CN104407540A - CT data acquisition system - Google Patents
CT data acquisition system Download PDFInfo
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- CN104407540A CN104407540A CN201410566155.1A CN201410566155A CN104407540A CN 104407540 A CN104407540 A CN 104407540A CN 201410566155 A CN201410566155 A CN 201410566155A CN 104407540 A CN104407540 A CN 104407540A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
Abstract
The invention relates to the technical field of X-ray CT, and particularly discloses a CT data acquisition system. Image reconstruction work is completed in the CT data acquisition system, and the reconstructed image information in which users are interested is transmitted out according to user requirements so that transmission data volume is reduced, the requirement for data transmission rate of a slip ring is reduced, and thus slip ring manufacturing and installing cost is reduced. Besides, more other schemes, such as wireless transmission, can also be selected to perform CT data transmission. Common CT machines are equipped with an image work station which is internally equipped with a field programmable gate array image acceleration card or a GPU acceleration card. An image reconstruction platform is moved to the field programmable gate array of the CT data acquisition data acquisition so that the image work station is simplified, CT volume structure is enabled to be more compact, hardware acceleration rapid image reconstruction is realized, a reconstruction algorithm can be reconfigured and slip ring transmission data volume is reduced.
Description
Technical field
The present invention relates to x-ray ct technology field, be specifically related to a kind of CT data acquisition system (DAS) contained based on the acceleration of hardware (field programmable gate array or ASIC) image, image reconstruction module.
Background technology
In traditional CT machine, data acquisition system (DAS) is positioned in the frame of rotation, in order to data are needed to carry out data transmission by slip ring by the frame of rotating being transferred in fixing frame.Along with the development of CT, the detector number of plies increases, and sweep velocity speeds, and data nearly a few Gb of scanning in one second, improves day by day to the requirement of slip ring data rate and quality.
The raw data that slip ring transfers out will be sent on PC and rebuild; Along with the popularization and application of iterative algorithm, performance requirement for reconstructing computer increases, the accelerated reconstruction of image need be realized by computer image processor (GPU), field programmable gate array or special IC (ASIC) etc., view data the amount of data stored after reconstruction comparatively rebuild before scan data volume greatly reduce, but the time needed for image reconstruction and computing cost also increase gradually.
Especially Mobile CT, Mobile CT such as to rescue at the scene after being mainly used in various vehicle-mounted, boat-carrying, shake under, require the volume structure of CT as far as possible compact, weight as far as possible light, algorithm rebuild speed as quickly as possible.General commercial CT uses noncontact slip ring transmission data, and general transmission speed is 1Gbps ~ 3Gbps, and noncontact slip ring generally transmits data by radio frequency or light, and require higher for manufacture accuracy, making and installation cost is high.
Summary of the invention
For solving the problems of the technologies described above, we have proposed a kind of CT data acquisition system (DAS), its objective is: the making and installation cost reducing CT slip ring volume of transmitted data and slip ring, and make the volume structure of CT compacter.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of CT data acquisition system (DAS), comprise detector module, data acquisition module, raw data pretreatment module, raw data memory module, image reconstruction algorithm module, reconstructed results access module and gather and rebuild control module, configurable at least two the CT image reconstruction algorithm modules of image reconstruction algorithm module and algorithm parameter configuration module, described image reconstruction algorithm module is positioned at field programmable gate array, reconfigurable image algorithm parameter;
Detector module collects the data that detector gathers, and the data of collection are transferred to data acquisition module by detector module;
Data acquisition module carries out analog to digital conversion and collecting work to the data that detector module is collected, and the data transmission raw data pretreatment module that will complete;
Raw data pretreatment module carries out dark current removal, normalization and filtering process to the data that data acquisition module transmission comes, and is stored in raw data memory module by the data after process;
Image reconstruction algorithm module needs to configure different image algorithm parameters according to user, from raw data memory module, data are extracted again according to selected image algorithm parameter, carry out CT image reconstruction, and the CT image of reconstruction is stored in reconstructed results access module;
Gather and rebuild the CT image that control module extracts reconstruction from reconstructed results access module, and control algolithm parameter configuration module coupling, renewal CT image reconstruction algorithm module;
Gather reconstruction control module and be provided with external data interface.
Preferably, the algorithm in CT image reconstruction algorithm module is the one in commercial CT image reconstruction algorithm, and the algorithm in each CT image reconstruction algorithm module is not identical with the algorithm in other CT image reconstruction algorithm modules.
Preferably, the memory device that reconstructed results access module adopts is nonvolatile memory.
