CN107536618B - X-ray imaging device and detector deflection mechanism thereof - Google Patents
X-ray imaging device and detector deflection mechanism thereof Download PDFInfo
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- CN107536618B CN107536618B CN201610507066.9A CN201610507066A CN107536618B CN 107536618 B CN107536618 B CN 107536618B CN 201610507066 A CN201610507066 A CN 201610507066A CN 107536618 B CN107536618 B CN 107536618B
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Abstract
The invention discloses an X-ray imaging device and a detector deflection mechanism thereof, wherein the detector deflection mechanism comprises: the substrate is provided with an offset guide groove; a rotary motor mounted on the substrate; the rotary seat is in transmission connection with the rotary motor and is driven by the rotary motor to rotate; the detector mounting plate is used for mounting a detector and is movably mounted on the rotary seat; the offset guide rod is connected with the detector mounting plate and movably matched in the offset guide groove along the offset guide groove, the rotary seat is driven by the rotary motor to rotate, the detector mounting plate is driven to rotate, and the detector mounting plate moves relative to the rotary seat under the action of the offset guide rod moving along the offset guide groove. The detector deflection mechanism for the X-ray imaging device can enlarge the imaging field of view and is low in cost.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a detector deflection mechanism for an X-ray imaging device and the X-ray imaging device with the detector deflection mechanism for the X-ray imaging device.
Background
Related art X-ray imaging apparatuses such as CT (computed tomography) machines, CBCT (cone beam computed tomography) machines, etc. are widely used for medical examination, and mainly include a rotating gantry, and a source and a detector which are oppositely disposed on the rotating gantry. The detector is an important component of the X-ray imaging device, the larger the imaging area of the detector is, the larger the shooting field of view is, the more expensive the price is, and in order to ensure that the X-ray can cover the whole imaging area of the detector under the condition of the same focal distance between the detector and the source, the larger the imaging area of the detector is, the larger the cone angle of the source device is, and the cost of the source device is correspondingly increased.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the related art. Therefore, the invention provides a detector deflection mechanism for an X-ray imaging device, which can enlarge an imaging field of view and has low cost.
The invention also provides an X-ray imaging device with the detector deflection mechanism for the X-ray imaging device.
To achieve the above object, an embodiment according to a first aspect of the present invention proposes a detector deflecting mechanism for an X-ray imaging apparatus, including: the substrate is provided with an offset guide groove; a rotary motor mounted on the substrate; the rotary seat is in transmission connection with the rotary motor and is driven by the rotary motor to rotate; the detector mounting plate is used for mounting a detector and is movably mounted on the rotary seat; the offset guide rod is connected with the detector mounting plate and movably matched in the offset guide groove along the offset guide groove, the rotary seat is driven by the rotary motor to rotate, the detector mounting plate is driven to rotate, and the detector mounting plate moves relative to the rotary seat under the action of the offset guide rod moving along the offset guide groove.
The detector deflection mechanism for the X-ray imaging device can enlarge the imaging field of view and is low in cost.
In addition, the detector deflection mechanism for the X-ray imaging device according to the embodiment of the invention may further have the following additional technical features:
according to one embodiment of the invention, the maximum rotatable angle of the swivel base is greater than 0 ° and equal to or less than 90 °.
According to one embodiment of the present invention, the maximum rotatable angle of the rotary base is 90 °, the distances from the two ends of the offset guide groove to the rotation axis of the rotary base are OA and OC, respectively, and the length of the probe is h1 and the width is h2, wherein | OA-OC | ═ 1/2 × (h1-h 2).
According to one embodiment of the invention, the offset guide slot is circular or rectilinear.
According to one embodiment of the invention, a central through hole is formed in the base plate, and the rotary motor is in transmission connection with the rotary seat through a rotary shaft penetrating through the central through hole.
According to one embodiment of the invention, the rotary electric machine is mounted on the base plate by a motor mount.
