source to each of the first human body models, including: the first human body model for reference is obtained and a plurality of first image segmentations are provided therein to correspond to each human body part and / or organ part, and each of the human body part and / or organ part is respectively associated with at least one first distance.

[0005] Optionally, mapping the first human body model based on at least the body geometry information and the first position information to obtain a corresponding second human body model, and the second human body model having a first scaling relationship with the first human body model includes: mapping one or more of the first image segmentations based on at least the body geometry information and the first position information to obtain corresponding second image segmentations, and the second image segmentations have a first scaling relationship with the first image segmentations of the corresponding parts, wherein multiple second image segmentations are associated with human body parts and / or organ parts of the examination object.

[0006] Optionally, the correcting one or more of the first image segments based on at least the contour information and the first position information to obtain corresponding second image segments includes: obtaining the gravity distribution of the inspection object; calculating the center of gravity position of one or more second image segments based on the gravity distribution, and correcting the second image segmentation using the center of gravity position.

[0007] Optionally, acquiring the gravity distribution of the inspection object includes measuring the gravity distribution of the inspection object when the inspection object is carried on a scanning bed.

[0008] Optionally, the emission angle of the X-ray source is determined based on the second distance and the second position information of the human body part and / or organ part of the examination object as the shooting target relative to the X-ray source, and adjusting the position of the X-ray source includes: associating the human body parts and / or organ parts corresponding to multiple second image segmentations with multiple controls provided by an interactive interface; when at least one of the controls is triggered, obtaining the second position information of the human body part and / or organ part of the examination object associated with the control relative to the X-ray source to determine the second distance and emission angle to which the X-ray source needs to be adjusted; adjusting the position of the X-ray source based on the second distance and emission angle so that the X-ray source emits X-rays to the associated human body part and / or organ part of the examination object.

[0009] Optionally, the body geometry information includes at least contour information of a projection of the inspection object, and / or a set of multiple feature points reflecting body parameters.

[0010] Optionally, the gravity distribution comprises a distribution diagram represented as a heat map.

[0011] Another aspect of the present disclosure provides a system for adjusting the SID distance, for adjusting a suitable distance from an X-ray source to an object under examination, comprising: a first sensing unit configured to obtain at least body geometry information about the object under examination, and measure first position information of the object under examination relative to the X-ray source and second position information of a human body part and / or organ part of the object under examination as a photographing target relative to the X-ray source; a calculating unit configured to obtain a first human body model as a reference, wherein the first human body model and the human body parts and / or organ parts included therein are associated with at least one first distance suitable for photographing from the X-ray emission source to the first human body model and the human body parts and / or organ parts included therein, and the calculating unit comprises: a mapping unit , configured to map the first human body model based on at least body geometry information and the first position information to obtain a corresponding second human body model, the second human body model has a first scaling relationship with the first human body model, the calculation unit is further configured to associate the first scaling relationship with the direction from the inspection object to the X-ray source to correct the first distance to obtain the corresponding second distance to which the X-ray source needs to be adjusted; and a position adjustment unit, configured to be mechanically coupled to the X-ray source, and further configured to be associated with the calculation unit, so that the position adjustment unit adjusts the position of the X-ray source based on the second distance and the emission angle of the X-ray source determined by the second position information.

[0012] Optionally, the calculation unit of the SID distance adjustment system is configured to obtain the first human body model and multiple first image segmentations corresponding to each human body part and / or organ part provided by it, and each of the human body part and / or organ part is respectively associated with at least one first distance; and the mapping unit is configured to map one or more of the first image segmentations based on body geometry information and the first position information to obtain a corresponding second image segmentation, and a first scaling relationship between the second image segmentation and the first image segmentation of the corresponding part, and the calculation unit is configured to correct the associated first distance based on at least one of the first scaling relationships to obtain the second distance to which the X-ray source associated with the human body part and / or organ part needs to be adjusted.

[0013] Optionally, the SID distance adjustment system further includes: a second sensing unit, the second sensing unit including a plurality of pressure sensors, which are arranged along a bed plate of a scanning bed, so that when the inspection object is carried on the scanning bed, under the action of gravity, the pressure sensors sense the gravity distribution of the inspection object.

[0014] Optionally, the calculation unit of the system for adjusting the SID distance is configured to calculate the center of gravity position of one or more second image segments based on the gravity distribution, and correct the second image segments using the center of gravity position.

[0015] Optionally, the calculation unit of the SID distance adjustment system is associated with an interactive interface and configured to associate multiple triggerable controls provided on the interactive interface with the human body parts and / or organ parts corresponding to the multiple second image segmentations, so that when the controls are triggered, the calculation unit determines the second distance and emission angle that need to be adjusted based on the second position information of the human body parts and / or organ parts of the inspection object associated with the controls relative to the X-ray source; the calculation unit is associated with the position adjustment unit, so that the position adjustment unit adjusts the position of the X-ray source based on the second distance and emission angle, so that the X-ray source emits X-rays to the associated human body parts and / or organ parts.