The hardware architecture of this CT data acquisition system (DAS), comprises rotary frame, detector, storer, data source and sink, mobile terminal, backboard, processor and field programmable gate array.
According to embodiments of the invention 1, the quantity of field programmable gate array is two pieces, wherein one piece of field programmable gate array is the collection site programmable gate array for detector module and data collecting module collected data, and another block field programmable gate array is the reconstruction field programmable gate array carrying out image algorithm parameter configuration and CT image reconstruction for image reconstruction algorithm module;
Detector, backboard and data source and sink are installed on rotary frame, and storer, collection site programmable gate array, reconstruction field programmable gate array and processor are installed on backboard;
Detector is electrically connected with collection site programmable gate array, collection site programmable gate array is electrically connected with reconstruction field programmable gate array and processor, rebuild field programmable gate array to be electrically connected with storer and processor, processor is electrically connected with data source and sink, and carries out data transmission and exchange between processor and data source and sink;
Data source and sink and mobile terminal carry out data transmission and exchange by wireless transmission method.
According to embodiments of the invention 2, the quantity of described field programmable gate array is one piece, detector module, data acquisition module and image reconstruction algorithm module are all arranged in described field programmable gate array, and algorithm correlation parameter is configured by field programmable gate array;
Detector, backboard and data source and sink are installed on rotary frame, and storer, field programmable gate array and processor are installed on backboard;
Detector is electrically connected with field programmable gate array, field programmable gate array and processor electrical connection, storer and processor electrical connection, described processor is electrically connected with data source and sink, and carries out data transmission and exchange between processor and data source and sink;
Data source and sink and mobile terminal carry out data transmission and exchange by wireless transmission method.
Pass through technique scheme, only transmit out the interested image information of user, decrease transmitted data amount, reduce the requirement of the message transmission rate to slip ring, make the manufacture of slip ring, installation cost is minimized, also other schemes more can be selected in addition to carry out the transmission of CT data, such as wireless transmission.General CT machine is all furnished with image workstation, field programmable gate array image accelerator card or GPU accelerator card is furnished with in image workstation, and general CT data acquisition system (DAS) is all that the field programmable gate array of use is as data acquisition process chip, by image reconstruction platform movement in the field programmable gate array of the data acquisition system (DAS) of CT, simplify image workstation, make the volume structure of CT become more compact, achieve hardware-accelerated fast image reconstruction, reconfigurable reconstruction algorithm, slip ring transmitted data amount are low.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of a kind of CT data acquisition system (DAS) disclosed in this invention;
The schematic diagram of the hardware architecture of a kind of CT data acquisition system (DAS) of announcement that Fig. 2 is the embodiment of the present invention 1;
The schematic diagram of the hardware architecture of a kind of CT data acquisition system (DAS) of announcement that Fig. 3 is the embodiment of the present invention 2.
Numeral and the corresponding component title represented by letter in figure:
1. the collection of detector module 2. data acquisition module 3. raw data pretreatment module 4. raw data memory module 5. image reconstruction algorithm module 51.CT image reconstruction algorithm module 53. algorithm parameter configuration module 6. reconstructed results access module 7. is rebuild control module 11. rotary frame 12. detector 13. storer 14. data source and sink 15. mobile terminal 16. backboard 17. collection site programmable gate array 18. and is rebuild field programmable gate array 19. processor.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Below in conjunction with schematic diagram, the specific embodiment of the present invention is described in further detail.
Embodiment 1.
As shown in Figure 1, a kind of CT data acquisition system (DAS), comprise detector module 1, data acquisition module 2, raw data pretreatment module 3, raw data memory module 4, image reconstruction algorithm module 5, reconstructed results access module 6 and gather and rebuild control module 7, described image reconstruction algorithm module 5 configures two CT image reconstruction algorithm modules 51 and algorithm parameter configuration module 53, described image reconstruction algorithm module 5 is positioned at field programmable gate array, reconfigurable image algorithm parameter.
Detector module 1 collects the data that detector gathers, and the data of collection are transferred to data acquisition module 2 by detector module 1.
The data that data acquisition module 2 pairs of detector modules 1 are collected carry out analog to digital conversion and collecting work, and the data transmission raw data pretreatment module 3 that will complete.
Raw data pretreatment module 3 pairs of data acquisition modules 2 transmit the data come and carry out the process such as dark current removal, normalization and filtering, and the data after process are stored in raw data memory module 4.