According to one embodiment of the invention, the rotating shaft is connected to a rotating shaft of the rotating motor by a coupling.
According to one embodiment of the invention, the swivel shaft is provided with a swivel bearing, and the swivel bearing is arranged in the central through hole.
According to one embodiment of the invention, the swivel shaft is connected to the swivel base by an upper nut above the swivel base and a lower nut below the swivel bearing.
According to one embodiment of the invention, an end cap is provided between the swivel base and the swivel bearing.
According to one embodiment of the invention, a plurality of gear grooves are formed in the base plate, gear plungers are arranged on the rotary seat, and the gear plungers are matched in different gear grooves when the rotary seat rotates to different positions.
According to one embodiment of the invention, each gear groove is arranged in pairs, the gear plungers are arranged in pairs, and the gear plungers arranged in pairs are matched in the gear grooves in different pairs when the rotary seat rotates to different positions.
According to one embodiment of the invention, the rotary base is provided with a slide rail and the detector mounting plate is provided with a slide block, and the slide block is slidably matched on the slide rail.
According to one embodiment of the invention, the offset guide bar is provided with a guide bar bearing, which fits movably in the offset guide groove along the offset guide groove.
An embodiment according to a second aspect of the invention proposes an X-ray imaging apparatus comprising: a rotating frame; according to the detector deflecting mechanism for the X-ray imaging device, the substrate is mounted on the rotary frame; a probe mounted on the probe mounting plate; the radioactive source device rotating mechanism is arranged on the rotating rack; the radioactive source device is installed on the radioactive source device rotating mechanism and is driven to rotate by the radioactive source device rotating mechanism.
According to the X-ray imaging device provided by the embodiment of the invention, by utilizing the detector deflection mechanism for the X-ray imaging device provided by the embodiment of the first aspect of the invention, the advantages of wide imaging field of view, low cost and the like are achieved.
According to an embodiment of the invention, the source rotator comprises: a source connector link pivotally mounted on the rotating gantry, the source being mounted on the source connector link; the pivoting motor is installed on the rotary frame and is in transmission connection with the source connector connecting frame, and the source connector connecting frame is driven to pivot by the pivoting motor.
According to an embodiment of the invention, the source rotator further comprises: and the pivoting motor is in transmission connection with the radioactive source connector connecting frame through the variable speed transmission assembly.
According to one embodiment of the invention, the variable speed drive assembly comprises: the driving gear is in transmission connection with a rotating shaft of the pivoting motor; the driven gear is in transmission connection with the radioactive source connector connecting frame, meshed with the driving gear and larger than the driving gear in diameter.
According to one embodiment of the invention, one of the rotating frame and the source connector frame is provided with a rotating shaft and the other is provided with a rotating shaft hole, and the rotating shaft is rotatably matched in the rotating shaft hole.
According to one embodiment of the invention, the rotating shaft is provided with a pivot bearing, and the pivot bearing is installed in the rotating shaft hole.
Drawings
Fig. 1 is a schematic structural diagram of an X-ray imaging apparatus according to an embodiment of the present invention.
Fig. 2 is an exploded view of a detector deflection mechanism for an X-ray imaging device according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a detector deflection mechanism for an X-ray imaging device according to an embodiment of the present invention.
FIG. 4 is a partial cross-sectional view of a detector deflection mechanism for an X-ray imaging device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a base body of a detector deflecting mechanism for an X-ray imaging apparatus according to an embodiment of the present invention.
Fig. 6-8 are schematic diagrams of the movement of a detector deflection mechanism for an X-ray imaging apparatus according to an embodiment of the present invention.
FIG. 9 is a cross-sectional view of a source rotator of an X-ray imaging device according to an embodiment of the present invention.
Fig. 10 is a schematic view of the imaging field of view transformation principle of the detector deflecting mechanism for the X-ray imaging apparatus according to the embodiment of the present invention.
