CN110840477A - Scanning method, scanning device, computer equipment and computer readable storage medium - Google Patents
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Abstract
The application relates to a scanning method, a device, a computer device and a computer readable storage medium, wherein the scanning method comprises the steps of adjusting the single-view maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator so that the single-view maintaining time is an integral multiple of the high-frequency ripple period; and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system. According to the scanning method, the single-view maintaining time is controlled to be integral multiple of the high-frequency ripple period, and the consistency of high-frequency ripple waveforms in different single views is guaranteed, so that the requirement of a CT system on voltage high-frequency ripples can be reduced on the premise of not influencing the imaging effect of the system, and the power density of a high-voltage generator is improved.
Description
Technical Field
The present invention relates to the medical field, and in particular, to a scanning method, an apparatus, a computer device, and a computer-readable storage medium.
Background
In the imaging process of the CT system, the high-voltage generator drives the bulb tube to generate X-rays with certain intensity, the X-rays penetrate through a scanned object and are attenuated, and the attenuated X-rays are collected by the detector. Each scan cycle of the CT system is divided into hundreds to thousands of fields of view, each corresponding to a certain scan angle. The system integrates the signals acquired by the detectors in each field of view to obtain scanning data of corresponding angles, and then images the scanned object by methods such as filtered back projection or iterative reconstruction. The X light intensity emitted from the bulb tube is related to the output voltage (kV) and the current (mA) when the high-voltage generator drives the bulb tube to work, and the high-frequency ripple of the output voltage can influence the stability of the emitted X light intensity, so that the imaging of a system is influenced.
Disclosure of Invention
The application provides a scanning method, a scanning device, computer equipment and a computer readable storage medium, which can reduce the influence of high-frequency ripples on CT system imaging, thereby reducing the requirement of a CT system on the high-frequency ripples.
A method of scanning, the method comprising:
adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator so as to enable the single-view field maintaining time to be integral multiples of the high-frequency ripple period;
and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
In one embodiment, the adjusting the single-field-of-view sustain time of the scanning system and/or the high-frequency ripple period of the high-voltage generator comprises:
acquiring the single-view maintenance time of the scanning system;
and adjusting the switching frequency of the high-voltage generator according to the single-view maintaining time so as to enable the single-view maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the adjusting the single-field-of-view sustain time of the scanning system and/or the high-frequency ripple period of the high-voltage generator comprises:
acquiring a switching period signal of the high-voltage generator, and acquiring a high-frequency ripple period of the high-voltage generator according to the switching period signal;
and adjusting the single-view field maintaining time of the scanning system according to the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the adjusting the single-field-of-view maintenance time of the scanning system according to the high-frequency ripple period of the high-voltage generator comprises:
and adjusting the rotating speed of the scanning system frame according to the high-frequency ripple period so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the adjusting the single-field-of-view maintenance time of the scanning system according to the high-frequency ripple period of the high-voltage generator comprises:
and adjusting the total visual field number of each circle scanned by the scanning system according to the high-frequency ripple period so as to enable the single visual field maintaining time to be integral multiple of the high-frequency ripple period.
In an embodiment, the method further comprises:
and decoupling the modulation mode of the high-voltage generator from the switching frequency so that the modulation mode of the high-voltage generator is independent of the switching frequency.
In one embodiment, the modulation mode of the high voltage generator comprises pulse amplitude modulation and pulse width modulation.
A scanning apparatus, the apparatus comprising:
the adjusting module is used for adjusting the single-view field maintaining time of the scanning system and/or the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period;
and the scanning module is used for scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the above method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.