[0016] Optionally, the first sensing part of the SID distance adjustment system includes a depth camera associated with the position of the X-ray source to obtain the first position information and / or the second position information, or the first sensor includes a camera for obtaining the body geometry information of the inspection object and a ranging sensor for measuring the first position information and / or the second position information, and at least the ranging sensor is associated with the position of the X-ray source.

[0017] Optionally, the body geometry information of the system for adjusting the SID distance includes at least contour information of a projection of the inspection object, and / or a set of multiple feature points reflecting body parameters.

[0018] Another aspect of the present invention provides an X-ray imaging inspection system, comprising: an X-ray generating source for emitting X-rays; a bed for carrying an inspection object, so that the X-ray generating source can emit X-rays toward the inspection object when the inspection object is carried on the bed to perform medical imaging; and the SID distance adjustment system as described above, the SID distance adjustment system comprising a position adjustment unit configured to adjust the X-ray generating source to a position suitable for imaging based on at least the body adaptability of the inspection object.

[0019] One advantage of the method for adjusting the SID distance provided by the present disclosure is that an adaptive SID distance can be obtained by scaling and calibrating the SID distance associated with a human body model used as a reference by measuring the body geometry information and gravity distribution of the current examination object, and adjusting the position of the current X-ray source based on the current SID distance and the emission angle obtained based on the position information between the shooting target and the X-ray source, thereby achieving adaptive modulation of the SID distance according to the body geometry information and parameters of the current examination object, thereby improving the efficiency of X-ray medical imaging examinations.

[0020] Another advantage is that after obtaining a human body model based on the body posture information and parameters of the current examination object, and obtaining the segmentation information of each human body part and organ part based on the image segmentation of a known reference human body model, the current human body model is subjected to corresponding image segmentation, that is, multiple original image segmentations are mapped based on, for example, a scaling factor or scaling ratio to obtain current image segmentation, and the corresponding multiple SID distances and angles are automatically adjusted based on the size of each part of the previous image segmentation and the position information or relative position relative to the X-ray source, thereby eliminating the need to repeatedly manually adjust the SID distance in the process of photographing multiple parts or organs of an examination object, further improving the efficiency and intelligence of X-ray medical imaging examinations.

[0021] Another advantage is that it provides a plurality of human body parts and organ parts associated with a control of an interface, so that when the corresponding control is triggered, the SID distance and emission angle of the X-ray source can be automatically adjusted based on the above method and structure in response to the triggering of the control, thereby facilitating X-ray medical imaging examinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings so that those skilled in the art can better understand the above and other features and advantages of the present disclosure. In the accompanying drawings:

[0023] Figure 1 1 is a flow chart illustrating a method for adjusting the SID distance based on a scaling relationship obtained for a reference human body model according to an exemplary embodiment;

[0024] Figure 2 A flowchart illustrating a method for adjusting SID distances for image segmentation of human body parts and / or organ parts based on a reference human body model according to another exemplary embodiment;

[0025] Figure 3 A flowchart illustrating a method for correcting image segmentation of a human body part and / or an organ part based on the gravity distribution of an examination object according to another exemplary embodiment;

[0026] Figure 4 A flowchart illustrating a method for associating various body parts and / or organ parts of an examination subject with interface selection according to an exemplary embodiment;

[0027] Figure 5 Schematic diagram showing the functional structure of a system for adjusting SID distance according to an exemplary embodiment;

[0028] Figure 6 1 is a schematic diagram showing a bed plate of a scanning bed and a bed plate with pressure sensors arranged thereon in the AA direction according to an exemplary embodiment;

[0029] Figure 7 A schematic diagram illustrating an interactive interface for selecting a human body part and / or an organ part as a photographing object according to an exemplary embodiment;

[0030] Figure 8 FIG. 1 is a schematic structural diagram illustrating an X-ray imaging inspection system according to an exemplary embodiment.

[0031] The accompanying drawings are numerals as follows:

[0032] 100 X-ray imaging inspection system

[0033] 102 X-ray source

[0034] 104 Scanning Bed

[0035] 1042 bed board

[0036] 106 detectors

[0037] 200 Adjust SID distance system

[0038] 202 First sensor unit

[0039] 2022 Depth Camera

[0040] 204 Computing Department

[0041] 2042 Mapping Department

[0042] 206 Second Sensor Unit

[0043] 2062 Pressure Sensor

[0044] 208 Position Adjustment Unit

[0045] 210 Display

[0046] 212 Interactive Interface

[0047] 2122 Controls DETAILED DESCRIPTION

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0049] In this document, “illustrative” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “illustrative” should not be interpreted as a more preferred or more advantageous technical solution.

[0050] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled.

[0051] In this article, "one" not only means "only one" but also "more than one". In this article, "first", "second", etc. are only used to distinguish one from another, and do not indicate their importance or order, or the premise of each other.

[0052] An X-ray generating source may include: an X-ray generator, which may include at least a cathode and an anode assembly, wherein the cathode generates high-energy electrons under the action of a high voltage from a high-voltage generator and bombards an anode target disk of the anode assembly, and the anode target disk further generates X-rays under the bombardment of the high-energy electrons and emits them through a window of the X-ray generator; and a beam splitter, which is used to adjust the angular range of the X-rays emitted from the X-ray generator.