Reference numerals:
an X-ray imaging apparatus 1,
A rotating frame 10, a detector deflection mechanism 20, a detector 30, a radiation source rotating mechanism 40, a radiation source 50,
A base plate 100, an offset guide groove 110, a central through hole 120, a shift groove 130,
A rotary motor 200, a rotary shaft 210, a motor bracket 220, a coupler 230, a rotary bearing 240, an upper nut 250, a lower nut 260, an end cover 270,
A rotary seat 300, a gear plunger 310, a slide rail 320,
A detector mounting plate 400, a slide block 410,
A radioactive source connector frame 41, a pivot motor 42, a rotating shaft 43, a pivot bearing 44, a variable speed transmission assembly 45, a driving gear 46 and a driven gear 47.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Related-art X-ray imaging apparatuses are classified into two types: one is a detector which is directly opposite to an X-ray imaging device, namely a detector is bisected by a vertical plane where a rotating axis of a rotating rack is located, and the rotating rack rotates 180 degrees to perform 3D reconstruction when in work; and the other type is an offset X-ray imaging device, for example, a vertical plane where the rotation axis of the rotating frame is positioned is flush with the edge of the detector, and the rotating frame rotates 360 degrees to perform 3D reconstruction during operation.
For an offset X-ray imaging device, due to factors such as assembly errors, a certain margin S is usually left during offset, that is, the distance between the intersection line of the vertical plane where the rotation axis of the rotating frame is located and the detector and the edge of the detector is S, and meanwhile, in order to cover the imaging area of the detector, the radiation source device also needs to be offset by a certain angle towards the detector.
In practical clinical application, according to different clinical use requirements, doctors have different requirements on the height direction and the width direction, sometimes the view field in the width direction needs to be larger, and sometimes the view field in the height direction needs to be larger.
In view of the technical situation of the X-ray imaging apparatus in the related art, the present invention provides an X-ray imaging apparatus 1 and a detector deflection mechanism 20 thereof, which can improve the imaging field of view and ensure the cost.
An X-ray imaging apparatus 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1, an X-ray imaging apparatus 1 according to an embodiment of the present invention includes a rotating gantry 10, a detector deflecting mechanism 20, a detector 30, a source device rotating mechanism 40, and a source device 50.
First, a detector deflecting mechanism 20 for an X-ray imaging apparatus according to an embodiment of the present invention is described with reference to the drawings.
As shown in fig. 1 to 10, a detector deflecting mechanism 20 for an X-ray imaging apparatus according to an embodiment of the present invention includes a base plate 100, a rotary motor 200, a rotary base 300, a detector mounting plate 400, and a deflection guide 500.
The substrate 100 is provided with an offset guide groove 110. Rotary motor 200 is mounted on substrate 100. The rotary base 300 is in transmission connection with the rotary motor 200, and the rotary base 300 is driven by the rotary motor 200 to rotate. The probe mounting plate 400 is used to mount the probe 30, and the probe mounting plate 400 is movably mounted on the turret 300. The deviation guide rod 500 is connected with the detector mounting plate 400, and the deviation guide rod 500 is movably fitted in the deviation guide groove 110 along the length direction of the deviation guide groove 110, when the rotary base 300 is driven to rotate by the rotary motor 200, the detector mounting plate 400 is driven to rotate, and the detector mounting plate 400 moves relative to the rotary base 300 under the action of the deviation guide rod 500 moving along the deviation guide groove 110.
The following describes, by way of example, a swivel offset process of the detector deflecting mechanism 20 for an X-ray imaging apparatus according to an embodiment of the present invention.
The rotary motor 200 drives the rotary base 300 to synchronously rotate during operation, the rotary base 300 drives the detector mounting plate 400 and the detector 30 thereon to synchronously rotate, meanwhile, the detector mounting plate 400 drives the deviation guide rod 500 to move along the deviation guide groove 110 in the rotating process, because the deviation guide rod 500 is restrained by the deviation guide groove 110, the deviation guide rod 500 can drive the detector mounting plate 400 to translate relative to the rotary base 300, namely, the detector 30 rotates and translates, and the specific relation between the rotation angle and the translation distance of the detector 30 can be set according to actual needs.