The scanning method, the scanning device, the computer equipment and the computer readable storage medium provided by the embodiment of the application comprise the steps of adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator, so that the single-view field maintaining time is integral multiple of the high-frequency ripple period; and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system. According to the scanning method, the single-view maintaining time is controlled to be integral multiple of the high-frequency ripple period, and the consistency of high-frequency ripple waveforms in different single views is guaranteed, so that the requirement of a CT system on voltage high-frequency ripples can be reduced on the premise of not influencing the imaging effect of the system, and the power density of a high-voltage generator is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a scanning method according to an embodiment;
FIG. 2 is a diagram illustrating the sustain time for each single field during the scanning process according to an embodiment;
FIG. 3 is a diagram illustrating high frequency ripple in different single views according to an embodiment;
FIG. 4 is a block diagram of a scanning device according to an embodiment;
FIG. 5 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
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. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
A Computed Tomography (CT) apparatus typically includes a gantry, a couch, and a console for operation by a physician. One side of the frame is provided with a bulb tube, and the side opposite to the bulb tube is provided with a detector. The console is a computer device for controlling the bulb tube and the detector to scan, and the computer device is also used for receiving data collected by the detector, processing and reconstructing the data and finally forming a CT image. When CT is used for scanning, a patient lies on a scanning bed, the scanning bed sends the patient into the aperture of a stand, a bulb tube arranged on the stand emits X rays, the X rays penetrate through the patient and are received by a detector to form data, the data are transmitted to computer equipment, and the computer equipment carries out primary processing and image reconstruction on the data to obtain a CT image.
Fig. 1 is a flowchart of a scanning method according to an embodiment, and as shown in fig. 1, the scanning method includes steps 110 and 120, where:
step 110, adjusting the single-view field maintaining time of the scanning system and/or the high-frequency ripple period of the high-voltage generator, so that the single-view field maintaining time is an integral multiple of the high-frequency ripple period.
The scanning system comprises a machine frame, a scanning frame, a bulb tube, a high-voltage generator and a detector, wherein the bulb tube, the high-voltage generator and the detector are fixed on the scanning frame, and the scanning frame is rotatably arranged on the machine frame. The high-voltage generator drives the bulb tube to generate X-rays with certain intensity, the X-rays penetrate through a scanned object and are attenuated, the attenuated X-rays are collected by the detector, and imaging is carried out according to collected data. Each circle of scanning range of the scanning system is divided into hundreds to thousands of visual fields, each visual field corresponds to a certain scanning angle, scanning is carried out within each visual field for a certain time, and data obtained by scanning are collected by a detector. And integrating the signals acquired by the detectors in each field of view to obtain scanning data of corresponding scanning angles, and reconstructing the scanning data by methods such as filtering back projection or iterative reconstruction to obtain a reconstructed image. With the rotation of the scanning system frame, the maintenance time of the (n-1) th, the (n) th and the (n + 1) th single-view fields of a certain circle of scanning is respectively delta tn-1, delta tn and delta tn +1, as shown in figure 2. Since the accuracy and stability of the rotational angular velocity of the gantry can be made very high, Δ tn-1, Δ tn +1 in fig. 2 are all approximately equal to the expected value Δ t, further considering the inertia of the mechanical rotation, the difference between the maintenance times of two adjacent single fields can be ignored.
Conventionally, the high-frequency ripple period and the single-view holding time have no correlation, and the high-frequency ripple difference in different single views may be large, so that the ripple integral value in different single-view times is unstable, thereby affecting the stability of the emitted X-ray intensity. Referring to fig. 3, the high-frequency ripples in the first single-VIEW 1 and the second single-VIEW 2 have poor consistency, and the integral value of the high-frequency ripples in the first single-VIEW 1 and the second single-VIEW 2 may be unstable. In order to make the unstable integral value not affect the imaging of the system, the absolute value of the integral value must be small enough to control the X-ray intensity fluctuation in different single fields of view not to affect the imaging of the scanning system, and the requirement on high-frequency ripple is high.
The single-view field maintaining time of the scanning system and/or the high-frequency ripple period of the high-voltage generator are/is adjusted, so that the single-view field maintaining time is integral multiple of the high-frequency ripple period, and the single-view field maintaining time can be 1 time, 2 times, 3 times and the like of the high-frequency ripple period. Specifically, the high-frequency ripple period of the high-voltage generator can be controlled to be fixed, and the single-view field maintaining time of the scanning system is independently adjusted, so that the single-view field maintaining time is always kept in an integral multiple relation with the high-frequency ripple period; or, controlling the single-view maintenance time of the scanning system to be fixed, and independently adjusting the high-frequency ripple period of the high-voltage generator to keep the high-frequency ripple period of the high-voltage generator in an integral multiple relation with the single-view maintenance time; or simultaneously adjusting the single-view maintaining time and/or the high-frequency ripple period of the high-voltage generator so that the single-view maintaining time is an integral multiple of the high-frequency ripple period. The specific adjustment method is not limited in this embodiment, as long as the single-view maintaining time is ensured to be an integral multiple of the high-frequency ripple period.
