CN104473656A - Adjustable synchronous triggering acquiring system for CT device - Google Patents
Adjustable synchronous triggering acquiring system for CT device Download PDFInfo
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- CN104473656A CN104473656A CN201410629592.3A CN201410629592A CN104473656A CN 104473656 A CN104473656 A CN 104473656A CN 201410629592 A CN201410629592 A CN 201410629592A CN 104473656 A CN104473656 A CN 104473656A
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Abstract
The invention discloses an adjustable synchronous triggering acquiring system for a CT device. The adjustable synchronous triggering acquiring system for the CT device comprises a synchronous triggering time-sequence managing unit which is respectively connected with a ray source control unit, a data acquiring control unit, a communication coordinating module, an adjustable delaying mechanism and a rack encoder; the communication coordinating module is respectively connected with the ray source control unit and the data acquiring control unit. The adjustable synchronous triggering acquiring system for the CT device has the advantages that an exposure acquiring synchronizing mechanism can be simply adjusted to delay the acquiring and exposure time; the mounting is simple, the precision is relatively high, the design complexity of the system is reduced, and the data acquiring success rate can be raised.
Description
Technical field
The present invention relates to for carrying out synchronous Apparatus and system to emission source and collection terminal during CT device data acquisition, being specifically related to a kind of adjustable synchronous triggering collection system for CT equipment.
Background technology
Gather the critical system one of of synchro system as CT scanner, determine the validity and reliability that CT scanner finally obtains data, and the stability of system works.CT scanner radiographic source from send between ray to ray stable phase and have certain delay, this partial data will be dropped when data reconstruction, and this time delay aging used along with parts is variable.
Prior art passes through code-disc, zero hole and relevant Digital Logic realize exposing and data acquisition synchronous, the basic sequential that namely make zero hole and code-disc provide exposure and gather, and digital logic portion controls, exposure and data acquisition are carried out simultaneously, there is no Time delay control or adjustable part.
Current conventional scheme offsets this delay by increasing scanning distance or adjusting firmware program, and the first scheme has precision not enough, may cause the radiation dose of patient's hyperabsorption; First scheme needs to carry out firmware modification, and technological means is comparatively complicated.
Summary of the invention
The object of the invention is to overcome prior art Problems existing, a kind of adjustable synchronous triggering collection system for CT equipment is provided.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of adjustable synchronous triggering collection system for CT equipment, comprise synchronous activation schedule administrative unit, described synchronous activation schedule administrative unit is connected to radiographic source control unit, data collection control unit, communication-cooperation module, adjustable delay mechanism and rack encoder, described communication-cooperation module is also connected with described radiographic source control unit and described data collection control unit respectively.
Further, exposed pulse and acquisition pulse are determined respectively in other exposure position and the collection position of being provided with of described adjustable delay mechanism.
Further, described adjustable delay mechanism comprises catch and adjustable fixing hole, and described catch bottom is provided with described adjustable fixing hole.
Preferably, described adjustable delay mechanism and described rack encoder are individually fixed on the quartering position on described CT equipment rack.
Further, the fixed relationship of described adjustable delay mechanism and described rack encoder and described CT equipment rack is not limited to this one, only need meet mounting means and sequential generation requirement.
Beneficial effect of the present invention:
Adopt technical solution of the present invention, achieve and pass through tunable arrangement, synchronous triggering device basis sequential is provided, synchronous triggering device is according to basic sequential, generation work synchronous sequence, be distributed to ray control unit and data acquisition unit, ray control unit and data acquisition unit complete exposure by coordinating communication module and gather synchronous, and avoid carrying out data acquisition under tube current and the unstabilized state of tube voltage, if occur in gatherer process, any problem coordinating communication module all can interrupt x ray exposure x, ensure the stable of data acquisition, safety is with effective; Namely can gather lazy-tongs by simple adjustment exposure carry out to collection and time of exposure delays and regulate, it is higher to install simple precision, reduces system design complexity, raising data acquisition success rate.
Accompanying drawing explanation
Fig. 1 is adjustable delay structural scheme of mechanism of the present invention;
Fig. 2 is that frame of the present invention fixes schematic diagram;
Fig. 3 is system architecture schematic diagram of the present invention.
Number in the figure illustrates: 1, synchronous activation schedule administrative unit, 2, radiographic source control unit, 3, data collection control unit, 4, communication-cooperation module, 5, adjustable delay mechanism, 51, catch, 52, adjustable fixing hole, 6, rack encoder, 7, exposed pulse, 8, acquisition pulse.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Shown in Fig. 1-Fig. 3, a kind of adjustable synchronous triggering collection system for CT equipment, comprise synchronous activation schedule administrative unit 1, described synchronous activation schedule administrative unit 1 is connected to radiographic source control unit 2, data collection control unit 3, communication-cooperation module 4, adjustable delay mechanism 5 and rack encoder 6, described communication-cooperation module 4 is also connected with described radiographic source control unit 2 and described data collection control unit 3 respectively.