In the X-ray imaging apparatus 1 according to the embodiment of the present invention, the substrate 100 is mounted on the rotating gantry 10. The probe 30 is mounted on the probe mounting plate 400. The source rotator 40 is mounted on the rotator frame 10 and is disposed opposite to the detector deflecting mechanism 20. The radiation source device 50 is mounted on the radiation source device rotating mechanism 40, and the radiation source device 50 is driven to rotate by the radiation source device rotating mechanism 40.
According to the detector deflecting mechanism 20 for the X-ray imaging device of the embodiment of the invention, by arranging the rotary motor 200 and the rotary base 300 which are in transmission connection, the rotary base 300, the detector mounting plate 400 and the detector 30 can be sequentially driven to rotate by the rotary motor 200, the detector mounting plate 400 is further movably mounted on the rotary base 300 and is provided with the offset guide rod 500 which is connected with the detector mounting plate 400 and is matched in the offset guide groove 110 of the substrate 100, the detector mounting plate 400 and the detector 30 can be driven to translate by the offset guide rod 500, so that the rotation and translation of the detector 30 are realized, the different requirements of a doctor on the height and width directions of a shooting visual field can be met, the offset allowance S of the detector 30 can be adjusted, and the detector 30 after the rotary offset can be covered by a radiation source in combination with the adjustment of the rotary radiation source mechanism 40 on the radiation source, different clinical requirements are realized, and a detector with higher replacement cost is not needed. Therefore, the detector deflecting mechanism 20 for the X-ray imaging device according to the embodiment of the invention can enlarge the imaging field of view and has lower cost.
The X-ray imaging apparatus 1 according to the embodiment of the present invention has the advantages of a wide imaging field of view, low cost, and the like by using the detector deflecting mechanism 20 for the X-ray imaging apparatus according to the above-described embodiment of the present invention.
Other constructions and operations of the X-ray imaging apparatus 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
The detector deflecting mechanism 20 for an X-ray imaging apparatus according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 10, a detector deflecting mechanism 20 for an X-ray imaging apparatus according to an embodiment of the present invention includes a base plate 100, a rotary motor 200, a rotary base 300, a detector mounting plate 400, and a deflection guide 500.
As shown in fig. 5 to 8 and 10, the maximum rotatable angle of the rotary base 300 is greater than 0 ° and equal to or less than 90 °, that is, the maximum rotatable angle of the detector 30 is greater than 0 ° and equal to or less than 90 °.
For example, the maximum rotatable angle of the rotary base 300 is equal to 90 °.
Thus, as shown in FIG. 7, when a wider field of view is desired, the long side of the detector 30 is offset and the short side is parallel to the axis L (i.e., the intersection of the detector 30 and the vertical plane in which the axis of rotation of the rotating gantry 10 lies). As shown in fig. 6, when a greater height field of view is desired, the short sides of the detector 30 are offset and the long sides are parallel to the axis L. And, the offset margin S is adjustable to obtain a desired imaging field of view.
As shown in fig. 10 (wherein the circle indicates the source coverage of the source unit 50), since the center of the field of view is offset with respect to the axis L after the offset of the detector 30, the field of view of the detector 30 in the height and width directions can be balanced according to practical requirements, and the field of view of the source unit 50 is moved cooperatively to cover the entire imaging area of the detector 30.
Alternatively, the distances between the two ends of the offset guide groove 110 and the rotation axis of the rotary base 300 are OA and OC, respectively, and the length of the probe 30 is h1 and the width is h2, wherein | OA-OC | ═ 1/2 × (h1-h2), thereby ensuring that the offset margin S before and after the rotary offset of the probe 30 is maintained.