It should be noted that each single-field hold time is the same for the same scan. For different scanning times, the single-view field maintaining time can be different, as long as it is ensured that the single-view field maintaining time is different integral multiples of the high-frequency ripple period in the scanning process. For example, during the first scanning, the single-field maintaining time is 2 times of the high-frequency ripple period of the high-voltage generator, and during the second scanning, the single-field maintaining time is 3 times of the high-frequency ripple period of the high-voltage generator.
And step 120, scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
The scanning method provided by the embodiment of the application comprises the steps of adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator, so that the single-view field maintaining time is integral multiple of the high-frequency ripple period; and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system. The scanning method provided by the application is an integral multiple of a high-frequency ripple period by controlling the single-view field maintaining time, so that high-frequency ripples in each single view field can keep better consistency, ripple integral values in different single-view field time are stable, and even if a high-voltage generator outputs relatively high-frequency ripples, the imaging quality cannot be influenced. The requirements of the CT system on high-frequency voltage ripples can be reduced on the premise of not influencing the imaging effect of the system, and the power density of the high-voltage generator is improved.
In one embodiment, adjusting the single field-of-view hold time of the scanning system and/or the high-frequency ripple period of the high-voltage generator comprises:
and acquiring the single-view maintenance time of the scanning system.
Since the single-view duration of the scanning system is not fixed but adjustable, the high voltage generator needs the scanning system to inform the single-view duration currently used in advance.
And adjusting the switching frequency of the high-voltage generator according to the single-view field maintaining time so as to enable the single-view field maintaining time to be integral multiples of the high-frequency ripple period.
The switching frequency refers to the switching frequency of an inverter switch in a high-voltage generator, for a traditional high-voltage generator, the high-frequency ripple period output by the high-voltage generator is 1 or 0.5 inverter switching period, so that the high-frequency ripple period is one or two times of the switching frequency, which is determined by a power electronic converter, if the inversion of the high-voltage generator is symmetric control, the output ripple period is theoretically two times of the switching period, and the high-frequency ripple waveforms output in different switching periods are always the same no matter what control method, so the period of the high-frequency ripple can be adjusted by adjusting the inverter switching frequency. In this embodiment, the high-frequency ripple period is adjusted by adjusting the switching frequency of the high-voltage generator in combination with the relationship between the high-frequency ripple period output by the high-voltage generator and the switching frequency of the high-voltage generator, so that the single-field maintaining time is an integral multiple of the high-frequency ripple period.
In one embodiment, adjusting the single field-of-view hold time of the scanning system and/or the high-frequency ripple period of the high-voltage generator comprises:
acquiring a switching period signal of the high-voltage generator, and acquiring a high-frequency ripple period of the high-voltage generator according to the switching period signal;
and adjusting the single-view field maintaining time of the scanning system according to the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
The switching period signal of the high-voltage generator and the high-frequency ripple period of the high-voltage generator have a corresponding relation, for different high-voltage generators, the high-frequency ripple period is integral multiple of the switching period or integral multiple of half switching period, and after the switching period signal of the high-voltage generator is obtained, the high-frequency ripple period of the high-voltage generator can be obtained through calculation. After the high-frequency ripple period is obtained, only the single-view maintaining time of the scanning system is adjusted, so that each single-view maintaining time is integral multiple of the high-frequency ripple period.
Specifically, the rotation speed of the scanning system frame can be adjusted according to the high-frequency ripple period, so that the single-view field maintaining time is an integral multiple of the high-frequency ripple period. It will be appreciated that the faster the gantry rotates, the shorter the single field of view dwell time, and the slower the gantry rotates, the longer the single field of view dwell time. The rotating speed of the scanning system frame is adjusted to the target rotating speed, so that the single visual field maintaining time can be integral multiple of the high-frequency ripple period by scanning at the target rotating speed.