[0053] The source-to-image distance (SID) is used to measure the distance from the emission focus of the X-ray source to the X-ray detector. X-ray medical imaging examinations are based on collecting images in a projection direction. The quality of images in X-ray examinations often depends on reducing image distortion in X-ray medical imaging examinations. Usually, the size of the inspection object in the projection direction needs to be considered when setting the SID distance. Taking into account the differences in the body shape of the inspection object, the SID distance needs to be adjusted when implementing X-ray medical imaging examinations. Therefore, when examining multiple organs of the same inspection object, it is necessary to manually adjust the SID distance and angle repeatedly in order to shoot different parts, tissues or limbs, which reduces work efficiency. In addition, the SID distance can be used to easily calculate the corresponding distance from the X-ray source to an inspection object or its shooting part.

[0054] The present disclosure provides a method for adjusting the SID distance to adaptively and automatically adjust the distance between an X-ray source emitting X-rays and the subject based on parameters such as the subject's posture. The method for adjusting the SID distance in the present disclosure is described below with reference to the accompanying drawings.

[0055] refer to Figure 1 , shows a flow chart of a method for adjusting the SID distance. This method detects the subject's body parameters and compares them with those of a standard human body. Furthermore, by obtaining the subject's gravity distribution, the position and size of the subject's organs and body parts are further corrected, allowing for more accurate and adaptive adjustment of the SID distance and X-ray emission angle. The method comprises the following steps:

[0056] In step S110 , at least body geometry information about the examination object P is acquired, and first position information of the examination object P relative to the X-ray generating source is measured.

[0057] Here, the body geometry information includes at least a projection contour information of the inspection object P, and / or a set of multiple feature points reflecting body parameters. In an illustrated embodiment, for example, the projection contour information of the inspection object relative to the direction of the camera can be obtained by a camera arranged around the X-ray source, and the relative position of the inspection object and the X-ray source can be obtained using a ranging sensor. In addition, if a depth camera (or 3D camera) is used, the first position information (including three-dimensional coordinates, i.e., X, Y and Z axis coordinate positions) and contour information of the inspection object can be obtained at the same time. The first position information can represent the coordinate information, contour information, etc. of the surface of the current inspection object. In addition, for the convenience of processing, the first position information can be unified into a coordinate system centered on the X-ray source.

[0058] In step S120, a reference first human body model is obtained, and the first human body model and the human body parts and / or organ parts included therein are respectively associated with at least one first distance suitable for shooting represented as an X-ray source to each first human body model and the human body parts and / or organ parts included therein.

[0059] In one illustrated embodiment, a reference first human body model can include body geometry information obtained by collecting projection profile information of a known reference object and measuring its positional information relative to an X-ray source used for imaging. This profile and positional information is then stored. During the acquisition process, this information can be naturally associated with a suitable imaging distance, which can be simply converted into a SID distance to obtain the profile information of the reference object's projection in a certain direction at this relative position. Alternatively, a standard first human body model can be obtained as a reference. This standard first human body model can be based on statistically derived body parameters and corresponding suitable distances or SID distances. It will be readily understood that the reference first human body model, the body parts and organ parts included therein, and the first distances associated therewith can be stored and queried in a memory.

[0060] In step S130 , the first human body model is mapped based on the body geometry information of the current examination object and the first position information to obtain a corresponding second human body model, and the second human body model has a first scaling relationship with the first human body model.

[0061] In an illustrated embodiment, for example, the contour information and the first position information based on the projection of the current inspection object are further mapped to the environmental conditions for obtaining the first human body model, that is, a second human body model is obtained under the same position distance conditions and / or the same projection angle, thereby obtaining a first scaling relationship between the second human body model and the first human body model. The first scaling relationship can be a scaling factor, and is not limited to an isotropic scaling factor or a non-isotropic scaling factor, that is, a scaling ratio that is adaptive in different directions according to actual conditions to obtain a better fit.

[0062] In step S140, the first distance is corrected by associating the first scaling relationship with the direction from the inspection object to the X-ray source to obtain a second distance to which the X-ray source needs to be adjusted;

[0063] In an illustrated embodiment, the second distance obtained after the first distance is corrected accordingly based on the first scaling relationship is the distance from the X-ray source to the examination object that is adaptively adjusted according to the body shape of different examination objects. The second distance obtained after the first distance is corrected accordingly can, for example, make the second human body model reflecting the body shape of the examination object or the outline or a set of multiple geometric feature points corresponding to the projection of its human body part and / or organ part fit the first human body model or its corresponding human body part and / or organ part. In addition, the projection angle that needs to be adjusted when further fitting the second distance can also be considered based on the first position information and / or the second position information.

[0064] In an illustrated embodiment, the first distance is corrected by associating the first scaling relationship with the direction from the inspection object to the X-ray source. For example, the first scaling relationship can be associated with the corresponding scaling ratio between the second distance, which is the position to which the X-ray source needs to be adjusted, and the first distance. That is, if the first scaling relationship is known, it is easy to convert the scaling ratio of the first distance that needs to be adjusted through geometric relationships or geometric ratios. In addition, the corresponding scaling ratio between the second distance and the first distance can be obtained by performing weighted calculations or average calculations in each direction based on the first scaling relationship using different scaling factors in each direction. In addition, when using the first scaling relationship to perform scaling correction on the first distance, it is also necessary to consider the geometric shape of the X-rays emitted by the X-ray source, such as fan-shaped or cone-shaped X-rays, and further consider the limitations of the beam emitter on the X-ray emission, etc.

