CN104473656B

CN104473656B - Adjustable synchronous triggering acquiring system for CT device

Info

Publication number: CN104473656B
Application number: CN201410629592.3A
Authority: CN
Inventors: 陈奭; 张寅�; 袁刚; 郁朋; 周志勇; 范梅生
Original assignee: Suzhou Institute of Biomedical Engineering and Technology of CAS
Current assignee: Suzhou Institute of Biomedical Engineering and Technology of CAS
Priority date: 2014-11-11
Filing date: 2014-11-11
Publication date: 2017-05-24
Anticipated expiration: 2034-11-11
Also published as: CN104473656A

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

A kind of adjustable synchronous triggering collection system for CT equipment

Technical field

The present invention relates to the apparatus and system for being used to synchronize emission source and collection terminal during CT device data acquisitions, tool Body is related to a kind of adjustable synchronous triggering collection system for CT equipment.

Background technology

Collection synchronization system determines that CT scanner finally obtains having for data as one of the critical system of CT scanner Effect property and reliability, and the stability that system works.CT scanner radiographic source from begin to send out ray to ray stabilization during Have certain delay, the partial data will be dropped in data reconstruction, and use with part the aging delay when Between be variable.

By code-disc, the Digital Logic of zero hole and correlation realizes the same of exposure and data acquisition to prior art Step, that is, be zeroed hole and code-disc provide the basic sequential of exposure and collection, and digital logic portion is controlled, and exposure and data acquisition are same Shi Jinhang, has no delay control or adjustable part.

Current conventional scheme is that the delay is offset by increasing scanning distance or adjustment firmware program, the A kind of scheme has precision not enough, is likely to result in patient and absorbs excessive dose of radiation；Second scheme needs to carry out firmware to repair Change, technological means is complex.

The content of the invention

The object of the present invention is to overcome the problems of the prior art, there is provided a kind of adjustable synchronous for CT equipment are touched Hair acquisition system.

To realize above-mentioned technical purpose, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：

A kind of adjustable synchronous triggering collection system for CT equipment, including synchronous triggering timing management unit, it is described same Step triggering timing management unit is connected to radiographic source control unit, data collection control unit, and communication-cooperation module is adjustable Delay device and rack encoder, the communication-cooperation module also respectively with the radiographic source control unit and the data acquisition Control unit is connected.

Further, exposure position and collection position are provided with by the adjustable delay mechanism and determine exposed pulse and collection respectively Pulse.

Further, the adjustable delay mechanism includes catch and adjustable fixing hole, the catch bottom be provided with it is described can Adjust fixing hole.

Preferably, the adjustable delay mechanism and the rack encoder are individually fixed in four on the CT equipment racks On position of halving.

Further, the fixed relationship of the adjustable delay mechanism and the rack encoder and the CT equipment racks is not It is limited to this kind of, need to only meets mounting means and sequential produces requirement.

Beneficial effects of the present invention:

Using technical solution of the present invention, realize by tunable arrangement, there is provided synchronous triggering device basis sequential, it is synchronous to touch Transmitting apparatus produce work synchronous sequence according to basic sequential, are distributed to ray control unit and data acquisition unit, ray control Unit and data acquisition unit complete exposure by coordinating communication module and collection is synchronous, and avoids in tube current and tube voltage not Data acquisition is carried out in the state of stabilization, if occurring any problem coordinating communication module in gatherer process can interrupt ray exposure Light, it is ensured that the stabilization of data acquisition, it is safe and effective；I.e. can by simple adjustment expose collection lazy-tongs come to collection and Time for exposure carries out delay regulation, and the simple precision of installation is higher, reduces system design complexity, improves data acquisition success rate.

Brief description of the drawings

Fig. 1 is adjustable delay structural scheme of mechanism of the invention；

Fig. 2 is that frame of the invention fixes schematic diagram；

Fig. 3 is system architecture schematic diagram of the invention.

Label declaration in figure：1st, synchronous triggering timing management unit, 2, radiographic source control unit, 3, data acquisition control list Unit, 4, communication-cooperation module, 5, adjustable delay mechanism, 51, catch, 52, adjustable fixing hole, 6, rack encoder, 7, exposure arteries and veins Punching, 8, acquisition pulse.