In one embodiment, the total number of fields of view of each scanning cycle of the scanning system is adjusted according to the high-frequency ripple period, so that the single-field maintaining time is an integral multiple of the high-frequency ripple period.
If the rotating speed of the frame is fixed, the more the total field of view of each scanning circle is, the shorter the single field maintaining time is, and the less the total field of view of each scanning circle is, the longer the single field maintaining time is. In this embodiment, the single-view duration can be controlled to be an integral multiple of the high-frequency ripple period by adjusting the total number of views scanned by the scanning system for each circle.
It should be noted that the single-field maintaining time, the total number of fields of view per scan cycle, and the gantry rotation speed all need to meet the imaging requirements of the system.
In one embodiment, the scanning method further comprises:
and decoupling the modulation mode of the high-voltage generator from the switching frequency so that the modulation mode of the high-voltage generator is independent of the switching frequency.
In one embodiment, the modulation mode of the high voltage generator comprises pulse amplitude modulation and pulse width modulation,
the decoupling is to use no modulation mode of frequency conversion, such as pulse amplitude modulation or pulse width modulation, which can adjust the output of the high voltage generator according to the requirement of the scanning system without frequency conversion. If the modulation mode of the high-voltage generator makes the switching frequency change constantly, the high ripple period can change constantly, and the integral multiple relation between the single-view field maintaining time and the high ripple period cannot be guaranteed. The embodiment can make the modulation mode and the switching frequency of the high-voltage generator independent from each other by decoupling the correlation between the modulation mode and the switching frequency of the high-voltage generator, thereby ensuring that the high-ripple period is prevented from being influenced by other aspects in the scanning process, and ensuring the integral multiple relation between the single-view field maintaining time and the high-frequency ripple period.
It should be understood that, although the steps in the flowchart of fig. 1 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 1 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 4, there is provided a scanning apparatus including: an adjustment module 410 and a scanning module 420, wherein:
the adjusting module 410 is configured to adjust a single-field maintaining time of the scanning system and/or a high-frequency ripple period of the high-voltage generator, so that the single-field maintaining time is an integer multiple of the high-frequency ripple period.
And the scanning module 420 is configured to scan the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-field maintaining time of the scanning system.
In one embodiment, the adjusting module 410 is used for acquiring a single-view maintaining time of the scanning system;
and adjusting the switching frequency of the high-voltage generator according to the single-view field maintaining time so as to enable the single-view field maintaining time to be integral multiples of the high-frequency ripple period.
In an embodiment, the adjusting module 410 is configured to obtain a switching period signal of the high voltage generator, and obtain a high-frequency ripple period of the high voltage generator according to the switching period signal;
and adjusting the single-view field maintaining time of the scanning system according to the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In an embodiment, the adjusting module 410 is configured to adjust the rotation speed of the scanning system frame according to the high-frequency ripple period, so that the single-view duration is an integer multiple of the high-frequency ripple period.
In an embodiment, the adjusting module 410 is configured to adjust the total number of views scanned by the scanning system for each circle according to the high-frequency ripple period, so that the single-view duration is an integer multiple of the high-frequency ripple period.
In an embodiment, the scanning apparatus further includes a decoupling module (not shown in the figure) for decoupling the modulation mode of the high voltage generator from the switching frequency, so that the modulation mode of the high voltage generator is independent from the switching frequency.
In one embodiment, the modulation modes of the high voltage generator include pulse amplitude modulation and pulse width modulation.
The scanning device provided by the embodiment of the application comprises an adjusting module 410 and a scanning module 420, wherein the adjusting module 410 is used for adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator, so that the single-view field maintaining time is an integral multiple of the high-frequency ripple period; the scanning module 420 is configured to scan the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view maintaining time of the scanning system. The scanning device provided by the application guarantees the consistency of high-frequency ripple waveforms in different single fields of view by controlling the single-field maintaining time to be the integral multiple of a high-frequency ripple period, so that the requirement of a CT system on voltage high-frequency ripples can be reduced on the premise of not influencing the imaging effect of the system, and the power density of a high-voltage generator is improved.