Specifically, as shown in fig. 6, the distance between the long side of the probe 30 and the axis L before the rotational offset is S1 (as shown in fig. 6), when the rotary base 300 is rotated by 90 ° by the rotary motor 200, the probe 30 is also rotated by 90 ° along with the rotary base 300, and at the same time, the offset guide 500 moves in the offset guide groove 110 of the base plate 100, and is constrained by the offset guide groove 110, the probe 30 also translates relative to the rotary base 300 while rotating, and after the movement is completed (as shown in fig. 7), the rotational center of the probe 30 is offset by w, the absolute value of the difference between OA and OC is the distance of translation of the probe 30, i.e., | OA-OC | w, and when w is 1/2 × (h1-h2), the offset margin S before and after the rotational offset of the probe 30 is kept constant, i.e., the distance S2 between the short side of the probe 30 and the axis L after the rotational offset is S1.
It should be understood by those skilled in the art that the shape of the offset guide slot 110 determines the real-time relationship between the distance of the probe 30 translating and the rotation angle, and does not affect the position of the final probe 30, therefore, the shape of the offset guide slot 110 can be any curved shape, such as circular arc, even straight (as shown in fig. 5), as long as the difference between the distances of the two ends of the offset guide slot 110 from the rotation axis of the turret 300 (difference between OA and OC) is the same, the distance of the probe 30 translating by 90 ° is the same, and thus changing the value of w can change the offset distance of the probe 30 rotating by 90 °.
When w is equal to 0, the detector 30 is equivalent to being rotated around the rotation center, that is, the detector deflecting mechanism 20 may be applied not only to the offset X-ray imaging apparatus but also to the direct X-ray imaging apparatus.
Of course, according to the probe deflecting mechanism 20 of the embodiment of the present invention, the offset margin S before and after the rotation offset of the probe 30 may be different, i.e., S1 ≠ S2, as long as it is ensured that 0 ≦ S1 < h2 and 0 ≦ S2 < h1, in other words, the vertical plane where the rotation axis of the rotating gantry 10 is located needs to intersect with the imaging area of the probe 30.
Alternatively, as shown in fig. 10, the detector 30 is preferably rotated by 90 °, but the present invention is not limited thereto, and the rotation angle of the detector 30 may be smaller than 90 °, for example, as shown in fig. 8, the rotation angle of the detector 30 by 45 ° may increase the imaging area, and in addition, the drawing shows an example in which the detector 30 is rotated clockwise, and the detector 30 may be rotated counterclockwise.
In some embodiments of the present invention, as shown in fig. 2 and 3, a central through hole 120 is formed in the substrate 100 to penetrate the substrate 100 in a vertical direction, the rotary motor 200 is mounted on the lower surface of the substrate 100 through a motor bracket 220, the rotary base 300 is positioned above the substrate 100, and the rotary motor 200 is drivingly connected to the rotary base 300 through a rotary shaft 210 penetrating the central through hole 120.
Specifically, as shown in fig. 2 and 3, a rotary bearing 240 is provided on the rotary shaft 210, the rotary bearing 240 is installed in the central through hole 120, the lower end of the rotary shaft 210 is connected to the rotary shaft of the rotary motor 200 through a coupling 230, an upper nut 250 and a lower nut 260 are screwed on the rotary shaft 210, the upper nut 250 is located above the rotary base 300 and the lower nut 260 is located below the rotary bearing 240, and the rotary shaft 210 is fastened to the rotary base 300 through the upper nut 250 and the lower nut 260. Therefore, the assembly of the rotating shaft 210, the rotating motor 200, the substrate 100 and the rotating base 300 is realized, and the structure is simple, firm and reliable.
Further, as shown in fig. 2 and 3, an end cap 270 is disposed between the rotary base 300 and the rotary bearing 240, and the end cap 270 can enlarge a contact area between an inner ring of the rotary bearing 240 and the rotary base 300, thereby ensuring the stability of rotation.