[0065] In step S150, the position of the X-ray source is adjusted based on the emission angle of the X-ray source determined by the second distance and the second position information of the human body part and / or organ part of the inspection object P as the shooting target relative to the X-ray source.

[0066] Here, the second position information regarding a body part and / or organ part of the examination subject P relative to the X-ray source can be easily obtained from the first position information as local position information. However, it is necessary to consider determining appropriate boundaries for each body part and / or organ part of the examination subject P, or to distinguish them based on image segmentation.

[0067] refer to Figure 2 , shows another method for adjusting the SID distance, which is intended to provide the position and boundary of each human body part and / or organ part for the inspection object P to distinguish, thereby adjusting the appropriate shooting distance and emission angle between the X-ray generating source and a specific human body part and / or organ part as the shooting part, wherein steps S210 and steps S240 to S250 correspond to Figure 1 Steps S110 and S140 to S150 described in detail are not repeated here.

[0068] Steps S220 to 230 are intended to provide image segmentation of various human body parts and / or organ parts of the inspection object P as position and boundary identifications to obtain multiple shooting parts, and to correct the above-mentioned first distance based on the geometric information of the local position to obtain the second distance and emission angle to which the X-ray source needs to be adjusted.

[0069] In step S220 , a reference first human body model is obtained and a plurality of first image segmentations are provided to correspond to various human body parts and / or organ parts, and each human body part and / or organ part is respectively associated with at least one first distance.

[0070] Here, a plurality of known first image segmentations regarding various human body parts and / or organ parts provided by a reference first human body model are used.

[0071] In step S230, one or more first image segments are mapped based on the body geometry information of the examination object P and the first position information to obtain corresponding second image segments.

[0072] In an illustrated embodiment, the above-mentioned method of mapping the first human body model to the second human body model can be used to further map the known first image segmentation of each human body part and / or organ part to the second image segmentation of the corresponding part under the assumed same measurement environment conditions, and the second human body model is composed of the obtained second image segmentation. It can be understood that there is a first scaling relationship between the second image segmentation and the first image segmentation of the corresponding part, wherein the multiple second image segmentations are associated with the human body part and / or organ part of the inspection object P. Here, the first scaling relationship between the second image segmentation and the first image segmentation of its corresponding part can be used to further correspond to the first distance, thereby obtaining a set of second distances to which the X-ray source needs to be adjusted. This provides a method of obtaining the second distance and emission angle to which the corresponding X-ray source needs to be adjusted after selecting a local imaging object.

[0073] refer to Figure 3 , shows a method for correcting image segmentation of human body parts and / or organ parts based on the gravity distribution of the examination object, aiming to further provide more accurate image segmentation of local human body parts and / or organ parts of the examination object P. For example, the image segmentation is based on the center of gravity position of the human body part and / or organ part as the imaging target and the starting point from the body part to the X-ray source is selected. The image segmentation correction method includes the following steps:

[0074] In step S310 , the gravity distribution of the inspection object P is acquired.

[0075] In an illustrated embodiment, the gravity distribution of the examination subject P is measured while the examination subject P is supported on a scanning bed. It should be noted that multiple pressure sensors, for example, can be arranged in the direction of gravity exerted by the examination subject P to collect the gravity distribution of the examination subject P. For example, the gravity distribution of the examination subject P can also be collected when the examination subject P is standing.

[0076] In step S320, the center of gravity positions of one or more second image segments are calculated based on the gravity distribution, and the second image segments are corrected using the center of gravity positions.

[0077] In an illustrated embodiment, for example, when selecting a human body part and / or organ part of the examination subject as the starting point of the imaging target relative to the X-ray source, the geometric center or area of ​​the human body part and / or organ part can be considered to calculate the position between the human body part and / or organ part and the X-ray source. In addition, the geometric center cannot accurately reflect the material distribution of the human body part and / or organ part. For this reason, the center of gravity position of the human body part and / or organ part can be further considered, and the gravity distribution can be used to provide a weight coefficient for calculating the center of gravity position, so that one or more second image segmentations involved can be further corrected to obtain a more accurate image segmentation of a human body part and / or organ part of the examination subject, so that the position of the X-ray source, including the emission angle, can be adjusted more accurately.

[0078] In an illustrated embodiment, the gravity distribution includes being represented as a heat map distribution graph, that is, the gravity distribution is represented as a heat map distribution graph.

[0079] In step S330 , the first distance is corrected based on a second scaling relationship between the second image segmentation and the first image segmentation of the corresponding part.

[0080] Here, the second scaling relationship is further used to correct at least one first distance, and a more accurate emission angle is obtained based on the relative position information of the center of gravity and the X-ray source. Furthermore, the method for correcting the first distance based on the second scaling relationship to obtain the second distance to be adjusted for the X-ray source can be referred to above and will not be repeated here.

