CN113081019A

CN113081019A - Image forming apparatus and image forming method

Info

Publication number: CN113081019A
Application number: CN202110380489.XA
Authority: CN
Inventors: 刘喆; 凡玉杰; 张韦; 王奥
Original assignee: Hefei Yofo Medical Technology Co ltd
Current assignee: Hefei Yofo Medical Technology Co ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-07-09

Abstract

The present disclosure provides an image forming apparatus including: a radiation source for emitting X-rays toward an object to be irradiated; a detector that receives the X-rays and generates a radiographic image through the irradiated object; a drive mechanism which drives so that the radiation source and the detector perform relative movement with the irradiated object; the detection device is used for measuring a plurality of change positions of the radiation source and the detector and the irradiated object in the relative movement process; and a controller that controls the source to emit X-rays and the detector to receive X-rays based on each of the plurality of varied positions measured by the detection device. The present disclosure also provides an imaging method.

Description

Image forming apparatus and image forming method

Technical Field

The present disclosure relates to an imaging apparatus and an imaging method.

Background

Imaging techniques, including for example X-ray imaging, CT (Computed Tomography), etc., have since been widely used in many fields, especially in the field of medical examinations. For example, oral CT may reflect the illuminated object from three-dimensional angles.

At present, in the process of image shooting, X-ray sources uniformly emit X-rays according to a certain rule. Therefore, in order to ensure the consistency of the images, the X-ray imaging device can only emit X-rays to perform shooting operation at the constant speed stage of the scanning process, and does not operate at other stages of the scanning process.

Fig. 1 shows a schematic diagram of an image capturing process of a conventional X-ray imaging apparatus. The box in the figure illustrates an X-ray imaging device which performs a circular movement around a centre of rotation during scanning. P11-P13 are several positions of the X-ray imaging device during scanning: p11 is the initial position, P12 is the uniform motion start position, and P13 is the deceleration stop position. S11-S14 are several motion phases of the X-ray imaging device in the scanning process: in the stage of S11, the X-ray imaging device starts to accelerate; in the stage of S12, the X-ray imaging equipment reaches the position P12, rotates at a constant speed for 360 degrees and returns to the position P12; stage S13, the X-ray imaging device starts to decelerate and stops at the position P13; and in the stage of S14, the X-ray imaging device rotates around, stops when the P11 position is reached, and the whole scanning process is finished.

From the above analysis, the conventional X-ray imaging apparatus performs the photographing operation only at the stage S12 in fig. 1, and the other scanning stages are redundant to the X-ray imaging apparatus. In this way the X-ray imaging apparatus works efficiently for a short time, increasing the waiting time for the patient.

Disclosure of Invention

In order to solve one of the above-described technical problems, the present disclosure provides an imaging apparatus and an imaging method.

According to an aspect of the present disclosure, an image forming apparatus includes:

a source for emitting X-rays toward an object to be irradiated;

a detector that receives the X-rays and generates a radiographic image through the illuminated object;

a drive mechanism that drives for relative movement of the source and detector and the irradiated subject;

a detector arrangement for measuring a plurality of varying positions of the source and detector and the irradiated object during relative movement; and

a controller that controls the source to emit X-rays and the detector to receive the X-rays based on each of the plurality of varied positions measured by the detection device.

According to an embodiment of the present disclosure, the controller controls the source to emit X-rays and controls the detector to receive the X-rays when the measured change position coincides with a preset measurement position.

According to the imaging apparatus of one embodiment of the present disclosure, the relative movement is performed in accordance with a preset path which is a path between a start position to a stop position of the relative movement, and the preset path is divided into a plurality of shooting cycles, and a corresponding preset measurement position is determined on the basis of each shooting cycle such that a time of passing two adjacent preset measurement positions is taken as one shooting cycle.

According to an imaging apparatus of an embodiment of the present disclosure, a time required to pass each photographing cycle is greater than or equal to one exposure time of the source.