Further, other exposure position and the collection position of being provided with of described adjustable delay mechanism 5 determines exposed pulse 7 and acquisition pulse 8 respectively.
Further, described adjustable delay mechanism 5 comprises catch 51 and adjustable fixing hole 52, and described catch 51 bottom is provided with described adjustable fixing hole 52.
Preferably, described adjustable delay mechanism 5 and described rack encoder 6 are individually fixed on the quartering position on described CT equipment rack.
Further, described adjustable delay mechanism 5 and described rack encoder 6 are not limited to this one with the fixed relationship of described CT equipment rack, only need meet mounting means and sequential generation requirement.
Embodiment:
Postpone sequential measure and regulate:
Postponing sequential to be determined stabilization time by radiographic source, by measuring radiogenic regulating time, or consulting its user's manual its regulating time known t
p, adjustable delay mechanism 5 is r apart from frame geometric center distance, and frame angular velocity is ω, can calculate the catch 51 of adjustable delay mechanism 5 thus apart from L.
The linear velocity at catch 51 place:
v=ωr
T
pthe displacement of interior catch 51 is:
S=vt
p
As r>>L:
L≈S
Then can obtain the catch 51 of adjustable delay mechanism 5 apart from can approximate expression be:
L=ωrt
p
Exposure gathers sending of synchronous sequence:
Exposure position (exposed pulse 7) and collection position acquisition pulse 8 are determined in the slow-speed of revolution when starting self-inspection of CT frame, and the relativeness of they and count pulse.When entering scanning process, when exposure position and collection position send trigger impulse first, system flow performs as follows: exposure position produces exposed pulse by synchronous activation schedule administrative unit 1, control bulb exposes, gather position and produce acquisition pulse by synchronous activation schedule administrative unit 1, control data acquisition system carries out data acquisition.In running, synchronous activation schedule administrative unit 1 can count acquisition trigger pulse simultaneously, determine the effectiveness of image data, counting gathers position to exposing position respectively, and exposure position is to the acquisition trigger pulse gathered between position, if umber of pulse differs when reaching some with reference pulse number, think data failure, radiographic source is closed, count pulse locking, stops data acquisition.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the adjustable synchronous triggering collection system for CT equipment, it is characterized in that, comprise synchronous activation schedule administrative unit (1), described synchronous activation schedule administrative unit (1) is connected to radiographic source control unit (2), data collection control unit (3), communication-cooperation module (4), adjustable delay mechanism (5) and rack encoder (6), described communication-cooperation module (4) is also connected with described radiographic source control unit (2) and described data collection control unit (3) respectively.
2. the adjustable synchronous triggering collection system for CT equipment according to claim 1, is characterized in that, other exposure position and the collection position of being provided with of described adjustable delay mechanism (5) determines exposed pulse (7) and acquisition pulse (8) respectively.
3. the adjustable synchronous triggering collection system for CT equipment according to claim 1, it is characterized in that, described adjustable delay mechanism (5) comprises catch (51) and adjustable fixing hole (52), and described catch (51) bottom is provided with described adjustable fixing hole (52).
4. the adjustable synchronous triggering collection system for CT equipment according to claim 1, is characterized in that, described adjustable delay mechanism (5) and described rack encoder (6) are individually fixed on the quartering position on described CT equipment rack.
5. the adjustable synchronous triggering collection system for CT equipment according to claim 4, it is characterized in that, described adjustable delay mechanism (5) and described rack encoder (6) are not limited to this one with the fixed relationship of described CT equipment rack, only need meet mounting means and sequential generation requirement.
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| CN201410629592.3A CN104473656B (en) | 2014-11-11 | 2014-11-11 | Adjustable synchronous triggering acquiring system for CT device |
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| CN201410629592.3A CN104473656B (en) | 2014-11-11 | 2014-11-11 | Adjustable synchronous triggering acquiring system for CT device |
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| CN104473656B CN104473656B (en) | 2017-05-24 |
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| JPH11226006A (en) * | 1998-02-18 | 1999-08-24 | Arco Bell Graphics Japan:Kk | Computer tomograph |
| US20050232394A1 (en) * | 2004-04-14 | 2005-10-20 | Keith Gray | Synchronization of x-ray data acquisition |
| CN1595290A (en) * | 2004-07-02 | 2005-03-16 | 东软飞利浦医疗设备系统有限责任公司 | Digital photograph automatic exposure unit for X-ray production apparatus and control method |
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