In some embodiments of the present invention, as shown in fig. 2 and 4, a plurality of shift slots 130 are formed on the base plate 100, and a shift plunger 310 is disposed on the rotary base 300, so that the shift plunger 310 fits into different shift slots 130 when the rotary base 300 rotates to different positions.
Alternatively, each of the shift grooves 130 is provided in pairs and the shift plungers 310 are provided in pairs, the paired shift plungers 310 being engaged in different pairs of shift grooves 130 when the turret 300 is rotated to different positions.
For example, the shift grooves 130 are two pairs, i.e., four, and the four shift grooves 130 are equally spaced on a circumference concentric with the central through hole 120, and each of the shift grooves 130 is a hemispherical groove. The gear position plungers 310 are a pair, i.e., two, and the two gear position plungers 310 are arranged opposite to each other in the radial direction of the rotary shaft 210. When the rotary base 300 is in the initial position, two shift plungers 310 are engaged in two shift grooves 130, and when the rotary base 300 is rotated to the right position, two shift plungers 310 are engaged in the other two shift grooves 130, wherein the positions and the number of the shift grooves 130 are related to the positions where the rotary base 300 or the detector 30 needs to be fixed.
Therefore, the stability of the rotary base 300 and the detector 30 at a specific rotary position can be improved by the cooperation of the gear plunger 310 and the gear groove 130, so that the vibration of the detector 30 caused by the rotation of the rotary motor 200 or the shaking of other components is prevented, and the image imaging quality of the detector 30 is ensured.
In some specific examples of the present invention, as shown in fig. 2 and 3, the turntable 300 is provided with a slide rail 320 and the probe mounting plate 400 is provided with a slider 410, and the slider 410 is slidably fitted on the slide rail 320. Therefore, the detector mounting plate 400 can be movably mounted on the rotary base 300, and the structure is reliable and the relative motion is stable.
For example, as shown in fig. 2, the upper surface of the rotary base 300 is provided with two sliding rails 320, the two sliding rails 320 are distributed on two short sides of the rotary base 300, and each of the two short sides of the detector mounting plate 400 is provided with two spaced sliding blocks 410, wherein the two sliding blocks 410 on one short side of the detector mounting plate 400 are slidably fitted on one sliding rail 320, and the two sliding blocks 410 on the other short side of the detector mounting plate 400 are slidably fitted on the other sliding rail 320.
In some embodiments of the present invention, as shown in fig. 2 and 4, the lower end of the offset guide 500 is provided with a guide bearing 510, and the guide bearing 510 is movably fitted in the offset guide 110 along the length direction of the offset guide 110, so that the assembly of the offset guide 500 and the base plate 100 can be achieved, and the offset guide 500 can not only slide along the offset guide 110 but also rotate, thereby ensuring the smooth movement of the offset guide 500 and the pushing effect on the translation of the probe mounting plate 400.
Alternatively, the upper end of the offset guide 500 and the probe mounting plate 400 and the lower end and the guide shaft bearing 510 may be fastened by screws, respectively.
In some embodiments of the present invention, as shown in fig. 1 and 9, the radioactive source slewing mechanism 40 comprises a radioactive source coupling frame 41 and a pivoting motor 42.
The radioactive source connector bracket 41 is pivotally mounted on the revolving gantry 10 with the pivot axis of the radioactive source connector bracket 41 perpendicular to the rotation axis of the revolving base 300, and the radioactive source 50 is mounted on the radioactive source connector bracket 41. The pivoting motor 42 is installed on the revolving frame 10 and is in transmission connection with the radioactive source connector frame 41, and the radioactive source connector frame 41 is driven to pivot by the pivoting motor 42. Thereby, the pivoting motor 42 drives the radiation source connector frame 41 to pivot, thereby driving the radiation source 50 on the radiation source connector frame 41 to move, thereby adjusting the radiation source coverage of the radiation source 50.