According to the imaging device of one embodiment of the present disclosure, the driving device drives the radiation source and the detector to rotate or drives the bearing platform bearing the irradiated object to rotate.

According to the imaging device of one embodiment of the present disclosure, the driving mechanism is a rotating mechanism, and the rotating mechanism drives the radiation source and the detector to rotate around the irradiated object or the rotating mechanism drives the carrying platform to rotate so that the irradiated object rotates relative to the radiation source and the detector.

According to an embodiment of the present disclosure, the detection device is configured to measure a current rotation angle of the rotating mechanism as the indication of the changed position, and the controller controls the source to emit X-rays and the detector to receive the X-rays based on the current rotation angle.

According to an embodiment of the present disclosure, when the measured current rotation angle coincides with a preset measurement angle, the controller controls the source to emit X-rays and controls the detector to receive the X-rays.

According to the imaging apparatus of one embodiment of the present disclosure, the angle between the start position to the stop position of the rotation mechanism is divided into a plurality of shooting cycles, and the corresponding preset measurement angle is determined on the basis of each shooting cycle such that the time of two adjacent preset measurement angles elapses as one shooting cycle.

According to the imaging apparatus of one embodiment of the present disclosure, the angle between the start position to the stop position of the rotation mechanism is equally divided into a plurality of shooting cycles.

According to the image forming apparatus of one embodiment of the present disclosure, the detection device is any electronic component having an angle measurement function, such as a photoelectric angle encoder or a resolver.

According to the imaging device of one embodiment of the present disclosure, photographing of the irradiated object is completed by one rotation circle.

According to an embodiment of the present disclosure, the one rotation circumference includes a rotation acceleration stage, a rotation uniform stage, and a rotation deceleration stage.

According to an embodiment of the present disclosure, the X-rays are pulsed X-rays, optionally high power pulsed X-rays.

According to another aspect of the present disclosure, there is provided an imaging method of imaging by the imaging apparatus as described in any one of the above, including:

detecting, by the detection arrangement, a plurality of varying positions of the source and detector and the irradiated object during relative movement;

controlling, by the controller, the source to emit X-rays and the detector to receive the X-rays based on each of the plurality of varying positions.

According to the imaging method of one embodiment of the present disclosure, it is determined whether the change position is consistent with a preset measurement position, and if so, the controller controls the radiation source to emit X-rays and controls the detector to receive the X-rays.

According to an imaging method of an embodiment of the present disclosure, the relative movement is made along a preset path, the preset path is a path between a start position to a stop position of the relative movement, and the preset path is divided into a plurality of shooting cycles, and a corresponding preset measurement position is determined on the basis of each shooting cycle such that a time of passing two adjacent preset measurement positions is taken as one shooting cycle.

According to an imaging method of an embodiment of the present disclosure, a time required to pass each photographing cycle is greater than or equal to one exposure time of the source.

According to an embodiment of the imaging method of the present disclosure, the source and the detector are driven to rotate by the driving device, or a carrying platform carrying the irradiated object is driven to rotate by the driving device.

According to an embodiment of the present disclosure, the detector measures a current rotation angle as the indication of the changed position, and the controller controls the source to emit X-rays and the detector to receive X-rays based on the current rotation angle.

According to an imaging method of an embodiment of the present disclosure, an angle between a start rotational position to a stop rotational position is divided into a plurality of photographing periods, and a corresponding preset measurement angle is determined based on each photographing period such that a time of two adjacent preset measurement angles elapses as one photographing period.

According to the imaging method of one embodiment of the present disclosure, the angle between the start rotational position to the stop rotational position is equally divided into a plurality of photographing periods.

According to the imaging method of one embodiment of the present disclosure, the photographing of the irradiated object is completed by one rotation circle.

According to an imaging method of an embodiment of the present disclosure, the one rotation circumference includes a rotation acceleration stage, a rotation uniform stage, and a rotation deceleration stage.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of an image capturing process of a conventional X-ray imaging apparatus.