[0081] refer to Figure 4 , shows the process of associating a human body part and / or organ part with an (interactive) interface when selecting a body part and / or organ part as a photographic target, aiming to further improve the efficiency, process and experience of X-ray medical imaging examinations. The method of associating the photographic target with the interface includes the following steps:

[0082] In step S410, the human body parts and / or organ parts corresponding to the plurality of second image segmentations are associated with a plurality of controls provided by an interactive interface.

[0083] In an illustrated embodiment, a display may be used to provide an interactive interface.

[0084] In step S420, when at least one of the controls is triggered, second position information of the body part and / or organ part of the inspection object P associated with the control relative to the X-ray source is obtained to determine the second distance and emission angle to which the X-ray source needs to be adjusted.

[0085] In an illustrated embodiment, a control on an interactive interface can be selected by controlling a cursor, or a control on an interactive interface can be triggered by using a touch screen.

[0086] In step S430, the position of the X-ray source is adjusted based on the second distance and the emission angle, so that the X-ray source emits X-rays to the associated or selected human body part and / or organ part of the inspection object.

[0087] In step S440 , it is determined whether a control related to triggering another human body part and / or organ part is continuously received from the outside.

[0088] Another aspect of the present disclosure provides a system for adjusting the SID distance. This system can be associated with an X-ray imaging inspection system to adaptively adjust the distance from the X-ray source to the subject, or the SID distance, as well as the emission angle, based on the subject's posture and position information. The X-ray imaging inspection system provided by the present disclosure is described below with reference to the accompanying drawings.

[0089] refer to Figure 5As shown, a system 200 for adjusting the SID distance according to an illustrated embodiment includes: a first sensing unit 202, configured to obtain at least body geometry information about a projection of an examination object P, measure first position information of the examination object P relative to the X-ray source 102, and second position information of a body part and / or an organ part of the examination object P as a shooting target relative to the X-ray source 102; a calculating unit 204, configured to obtain a first human body model as a reference, the first human body model and the human body parts and / or organ parts included therein are associated with at least one first distance suitable for shooting represented as the X-ray emission source 102 to the first human body model, and the first distance can be simply converted into the SID distance for the first human body model. The calculating unit 204 includes: a mapping unit 2042, configured to map the first human body model based on at least the body geometry information and the first position information to obtain a corresponding second human body model, so that the second human body model has a first scaling relationship with the first human body model. Here, the mapping unit 2042 can map the body geometry information and the first position information to the same environmental scale as that used to obtain the first human body model, thereby obtaining a first scaling relationship between the second human body model and the first human body model. The calculation unit 204 is further configured to associate the first scaling relationship with the direction from the examination object P to the X-ray source 102 to correct the first distance, thereby obtaining a corresponding second distance to which the X-ray source 102 needs to be adjusted; and the position adjustment unit 208 is configured to be mechanically coupled to the X-ray source 102 and further configured to be associated with the calculation unit 204, so that the position adjustment unit 208 adjusts the position of the X-ray source 102 based on the second distance and the emission angle of the X-ray source 102 determined based on the second position information. In addition, the mechanical coupling between the position adjustment unit 208 and the X-ray source 102 can achieve control of the spatial translation and rotational degrees of freedom of the X-ray source 102.

[0090] Here, the body geometry information at least includes contour information of a projection of the inspection object P and / or a set of multiple feature points reflecting body parameters.

[0091] According to an exemplary embodiment, the SID distance adjustment system 200 is described with reference to Figure 8The first sensing unit 202 includes a depth camera 2022 (or a 3D camera). Installed next to the X-ray source 102 so as to be associated with the X-ray source, the depth camera 2022 can obtain information including the outline of the projection of the examination object P, first position information of the examination object P as a whole relative to the X-ray source 102, and / or second position information of a body part and / or organ part of the examination object P relative to the X-ray source 102. Furthermore, if only a conventional camera is used to obtain the outline of a projection of the examination object P, a distance sensor is also required to measure the first and / or second position information. Therefore, in another illustrated embodiment, the first sensing unit 202 may further include a conventional camera and a distance sensor, wherein the distance sensor is associated with the position of the X-ray source 102.

[0092] According to an embodiment of the present invention, the SID distance adjustment system 200 is designed to distinguish the positions and boundaries of various human body parts and / or organ parts of the inspection object P, thereby achieving the adjustment of the X-ray source 102 based on the local shooting target. The calculating unit 204 is configured to obtain the first human body model and the multiple first image segmentations corresponding to the human body parts and / or organ parts provided by the first human body model, for example, the calculating unit 204 can obtain the first human body model, that is, the multiple first image segmentations corresponding to the human body parts and / or organ parts provided by the first human body model, through a memory, wherein each human body part and / or organ part is respectively associated with at least one first distance; and the mapping unit 2042 is further configured to map one or more of the first image segmentations based on the body geometry information and the first position information of the examination object P to obtain a corresponding second image segmentation, so that the second image segmentation has a first scaling relationship with the first image segmentation of the corresponding part, and the calculating unit 204 is configured to correct the corresponding first distance based on the at least one first scaling relationship, that is, the first scaling relationship between the human body part and / or organ part represented by the second image segmentation of the corresponding part and the first image segmentation is used to scale the first distance corresponding to the human body part and / or organ part to correct the first distance, so as to obtain the second distance to which the X-ray generating source 102 associated with the human body part and / or organ part needs to be adjusted.