Specifically, as shown in fig. 9, one of the rotating gantry 10 and the source connector bracket 41 is provided with a rotating shaft 43 and the other is provided with a rotating shaft hole in which the rotating shaft 43 is rotatably fitted. For example, the rotating frame 10 is provided with two rotating shaft holes oppositely arranged, the two ends of the radiation source connector 41 are respectively provided with a rotating shaft 43, and the two rotating shafts 43 are respectively and rotatably matched in the two rotating shaft holes.
Further, as shown in fig. 9, two pivot bearings 44 are respectively disposed on the two rotating shafts 43, the two pivot bearings 44 are respectively mounted in the two rotating shaft holes, and two bearing covers respectively disposed outside the two pivot bearings 44 are further disposed on the revolving frame 10.
In some specific examples of the present invention, as shown in fig. 1 and 9, the source machine slewing mechanism 40 further comprises a variable speed drive assembly 45. The pivoting motor 42 is drivingly connected to the source connector bracket 41 through a variable speed drive assembly 45. Through the variable speed transmission assembly 45, the pivoting speed and the pivoting angle of the output of the pivoting motor 42 to the radiation source connector frame 41 can be adjusted, so that the movement speed and the movement angle of the radiation source 50 can be adjusted, and the movement of the radiation source 50 is more smooth.
Specifically, as shown in fig. 1 and 9, the speed change transmission assembly 45 includes a driving gear 46 and a driven gear 47, and the diameter of the driven gear 47 is larger than that of the driving gear 46, i.e., the speed change transmission assembly 45 is a speed reduction transmission assembly. The driving gear 46 is in driving connection with the rotating shaft of the pivot motor 42. The driven gear 47 is in transmission connection with a rotating shaft 43 on the radioactive source connecting frame 41, and the driven gear 47 is meshed with the driving gear 46 to reduce the speed of the torque of the pivoting motor 42 and transmit the torque to the radioactive source connecting frame 41.
According to the X-ray imaging device 1 and the detector deflection mechanism 20 thereof provided by the embodiment of the invention, the rotation and translation of the detector 30 can be realized, so that different requirements of a doctor on the height and width directions of a shooting visual field can be met, for example, when a wider visual field is required, the long side of the detector 30 is offset, and the short side is parallel to the axis L; when a greater height field of view is desired, the short sides of the detector 30 are offset and the long sides are parallel to the axis L. Moreover, the offset margin S of the detector 30 is adjustable, so that the offset margin S after the rotation offset of the detector 30 can be equal or unequal, the offset margin S can also be equal to 0 so as to be applied to the X-ray imaging device, and the radiation source can cover the detector 30 after the rotation offset by combining the adjustment of the radiation source device rotating mechanism 40 to the radiation source device 50, thereby realizing different clinical requirements without replacing the detector and the radiation source device with higher cost.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (20)
1. A detector deflection mechanism for an X-ray imaging apparatus, comprising:
the substrate is provided with an offset guide groove;
a rotary motor mounted on the substrate;
the rotary seat is in transmission connection with the rotary motor and is driven by the rotary motor to rotate;
the detector mounting plate is used for mounting a detector and is movably mounted on the rotary seat;
the offset guide rod is connected with the detector mounting plate and movably matched in the offset guide groove along the offset guide groove, the rotary seat is driven by the rotary motor to rotate, the detector mounting plate is driven to rotate, and the detector mounting plate moves relative to the rotary seat under the action of the offset guide rod moving along the offset guide groove.
2. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 1, wherein a maximum rotatable angle of the turret is greater than 0 ° and equal to or less than 90 °.
3. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 2, wherein the maximum rotatable angle of the turret is 90 °, the distances between both ends of the offset guide groove and the rotation axis of the turret are OA and OC, respectively, and the length of the detector is h1 and the width is h2, where i OA-OC is 1/2X (h1-h 2).
4. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 1, wherein the offset guide groove is circular arc-shaped or linear.
5. The detector deflecting mechanism for an X-ray imaging apparatus according to any one of claims 1 to 4, wherein a central through hole is formed in the substrate, and the rotary motor is in transmission connection with the rotary base through a rotary shaft penetrating through the central through hole.
6. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 5, wherein the rotary motor is mounted on the base plate through a motor bracket.
7. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 5, wherein the rotary shaft is connected to a rotary shaft of the rotary motor through a coupling.
8. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 5, wherein a rotary bearing is provided on the rotary shaft, and the rotary bearing is installed in the central through hole.
9. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 8, wherein the swivel shaft is connected to the swivel base by an upper nut located above the swivel base and a lower nut located below the swivel bearing.
10. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 8, wherein an end cap is provided between the turret and the slew bearing.
11. The detector deflecting mechanism for an X-ray imaging apparatus according to any one of claims 1 to 4, wherein a plurality of shift grooves are provided on the base plate and shift plungers are provided on the rotary base, and the shift plungers fit into different shift grooves when the rotary base is rotated to different positions.
12. The detector deflecting mechanism for an X-ray imaging apparatus according to claim 11, wherein each of the shift grooves is provided in pairs and the shift plungers are provided in pairs, and the paired shift plungers are engaged in different pairs of shift grooves when the rotary base is rotated to different positions.
13. The detector deflecting mechanism for an X-ray imaging apparatus according to any one of claims 1 to 4, wherein a slide rail is provided on the rotary base and a slider is provided on the detector mounting plate, the slider being slidably fitted on the slide rail.
14. The detector deflecting mechanism for an X-ray imaging apparatus according to any one of claims 1 to 4, wherein the offset guide bar is provided with a guide bar bearing, and the guide bar bearing is movably fitted in the offset guide groove along the offset guide groove.
15. An X-ray imaging apparatus, characterized by comprising:
a rotating frame;
the detector deflecting mechanism for an X-ray imaging apparatus according to any one of claims 1 to 14, the base plate being mounted on the rotating gantry;
a probe mounted on the probe mounting plate;
the radioactive source device rotating mechanism is arranged on the rotating rack;
the radioactive source device is installed on the radioactive source device rotating mechanism and is driven to rotate by the radioactive source device rotating mechanism.
16. The X-ray imaging apparatus of claim 15, wherein the source rotator comprises:
a source connector link pivotally mounted on the rotating gantry, the source being mounted on the source connector link;
the pivoting motor is installed on the rotary frame and is in transmission connection with the source connector connecting frame, and the source connector connecting frame is driven to pivot by the pivoting motor.
17. The X-ray imaging apparatus of claim 16, wherein the source rotator further comprises:
and the pivoting motor is in transmission connection with the radioactive source connector connecting frame through the variable speed transmission assembly.
18. The X-ray imaging apparatus of claim 17, wherein the variable speed drive assembly comprises:
the driving gear is in transmission connection with a rotating shaft of the pivoting motor;
the driven gear is in transmission connection with the radioactive source connector connecting frame, meshed with the driving gear and larger than the driving gear in diameter.
19. The X-ray imaging apparatus according to claim 16, wherein one of the rotating gantry and the source connector bracket is provided with a rotating shaft and the other is provided with a rotating shaft hole, and the rotating shaft on the source connector bracket is rotatably fitted in the rotating shaft hole.
20. The X-ray imaging apparatus of claim 19, wherein a pivot bearing is provided on the shaft on the source connector mount, the pivot bearing being mounted in the shaft bore.
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| CN201610507066.9A CN107536618B (en) | 2016-06-29 | 2016-06-29 | X-ray imaging device and detector deflection mechanism thereof |
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| CN201610507066.9A CN107536618B (en) | 2016-06-29 | 2016-06-29 | X-ray imaging device and detector deflection mechanism thereof |
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| CN107536618B true CN107536618B (en) | 2020-05-15 |
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| CN108364707B (en) * | 2018-03-20 | 2023-09-22 | 合肥美亚光电技术股份有限公司 | Ray collimator and ray radiation device |
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| CN107536618A (en) | 2018-01-05 |
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