Fig. 2 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of an image capturing process of an imaging apparatus according to an embodiment of the present disclosure.

Fig. 4 is a flow chart of an imaging method according to one embodiment of the present disclosure.

Fig. 5 is a flow chart of an imaging method according to one embodiment of the present disclosure.

Fig. 6 is a flow chart of an imaging method according to one embodiment of the present disclosure.

Description of reference numerals:

100 image forming apparatus

110 radiation source

120 detector

130 driving mechanism

140 detection device

150 controller

200 are illuminated the object.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., as in "side wall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.

Fig. 2 is a schematic structural diagram of an image forming apparatus 100 according to an embodiment of the present disclosure.

As shown in fig. 2, imaging apparatus 100 may include a source 110, a detector 120, a drive mechanism 130, a detection device 140, and a controller 150.

The source 110 is used to emit X-rays toward the object 200 to be irradiated. As an example, the X-ray may be a pulsed X-ray or a high power pulsed X-ray, where pulsed X-ray refers to an X-ray with a switching time, and a high power pulsed X-ray is an X-ray with a high energy and a short switching time. In an alternative embodiment of the present disclosure, the X-rays emitted by the source 110 include various types of X-rays, such as cone beam X-rays. The source 110 can be controlled to emit X-rays and can be controlled to stop emitting X-rays.

The irradiation object 200 may be an oral tooth of a human body or the like, and the imaging device may be a CBCT system.

The detector 120 is used to receive X-rays that pass through the irradiated object 200 to generate an X-ray image. Wherein the detector 120 may be a two-dimensional area detector. For example, the detector 120 may be a flat panel detector. The detector 120 can be controlled to receive X-rays and to stop receiving X-rays.

The source 110 and detector 120 may be located on either side of the object 200 being irradiated. And the source 110 emits X-rays to irradiate the irradiated object 200, and the detector 120 receives the X-rays passing through the irradiated object 200, thereby generating an X-ray image, and the X-ray image may be stored or transmitted to an external computer device in real time.

The driving mechanism 130 can drive the source 110 and the detector 120 to move relative to the object 200, or can drive the object 200 to move relative to the source 110 and the detector 120.

In the case where the drive mechanism 130 drives the source 110 and the detector 120 to move relative to the object 200 to be irradiated, the source 110 and the detector 120 may be provided in the same drive mechanism. The source 110 and the detector 120 are disposed on both sides of the object 200 to be measured, and the source 110 and the detector 120 are moved together relative to the object 200 to be irradiated by the driving mechanism.

In addition, the source 110 and the detector 120 may be disposed on two independent driving mechanisms, and the movement of the source 110 relative to the irradiated object 200 and the movement of the detector 120 relative to the irradiated object 200 may be controlled by the two driving mechanisms, respectively.

In the case where the drive mechanism 130 drives the subject 200 to move relative to the source 110 and the detector 120, the subject 200 may be carried by a carrying platform, and the carrying platform may be provided in the same drive mechanism. The source 110 and the detector 120 are disposed on both sides of the object 200 to be measured, and the object 200 to be irradiated is moved relative to the source 110 and the detector 120 by the driving mechanism.

The detection device 140 is used to obtain a plurality of positions of the source 110 and the detector 120 relative to the object 200 to be irradiated during the relative movement. The detection device 140 may be a device that measures the changed position in real time.

Controller 150 controls source 110 to emit X-rays and detector 120 to receive X-rays based on each of the plurality of varying positions measured by detection device 140.

Controller 150 may be connected to detection device 140, source 110, and detector 120 by wires or wirelessly, for example, controller 150 may be connected to detection device 140 and source 110 and detector 120 by cables.