[0093] It should be noted that the first scaling relationship between the second human body model of the inspection object P and the first human body model or the human body parts and / or organ parts associated with the first image segmentation and the corresponding parts of the human body parts and / or organ parts associated with the second image segmentation can be understood as, for example, a fitting between the two regarding the angle and distance of projection, and the second distance to be adjusted is obtained by fitting on the basis of the first distance through the first scaling relationship; in addition, if the posture information reflected by multiple discrete or continuous three-dimensional spatial coordinate sets of the inspection object P is considered, a non-projection-based first scaling relationship can be provided for correction of scaling fitting of the first distance, for example, only the actual posture, distance and angle need to be considered to generate the first scaling relationship for correcting the first distance.

[0094] According to an illustrated embodiment, when the calculation unit 204 associates the first scaling relationship with the direction from the inspection object P to the X-ray source 102 to correct the first distance, for example, the first scaling relationship can be associated with the corresponding scaling ratio between the second distance, which is the position to which the X-ray source 102 needs to be adjusted, and the first distance. That is, after knowing the first scaling relationship, it is easy to convert the scaling ratio of the first distance that needs to be adjusted through a geometric relationship or geometric ratio. In addition, when the calculation unit 204 converts the corresponding scaling ratio between the second distance and the first distance, it can obtain it by performing a weighted calculation or an average calculation based on the first scaling relationship in each direction with different scaling factors. In addition, when using the first scaling relationship to perform scaling correction on the first distance, it is also necessary to consider the geometric shape of the X-rays emitted by the X-ray source 102, such as emitting X-rays in a fan-shaped or cone-shaped shape, and further consider the limitation of the beam emitter on the X-ray emission, etc.

[0095] According to an illustrated embodiment, a system 200 for adjusting the SID distance is designed to further provide more accurate image segmentation for localized human body parts and / or organ parts of an examination subject P. For example, the center of gravity of the human body parts and / or organ parts being imaged is used as the starting point or region for image segmentation of the above parts and the selection of the starting point or region from the above parts to the X-ray source. Furthermore, the system 200 measures the gravity distribution of the examination subject P when the examination subject P is supported by a scanning bed. Referring to FIG. 6 , the system 200 for adjusting the SID distance further includes a second sensing unit 206 , which includes a plurality of pressure sensors 2062 arranged along a bed plate 1042 of a scanning bed 104 . When the examination subject P is supported by the scanning bed 104 , the plurality of pressure sensors 2062 sense the gravity distribution of the examination subject P under the action of gravity. Here, the core of the bedplate 1042 may be composed of surface patches, airbags, and support members, providing a certain degree of elasticity and support. This allows the bedplate 1042 to evenly bear the weight of the examination object P and effectively transmit the weight exerted by the examination object P when it is supported. The pressure sensors 2062 may be micro-differential pressure sensors and are arranged at intervals along the core of the bedplate 1042 to sense the distribution of the weight of the examination object P when it is supported on the scanning bed 104.

[0096] According to an illustrated embodiment, the SID distance adjustment system 200 is intended to further provide more accurate image segmentation for local human body parts and / or organ parts of the inspection object P. For example, based on the center of gravity position of the human body parts and / or organ parts as the shooting target as the image segmentation of the above parts and the selection of the starting point or area from the X-ray source, the calculation unit 204 is further configured to calculate the center of gravity position of one or more second image segmentations based on the gravity distribution, and use the center of gravity position to correct the second image segmentation, so that the computer unit 204 can correct the corresponding one or more first distances according to the second scaling relationship obtained between the corrected second image segmentation and the first image segmentation, thereby improving the second distance that needs to be adjusted from the starting point or area selected in the human body parts and / or organ parts as the shooting target to the X-ray source, and obtaining a more optimized second distance that needs to be adjusted to the X-ray source. In addition, the second image segmentation is further optimized to better distinguish the boundaries and positions of each human body part and / or organ part.

[0097] According to an embodiment of the present invention, the system 200 for adjusting the SID distance is designed to further improve the efficiency, process and experience of X-ray medical imaging examinations, so that when a human body part and / or organ part is selected as a target for imaging, an interactive interface is associated with the user. Figure 5 and Figure 7The calculation unit 204 is associated with an interactive interface 212 and is configured to associate multiple triggerable controls 2122 provided on the interactive interface 212 with the corresponding human body parts and / or organ parts of the plurality of second image segments. When the controls 2122 are triggered, the calculation unit 204 determines the second distance and emission angle to be adjusted based on the second position information of the human body parts and / or organ parts of the examination subject P associated with the controls 2122 relative to the X-ray source 102. The calculation unit 204 is also associated with a position adjustment unit 208, causing the position adjustment unit 208 to adjust the position of the X-ray source 102 based on the second distance and emission angle. The interactive interface 212 can be presented on a display 210. In addition, the control 2122 can be associated with a part of the human body of the inspection object P, which may include but is not limited to: hands, feet, waist, head, chest, abdomen or neck and shoulders. For example, when an input is received to the interactive interface 212 to trigger or click the control 2122 associated with the abdomen or abdominal image segmentation, the calculation unit 204 can control the position adjustment unit 208 to adjust the position of the X-ray source 102 based on the second distance and emission angle calculated based on the image segmentation and position information of the abdomen.