Specific embodiment

Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Shown in reference picture 1- Fig. 3, a kind of adjustable synchronous triggering collection system for CT equipment, including synchronous triggering sequential Administrative unit 1, the synchronous triggering timing management 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, the communication-cooperation module 4 also respectively with the ray Source control unit 2 and the data collection control unit 3 are connected.

Further, exposure position and collection position are provided with by the adjustable delay mechanism 5 to determine exposed pulse 7 and adopt respectively Collection pulse 8.

Further, the adjustable delay mechanism 5 includes catch 51 and adjustable fixing hole 52, and the bottom of the catch 51 is provided with The adjustable fixing hole 52.

Preferably, the adjustable delay mechanism 5 and the rack encoder 6 are individually fixed on the CT equipment racks On quartering position.

Further, the fixed relationship of the adjustable delay mechanism 5 and the rack encoder 6 and the CT equipment racks It is not limited to this kind of, need to only meets mounting means and sequential produces requirement.

Embodiment：

Postpone sequential to determine and adjust：

Postpone sequential to be determined by radiographic source stabilization time, by determining the regulating time of radiographic source, or consult its user Handbook understands its regulating time t_p, adjustable delay mechanism 5 is r away from frame geometric center distance, and frame angular speed is ω, thus may be used The catch 51 of adjustable delay mechanism 5 is calculated apart from L.

Linear velocity at catch 51：

v=ωr

t_pThe displacement of interior catch 51 is：

S=vt_p

Work as r>>During L：

L≈S

Can then obtain the catch 51 of adjustable delay mechanism 5 apart from can approximate expression be：

L=ωrt_p

Exposure gathers sending for synchronous sequence：

The slow-speed of revolution when self-inspection is started of CT frames determines exposure position（Exposed pulse 7）With collection position acquisition pulse 8, and it Relativeness with count pulse.During into scanning process, when exposure position and collection position send trigger pulse first, system stream Cheng Zhihang is as follows：Exposure position produces exposed pulse by the synchronous timing management unit 1 that triggers, and control bulb exposure, collection position is logical Synchronous triggering timing management unit 1 generation acquisition pulse is crossed, control data acquisition system carries out data acquisition.In running, Synchronous triggering timing management unit 1 can be counted to acquisition trigger pulse simultaneously, determine the validity of gathered data, be counted respectively Number gathers position to position, and exposure position is exposed to the acquisition trigger pulse gathered between position, if umber of pulse and reference pulse number phase When difference reaches certain amount, it is believed that data failure, radiographic source is closed, count pulse locking, stops data acquisition.

The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims

1. a kind of adjustable synchronous triggering collection system for CT equipment, it is characterised in that including synchronous triggering timing management list Unit（1）, the synchronous triggering timing management unit（1）It 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）, the communication-cooperation module（4）Also distinguish With the radiographic source control unit（2）With the data collection control unit（3）Connection, the adjustable delay mechanism（5）Side sets There are exposure position and collection position to determine exposed pulse respectively（7）And acquisition pulse（8）, the adjustable delay mechanism（5）Including gear Piece（51）With adjustable fixing hole（52）, the catch（51）Bottom is provided with the adjustable fixing hole（52）, postpone sequential by ray Source stabilization time determines, by the regulating time t for determining radiographic source_p, the adjustable delay mechanism（5）Away from frame geometrical center to center From r, frame angular velocity omega calculates the adjustable delay mechanism（5）The catch（51）Apart from L, the catch（51）Place Linear velocity：V=ω r, t_pThe displacement of the interior catch 51 is：S=vt_p, work as r>>During L, L ≈ S, then the adjustable delay mechanism（5） The catch（51）Distance can be expressed as：L=ωrt_p。

2. the adjustable synchronous triggering collection system for CT equipment according to claim 1, it is characterised in that described adjustable Delay device（5）With the rack encoder（6）It is individually fixed on the quartering position on the CT equipment racks.

3. the adjustable synchronous triggering collection system for CT equipment according to claim 2, it is characterised in that described adjustable Delay device（5）With the rack encoder（6）This one kind is not limited to the fixed relationship of the CT equipment racks, only needs to meet Mounting means and sequential produce requirement.