According to one embodiment of the present disclosure, controller 150 may control emission of X-rays by source 110 according to a plurality of varying positions. For example, when moving to the first changing position, the controller 150 controls the source 110 to emit X-rays, when moving to the next changing position, the controller 150 controls the source 110 to emit X-rays again, … …, until moving to the last changing position, the controller 150 controls the source 110 to emit X-rays, thereby completing the photographing of the irradiated object.

The controller 150 may also control the detector 120 to receive X-rays according to the plurality of varying positions. For example, when moving to the first changing position, the controller 150 controls the detector 120 to receive the X-rays, when moving to the next changing position, the controller 150 again controls the detector 120 to receive the X-rays, … …, until moving to the last changing position, the controller 150 controls the detector 120 to receive the X-rays, thereby completing the photographing of the irradiated object.

According to an embodiment of the present disclosure, the plurality of positions detected by the detecting device 140 may be compared with corresponding preset positions, and when the two positions are consistent or have a small error, the controller 150 controls the source 110 to emit X-rays and/or controls the detector 120 to receive X-rays.

For example, when moving to the first changing position, the first changing position is compared with the first preset position, if they are consistent, the controller 150 controls the source 110 to emit X-rays, when continuing to move to the second changing position, the second changing position is compared with the second preset position, if they are consistent, the controller 150 controls the source 110 to emit X-rays again, … …, until moving to the last changing position, the last changing position is compared with the last preset position, if they are consistent, the controller 150 controls the source 110 to emit X-rays, thereby completing the photographing of the irradiated object.

If the controller 150 needs to control the detector 120, the principle is the same as that of the source 110, and will not be described here.

In the present disclosure, the emission of X-rays by the source 110 may be controlled at each of the above-described variation positions or each of the variation positions after the comparison, and the emission of X-rays by the source 110 may be caused to stop after a predetermined time (e.g., after one exposure time). The next change position is then reached and the source 110 emits X-rays again.

Taking the example of the movement of the source 110 and the detector 120 as an example, the source 110 and the detector 120 may perform a relative movement according to a preset path, the preset path being a path between a start position to a stop position of the relative movement, and the preset path is divided into a plurality of photographing periods, and the corresponding preset measurement position is determined based on each photographing period such that a time of passing two adjacent preset measurement positions is taken as one photographing period. The time required to pass each capture cycle is greater than or equal to one exposure time of the source 110.

After the entire preset path motion is completed, the radiographic image received by the detector 120 is reconstructed to generate an image of the illuminated object.

According to another embodiment of the present disclosure, the driving device drives the radiation source and the detector to rotate or drives the carrying platform carrying the irradiated object to rotate. The driving mechanism 130 may be a rotating mechanism, and the rotating mechanism drives the radiation source 110 and the detector 120 to rotate around the irradiated object 200 or the rotating mechanism drives the carrying platform to rotate so that the irradiated object rotates relative to the radiation source and the detector. The rotation of the source and detector will be described as an example

The detection means 140 is arranged to measure a current angle of rotation of the rotation mechanism as an indication of the changed position, and the controller is arranged to control the source to emit X-rays and the detector to receive X-rays based on the current angle of rotation.

Accordingly, the detecting device 140 is an angle measuring device by which the current positions of the source 110 and the detector 120 are obtained when the source 110 and the detector 120 rotate around the irradiated object 200. Such as the angle of rotation relative to the starting position.

As one implementation form, the rotating mechanism may include a floor-type rotating mechanism (i.e., a vertical rotating mechanism) and a suspension arm rotating mechanism, but the rotating mechanism of the present disclosure is not limited thereto.

In other embodiments, the rotation mechanism may be in any other suitable form, for example, the source 110 and the detector 120 may be disposed on the same rotation mechanism, and the source 110 and the detector 120 may be disposed on different rotation mechanisms, respectively, to allow the source 110 and the detector 120 to rotate around the object to be irradiated.