[0098] Another aspect of the present disclosure provides an X-ray imaging inspection system. The X-ray imaging inspection system provided by the present disclosure is described below with reference to the accompanying drawings. Figure 8 As shown, the X-ray imaging system 100 may include: an X-ray source 102 for emitting X-rays; a scanning bed 104 for supporting an examination subject P, so that the X-ray source emits X-rays toward the examination subject while the examination subject is supported on the scanning bed for medical imaging; and the aforementioned SID distance adjustment system 200, which includes a position adjustment unit 208 configured to adaptively adjust the position of the X-ray source 102 relative to the examination subject P based at least on the subject's body geometry and position information to obtain a suitable SID distance, i.e., to adjust the distance between the X-ray source 102 and the detector 106 suitable for imaging. The SID distance can be conveniently converted to the distance between the X-ray source 102 and the examination subject, thereby meeting image clarity, signal-to-noise ratio, and other requirements. Here, the X-rays emitted by the X-ray source 102 pass through the human tissue of the examination subject P and are received by the detector 106, thereby imaging the human tissue. The X-ray imaging inspection system 100 may include but is not limited to: a C-arm X-ray machine, an X-ray machine for gastrointestinal examination, an X-ray angiography or digital X-ray vascular interventional surgery equipment, etc.

[0099] The computing portion 204 may be any machine configured to perform processing and / or computing, and may be, but is not limited to, a workstation, server, desktop computer, laptop computer, tablet computer, personal digital assistant, robot, smart phone, vehicle-mounted computer, or any combination thereof.

[0100] The memory or storage portion may include any storage device that is non-transitory and can enable data storage, and may include but is not limited to a disk drive, an optical storage device, a solid-state memory, a floppy disk, a flexible disk, a hard disk, a magnetic tape or any other magnetic medium, an optical disk or any other optical medium, a ROM (read-only memory), a RAM (random access memory), a cache memory and / or any other memory chip or cartridge, and / or any other medium from which a computer can read data, instructions and / or code.

[0101] An input device may be any type of device capable of inputting information into the computing device or computing portion 204 and may include, but is not limited to, a mouse, keyboard, touch screen, microphone, and / or remote control.

[0102] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0103] The above descriptions are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for adjusting the SID distance to adjust the position between an X-ray source for emitting X-rays and an inspection object, characterized in that: The method comprises the following steps: Acquiring at least body geometry information about the examination object and measuring first position information of the examination object relative to the X-ray generating source; Acquire a first reference human body model, wherein the first human body model and the human body parts and / or organ parts included therein are respectively associated with at least one first distance suitable for imaging from an X-ray source to the first human body model and the human body parts and / or organ parts included therein; Mapping the first human body model based on at least the body geometry information and the first position information to obtain a corresponding second human body model, wherein the second human body model has a first scaling relationship with the first human body model; The first distance is corrected by associating the first scaling relationship with the direction from the inspection object to the X-ray source to obtain a second distance to which the X-ray source needs to be adjusted; adjusting the position of the X-ray source based on the second distance and the emission angle of the X-ray source determined by second position information of the human body part and / or organ part of the examination subject as the imaging target relative to the X-ray source; The body geometry information at least includes contour information of a projection of the inspection object and / or a set of multiple feature points reflecting body parameters.

2. The method according to claim 1, characterized in that The first human body model for reference is obtained, and the first human body model and the human body parts and / or organ parts included therein are respectively associated with at least one first distance suitable for photographing from an X-ray source to each of the first human body models, including: A reference first human body model is obtained and a plurality of first image segmentations are provided to correspond to various human body parts and / or organ parts, and each of the human body parts and / or organ parts is respectively associated with at least one first distance.

3. The method according to claim 2, wherein: The mapping of the first human body model based on at least the body geometry information and the first position information to obtain a corresponding second human body model, wherein the second human body model has a first scaling relationship with the first human body model, comprises: Based on at least the body geometry information and the first position information, one or more of the first image segmentations are mapped to obtain corresponding second image segmentations, and there is a first scaling relationship between the second image segmentations and the first image segmentations of the corresponding parts, wherein multiple second image segmentations are associated with the human body parts and / or organ parts of the examination object.

4. The method according to claim 3, characterized in that Correcting one or more of the first image segments based on at least the body geometry information and the first position information to obtain corresponding second image segments includes: obtaining a gravity distribution of the inspection object; The center of gravity positions of one or more second image segments are calculated based on the gravity distribution, and the second image segments are corrected using the center of gravity positions.

5. The method according to claim 4, characterized in that The obtaining of the gravity distribution of the inspection object comprises: The inspection object is supported by a scanning bed to measure the gravity distribution of the inspection object.