For the specific definition of the scanning device, reference may be made to the above definition of the scanning method, which is not described herein again. The modules in the scanning device can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 5. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a scanning method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 5 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator so as to enable the single-view field maintaining time to be integral multiples of the high-frequency ripple period;
and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the single-view maintenance time of the scanning system;
and adjusting the switching frequency of the high-voltage generator according to the single-view maintaining time so as to enable the single-view maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring a switching period signal of the high-voltage generator, and acquiring a high-frequency ripple period of the high-voltage generator according to the switching period signal;
and adjusting the single-view field maintaining time of the scanning system according to the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and adjusting the rotating speed of the scanning system frame according to the high-frequency ripple period so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and adjusting the total visual field number of each circle scanned by the scanning system according to the high-frequency ripple period so as to enable the single visual field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and decoupling the modulation mode of the high-voltage generator from the switching frequency so that the modulation mode of the high-voltage generator is independent of the switching frequency.
In one embodiment, the modulation modes of the high voltage generator include pulse amplitude modulation and pulse width modulation.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator so as to enable the single-view field maintaining time to be integral multiples of the high-frequency ripple period;
and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the single-view maintenance time of the scanning system;
and adjusting the switching frequency of the high-voltage generator according to the single-view maintaining time so as to enable the single-view maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring a switching period signal of the high-voltage generator, and acquiring a high-frequency ripple period of the high-voltage generator according to the switching period signal;
and adjusting the single-view field maintaining time of the scanning system according to the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and adjusting the rotating speed of the scanning system frame according to the high-frequency ripple period so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and adjusting the total visual field number of each circle scanned by the scanning system according to the high-frequency ripple period so as to enable the single visual field maintaining time to be integral multiple of the high-frequency ripple period.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and decoupling the modulation mode of the high-voltage generator from the switching frequency so that the modulation mode of the high-voltage generator is independent of the switching frequency.
In one embodiment, the modulation modes of the high voltage generator include pulse amplitude modulation and pulse width modulation.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of scanning, the method comprising:
adjusting the single-view field maintaining time of a scanning system and/or the high-frequency ripple period of a high-voltage generator so as to enable the single-view field maintaining time to be integral multiples of the high-frequency ripple period;
and scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
2. The method of claim 1, wherein adjusting a single field-of-view hold time of a scanning system and/or a high-frequency ripple period of a high voltage generator comprises:
acquiring the single-view maintenance time of the scanning system;
and adjusting the switching frequency of the high-voltage generator according to the single-view maintaining time so as to enable the single-view maintaining time to be integral multiple of the high-frequency ripple period.
3. The method of claim 1, wherein adjusting a single field-of-view hold time of a scanning system and/or a high-frequency ripple period of a high voltage generator comprises:
acquiring a switching period signal of the high-voltage generator, and acquiring a high-frequency ripple period of the high-voltage generator according to the switching period signal;
and adjusting the single-view field maintaining time of the scanning system according to the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
4. The method of claim 3, wherein adjusting the single field-of-view maintenance time of the scanning system according to the high-frequency ripple period of the high-voltage generator comprises:
and adjusting the rotating speed of the scanning system frame according to the high-frequency ripple period so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period.
5. The method of claim 3, wherein adjusting the single field-of-view maintenance time of the scanning system according to the high-frequency ripple period of the high-voltage generator comprises:
and adjusting the total visual field number of each circle scanned by the scanning system according to the high-frequency ripple period so as to enable the single visual field maintaining time to be integral multiple of the high-frequency ripple period.
6. The method of claim 2, further comprising:
and decoupling the modulation mode of the high-voltage generator from the switching frequency so that the modulation mode of the high-voltage generator is independent of the switching frequency.
7. The method of claim 6,
the modulation modes of the high-voltage generator comprise pulse amplitude modulation and pulse width modulation.
8. A scanning device, characterized in that the device comprises:
the adjusting module is used for adjusting the single-view field maintaining time of the scanning system and/or the high-frequency ripple period of the high-voltage generator so as to enable the single-view field maintaining time to be integral multiple of the high-frequency ripple period;
and the scanning module is used for scanning the object to be scanned according to the high-frequency ripple period of the high-voltage generator and the single-view field maintaining time of the scanning system.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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