According to at least one embodiment of the present disclosure, the detecting device 140 may be implemented by a photoelectric angle encoder and/or a rotary transformer; and preferably, an angle measuring device is provided to the rotating mechanism for detecting a rotating angle of the rotating shaft of the rotating mechanism, so as to obtain the rotating angle of the current positions of the source 110 and the detector 120 relative to the initial position by a difference between the current position of the rotating mechanism (e.g., the rotating shaft of the rotating mechanism) detected by the angle measuring device relative to the initial position of the rotating mechanism.

In the present disclosure, the controller 150 is configured to control the source 110 or the detector 120, for example to control the source on and off, or to control the detector 120 to receive data and stop receiving data.

When the controller 150 receives the current positions of the source 110 and the detector 120 detected by the detection device 140, the current positions of the source 110 and the detector 120 are compared with the preset angle, when the current positions of the source 110 and the detector 120 and the preset angle satisfy certain conditions, the controller 150 controls the source 110 to emit the radiation, and after a predetermined time, the source 110 stops emitting the radiation to obtain a radiographic image at the current preset position.

In this disclosure, the detector 120 may store the generated radiographic image or transmit it to a computing device in real-time.

The setting of the preset angle of the present disclosure may be achieved by equally dividing the angle between the start position and the stop position of the rotation of the rotating mechanism into a plurality of photographing periods.

That is, the angle difference between two adjacent preset angles is the same, and the angle difference between the adjacent preset angles is the shooting period.

Of course, the angle between the starting position and the stop position of the rotation of the rotary mechanism can also be distributed unequally, so that the angle difference between at least one adjacent preset angle is different from the angle difference between the other adjacent preset angles.

As an implementation form, when the rotating mechanism rotates and makes the source 110 and the detector 120 rotate one circle (360 °) around the irradiated object 200, the shooting period may be 0.5 degrees, 1 degree, 2 degrees, etc., and the selection of the shooting period depends on the rotating speed of the rotating mechanism and the parameters of the source 110.

In an alternative embodiment of the present disclosure, the preset position is at a start position of each photographing period, for example, when the photographing period is 1 degree, the preset position may be determined as 1 degree, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 6 degrees, …, 355 degrees, 356 degrees, 357 degrees, 358 degrees, 359 degrees, 360 degrees. Thus, the controller 150 may control the source 110 to emit X-rays when the detecting device 140 measures a rotation angle of 1 degree, 2 degrees, 3 degrees, 4 degrees, 5 degrees, 6 degrees, … degrees, 355 degrees, 356 degrees, 357 degrees, 358 degrees, 359 degrees, 360 degrees. Those skilled in the art will appreciate that the above described capture cycles are merely illustrative and the present disclosure is not limited thereto.

P31-P33 are several positions of the image forming apparatus during scanning according to the exemplary embodiment of the present disclosure: p31 is the initial position; p32 is the uniform motion start position; p33 is the start deceleration position.

Wherein, S31-S33 are several stages of the imaging device in the scanning process:

s31, the image forming apparatus starts accelerating.

And S32, the imaging device reaches P32 and rotates to P33 at a constant speed.

S33, the image forming apparatus starts decelerating and stops moving to the P31 initial position.

In each phase, several cycles may be divided, and at the start of each cycle the source may be controlled to emit radiation and/or the detector to receive radiation.

In an alternative embodiment of the present disclosure, the time required for the source 110 and the detector 120 to move from the current preset angle to the next preset angle is greater than or equal to the time for one exposure of the source 110.

For example, when the photographing period is 1 degree, the shortest time when the rotation mechanism rotates by 1 degree is longer than or equal to the time for one exposure of the source 110, for example, equal to or slightly longer than the time for one exposure of the source 110. In this way, the angle that the rotating mechanism travels when the source 110 is exposed once can be considered approximately equal to the imaging period, that is, the angle that the rotating mechanism travels when the source 110 is exposed once can be considered the same, so that the data of the X-rays generated by the detector can be reconstructed to generate an image.