6. The method according to claim 3, characterized in that The determining of the emission angle of the X-ray source based on the second distance and second position information of the human body part and / or organ part of the inspection subject as the imaging target relative to the X-ray source, and adjusting the position of the X-ray source includes: Associating the human body parts and / or organ parts corresponding to the plurality of second image segmentations with a plurality of controls provided in an interactive interface; When at least one of the controls is triggered, second position information of a body part and / or an organ part of the examination subject associated with the control relative to the X-ray source is obtained to determine a second distance and emission angle to which the X-ray source needs to be adjusted; The position of the X-ray source is adjusted based on the second distance and the emission angle, so that the X-ray source emits X-rays to the associated human body part and / or organ part of the inspection object.

7. The method according to claim 4, characterized in that The gravity distribution includes a distribution diagram represented as a heat map.

8. A SID distance adjustment system (200), associated with an X-ray imaging inspection system (100), for adjusting the position between an X-ray source (102) and an inspection object (P), characterized in that: include: The first sensing unit (202) is configured to obtain body geometry information about at least one projection of the examination object (P), and to measure first position information of the examination object (P) relative to the X-ray generator (102) and second position information of a body part and / or an organ part of the examination object (P) as a photographing target relative to the X-ray generator (102); The calculation unit (204) is configured to obtain a first human body model as a reference, wherein the first human body model and the human body parts and / or organ parts included therein are associated with at least one first distance suitable for photographing from the X-ray emission source (102) to the first human body model and the human body parts and / or organ parts included therein, The calculation unit (204) includes a mapping unit (2042) configured to map the first human body model based on at least the body geometry information and the first position information to obtain a corresponding second human body model, wherein the second human body model has a first scaling relationship with the first human body model, The calculation unit (204) is further configured to associate the first scaling relationship with the direction from the inspection object (P) to the X-ray source (102) to correct the first distance, so as to obtain a corresponding second distance to which the X-ray source needs to be adjusted; and a position adjustment unit (208) configured to be mechanically coupled to the X-ray source and further configured to be associated with the calculation unit, so that the position adjustment unit adjusts the position of the X-ray source based on the second distance and the emission angle of the X-ray source determined by the second position information; The body geometry information at least includes contour information of a projection of the inspection object and / or a set of multiple feature points reflecting body parameters.

9. The system (200) for adjusting the SID distance according to claim 8, characterized in that: The calculation unit (204) is configured to obtain the first human body model and a plurality of first image segmentations corresponding to each human body part and / or organ part provided by the first human body model, each of the human body part and / or organ part is associated with at least one of the first distances; and The mapping unit (2042) is configured to map one or more of the first image segments based on the body geometry information and the first position information to obtain corresponding second image segments, and a first scaling relationship between the second image segment and the first image segment of the corresponding part, The calculation unit (204) is configured to correct the associated first distance based on at least one of the first scaling relationships to obtain a second distance to which the X-ray source associated with the human body part and / or organ part needs to be adjusted.

10. The system (200) for adjusting the SID distance according to claim 9, characterized in that: Also includes: The second sensing unit (206) includes a plurality of pressure sensors (2062) arranged along a bed plate (1042) of a scanning bed (104), so that when the inspection object (P) is carried on the scanning bed (104), under the action of gravity, the pressure sensors (2062) sense the gravity distribution of the inspection object (P).

11. The system (200) for adjusting the SID distance according to claim 10, characterized in that: The calculation unit (204) is configured to calculate the center of gravity position of one or more second image segments based on the gravity distribution, and correct the second image segments using the center of gravity position.

12. The system (200) for adjusting the SID distance according to claim 10, characterized in that: The calculation unit (204) is associated with an interactive interface (212) and is configured to associate the human body parts and / or organ parts corresponding to the plurality of second image segmentations with a plurality of triggerable controls (2122) provided on the interactive interface (212), so that when the controls (2122) are triggered, the calculation unit (204) determines the second distance and emission angle to be adjusted based on the second position information of the human body parts and / or organ parts of the inspection object (P) associated with the controls (2122) relative to the X-ray generating source (102); The calculation unit is associated with the position adjustment unit (208), so that the position adjustment unit (208) adjusts the position of the X-ray source (102) based on the second distance and the emission angle, so that the X-ray source (102) emits X-rays to the associated human body part and / or organ part.

13. The system (200) for adjusting the SID distance according to claim 9, characterized in that: The first sensing unit (202) includes a depth camera (2022) associated with the position of the X-ray source (102) to obtain the first position information and / or the second position information, or the first sensing unit (202) includes a camera for obtaining body geometry information of the inspection object (P) and a ranging sensor for obtaining the first position information and / or the second position information, and at least the ranging sensor is associated with the position of the X-ray source (102).

14. An X-ray imaging inspection system (100), characterized in that: include: an X-ray generating source (102) for emitting X-rays; A scanning bed (104) is provided for carrying an inspection object (P), so that the inspection object (P) can be carried on the scanning bed (104) and the X-ray generating source (102) emits X-rays toward the inspection object (P) to perform medical imaging examination; as well as The SID distance adjustment system (200) according to any one of claims 8 to 13, wherein the SID distance adjustment system (200) comprises a position adjustment unit (208) configured to adaptively adjust the X-ray source (102) to a position suitable for shooting based on at least acquired body geometry information and position information of the inspection object (P).

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