Thus, the imaging device according to exemplary embodiments of the present disclosure works less efficiently than existing X-ray imaging devices, thereby reducing patient waiting times.

In the present disclosure, the controller 150 may control the detector 120 to transmit the generated radiographic image. In certain exemplary embodiments, for example, after each exposure of the source 110 is completed, the controller 150 may control the detector 120 to send the generated radiographic image to a memory or computing device. The controller 150 may be connected to the probe 120 by wire or wirelessly. In some examples, the controller 150 may be connected to the probe 120 via a cable.

Fig. 4 is a flowchart of an imaging method S100 according to an embodiment of the present disclosure.

The imaging method may be implemented using the imaging apparatus described above, which includes the following steps.

And S102, driving the radiation source 110 and the detector 120 to move along a preset route through the driving mechanism 130.

S104, detecting the changing position of the source 110 and the detector 120 relative to the irradiated object.

And S106, controlling the source 110 and the detector 120 based on the changed positions. Wherein the source 110 is used to emit radiation to the irradiated object 200; the detector 120 is configured to receive radiation that has passed through the irradiated object 200 to generate a radiographic image.

In an alternative embodiment of the present disclosure, the driving mechanism 130 driving the source 110 and the detector 120 to move along the predetermined path 300 includes:

the drive mechanism 130 drives the source 110 and the detector 120 to rotate around the object 200 to be irradiated.

Fig. 5 is a flowchart of an imaging method S200 according to one embodiment of the present disclosure.

And S202, driving the radiation source 110 and the detector 120 to move along a preset route through the driving mechanism 130.

S204, detecting the changed positions of the source 110 and the detector 120 relative to the irradiated object.

S206, comparing whether the change position is consistent with the preset position, if so, proceeding to step S208, and controlling the source 110 and the detector 120 based on the change position, wherein the source 110 is used for emitting rays to the irradiated object 200, and the detector 120 is used for receiving the rays passing through the irradiated object 200 to generate a radiographic image. If not, then step S210 is entered and the source 110 and detector 120 are not operated.

In an alternative embodiment of the present disclosure, the driving mechanism 130 driving the source 110 and the detector 120 to move along the predetermined path 300 includes: the driving mechanism 130 drives the source 110 and the detector 120 to rotate around the object 200 to be irradiated, or drives the object 200 to rotate around the source 110 and the detector 120.

Furthermore, according to a further embodiment of the present disclosure, an imaging method is also provided. Fig. 6 shows an imaging method S300 according to this embodiment (illustrated with the source and detector rotated as an example).

In step S302, the rotation circle is divided into a plurality of shooting periods, and the angular position of each shooting period is calculated. In step S304, the source and detector are controlled to rotate. In step S306, a shooting cycle is set to start. In step S308, angular position information is detected by the detection device. In step S310, the start position of the cycle is determined by the measured angular position information and the preset angular position information, and if the information is consistent, the process proceeds to step S312, and the radiation source emits X-rays. Meanwhile, in step S314, the detector receives X-rays. If the information is not consistent, that is, not the cycle start position, it is determined in step S316 whether it is the cycle end position, and if not, the process proceeds to step S308. If the position is the end of the period, the procedure proceeds to step S318, where the emission of X-rays and/or the detection of X-rays is stopped. And in step S320, it is determined whether the photographing period is ended.

Thereafter, in step S322, it is determined whether all the shooting periods have ended, and if not, it proceeds to step S306 to perform shooting again.

If all the shooting periods are determined to be finished, the process proceeds to step S324, where the rotation is stopped and the shooting is stopped.

According to the technical scheme of the disclosure, shooting can be performed even in the acceleration stage and the deceleration stage of the equipment, so that the working time is shortened, the use experience is improved, and the like.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

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 at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. An image forming apparatus, characterized by comprising:

a source for emitting X-rays toward an object to be irradiated;

2. The imaging apparatus of claim 1, wherein the controller controls the source to emit X-rays and controls the detector to receive the X-rays when the measured change position coincides with a preset measurement position.

3. The imaging apparatus according to claim 2, wherein the relative movement is performed in accordance with a preset path which is a path between a start position to a stop position of the relative movement, and the preset path is divided into a plurality of shooting cycles, and the corresponding preset measurement position is determined on a per shooting cycle basis such that a time when two adjacent preset measurement positions are passed is taken as one shooting cycle.

4. The imaging apparatus of claim 1, wherein the time required to pass each capture cycle is greater than or equal to one exposure time of the source;

optionally, the driving device drives the radiation source and the detector to rotate, or drives a carrying platform carrying the irradiated object to rotate;

optionally, the driving mechanism is a rotating mechanism, and the rotating mechanism drives the radiation source and the detector to rotate around the irradiated object or the rotating mechanism drives the carrying platform to rotate so that the irradiated object rotates relative to the radiation source and the detector.

5. The imaging apparatus of claim 1, wherein the detection device is to measure a current angle of rotation of the rotating mechanism as the indication of the changed position, and the controller is to control the source to emit X-rays and the detector to receive the X-rays based on the current angle of rotation;

optionally, when the measured current rotation angle is consistent with a preset measurement angle, the controller controls the radiation source to emit X-rays and controls the detector to receive the X-rays.

6. The imaging apparatus according to claim 1, wherein an angle between a start position to a stop position of the rotation mechanism is divided into a plurality of photographing periods, and a corresponding preset measurement angle is determined on the basis of each photographing period such that a time when two adjacent preset measurement angles pass is taken as one photographing period.

7. The imaging apparatus of claim 1, wherein the time required to pass each capture cycle is greater than or equal to one exposure time of the source;

optionally, the angle between the start position and the stop position of the rotating mechanism is equally divided into a plurality of shooting periods;

optionally, the detection device is a photoelectric angle encoder or a rotary transformer;

optionally, completing the shooting of the irradiated object through a circle of rotation;

optionally, the one rotation circle comprises a rotation acceleration stage, a rotation uniform speed stage and a rotation deceleration stage;

optionally, the X-rays are pulsed X-rays, optionally high power pulsed X-rays.

8. An imaging method of imaging by the imaging apparatus according to any one of claims 1 to 7, characterized by comprising:

9. The imaging method of claim 8, wherein it is determined whether the changed position coincides with a preset measurement position, and if so, the controller controls the source to emit X-rays and the detector to receive the X-rays;

optionally, the relative movement is performed along a preset path, the preset path is a path from a starting position to a stopping position of the relative movement, the preset path is divided into a plurality of shooting periods, and a corresponding preset measurement position is determined based on each shooting period so that a time of passing two adjacent preset measurement positions is taken as one shooting period;

optionally, the time required to pass each capture cycle is greater than or equal to one exposure time of the source;

optionally, the radiation source and the detector are driven by the driving device to rotate, or a carrying platform carrying the irradiated object is driven by the driving device to rotate;

optionally, a current rotation angle measured by the detection device is used as the indication of the changed position, and the controller controls the source to emit X-rays and controls the detector to receive the X-rays based on the current rotation angle;

optionally, when the measured current rotation angle is consistent with a preset measurement angle, the controller controls the radiation source to emit X-rays and controls the detector to receive the X-rays;

alternatively, the angle between the start rotational position to the stop rotational position is divided into a plurality of photographing periods, and the corresponding preset measurement angle is determined on the basis of each photographing period such that the time of passing two adjacent preset measurement angles is one photographing period;

optionally, the time required to pass each capture cycle is greater than or equal to one exposure time of the source.

10. The imaging method according to claim 8, wherein the angle between the start rotational position to the stop rotational position is averaged over a plurality of photographing periods;

optionally, the X-rays are pulsed X-rays, optionally high power pulsed X-rays.