Image reconstruction algorithm module 5 needs to configure different image algorithm parameters according to user, from raw data memory module 4, data are extracted again according to selected image algorithm parameter, carry out CT image reconstruction, and the CT image of reconstruction is stored in reconstructed results access module 6.
Gather and rebuild the CT image that control module 7 extracts reconstruction from reconstructed results access module 6, and control algolithm parameter configuration module 53 is mated, upgraded CT image reconstruction algorithm module 51.
Gather reconstruction control module 7 and be provided with external data interface, facilitate collection reconstruction control module 7 and be connected with data transmission set.
Algorithm in CT image reconstruction algorithm module 51 is the one in commercial CT image reconstruction algorithm, algorithm in each CT image reconstruction algorithm module 51 is not identical with the algorithm in other CT image reconstruction algorithm modules 51, and commercial CT image reconstruction algorithm comprises FDK algorithm, iterative reconstruction algorithm etc.
The memory device that reconstructed results access module 6 adopts is nonvolatile memory, and nonvolatile memory is one or more among solid state hard disc, FLASH etc., ensure that the stability that data are preserved.
As shown in Figure 2, a kind of hardware architecture of CT data acquisition system (DAS), comprises rotary frame 11, detector 12, storer 13, data source and sink 14, mobile terminal 15, backboard 16, processor 19 and field programmable gate array.
The quantity of field programmable gate array is two pieces, wherein one piece of field programmable gate array is the collection site programmable gate array 17 for detector module 1 and data acquisition module 2 image data, and another block field programmable gate array is the reconstruction field programmable gate array 18 carrying out image algorithm parameter configuration and CT image reconstruction for image reconstruction algorithm module 5.
Detector 12, backboard 16 and data source and sink 14 are installed on rotary frame 11, and storer 13, collection site programmable gate array 17, reconstruction field programmable gate array 18 and processor 19 are installed on backboard 16.
Detector 12 is electrically connected with collection site programmable gate array 17, collection site programmable gate array 17 is electrically connected with reconstruction field programmable gate array 18 and processor 19, rebuild field programmable gate array 18 to be electrically connected with storer 13 and processor 19, processor 19 is electrically connected with data source and sink 14, and carries out data transmission and exchange between processor 19 and data source and sink 14.
Data source and sink 14 and mobile terminal 15 carry out data transmission and exchange by wireless transmission method or slip ring.
Be exactly more than a kind of module composition and hardware architecture of CT data acquisition system (DAS), its advantage: make the volume structure of CT become more compact, hardware-accelerated fast image reconstruction, reconfigurable reconstruction algorithm, slip ring transmitted data amount are low, available wireless transmission.
Embodiment 2.
When the capacity of field programmable gate array and performance enough large time, as shown in figures 1 and 3, a kind of hardware architecture of CT data acquisition system (DAS), compared with embodiment 1, institute's difference is that the quantity of described field programmable gate array is one piece, detector module 1, data acquisition module 2 and image reconstruction algorithm module 5 are all arranged in described field programmable gate array, and algorithm correlation parameter is configured by field programmable gate array.
Detector 12, backboard 16 and data source and sink 14 are installed on rotary frame 11, and storer 13, field programmable gate array and processor 19 is installed on backboard 16.
Detector 12 is electrically connected with field programmable gate array, field programmable gate array and processor 19 are electrically connected, described storer 13 and processor 19 are electrically connected, and processor 19 is electrically connected with data source and sink 14, and carry out data transmission and exchange between processor 19 and data source and sink 14.
Data source and sink 14 and mobile terminal 15 carry out data transmission and exchange by wireless transmission method or slip ring, and all the other are identical with embodiment 1, also do not do special restriction, equally all belong to protection scope of the present invention at this.Its production run is also identical with embodiment 1, does not repeat them here.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (6)
1. a CT data acquisition system (DAS), it is characterized in that, comprise detector module (1), data acquisition module (2), raw data pretreatment module (3), raw data memory module (4), image reconstruction algorithm module (5), control module (7) is rebuild in reconstructed results access module (6) and collection, configurable at least two the CT image reconstruction algorithm modules (51) of image reconstruction algorithm module (5) and algorithm parameter configuration module (53), described image reconstruction algorithm module (5) is positioned at field programmable gate array, reconfigurable image algorithm parameter,
Detector module (1) collects the data that detector gathers, and the data of collection are transferred to data acquisition module (2) by detector module (1);
Data acquisition module (2) carries out analog to digital conversion and collecting work to the data that detector module (1) is collected, and data transmission raw data pretreatment module (3) that will complete;
Raw data pretreatment module (3) carries out dark current removal, normalization and filtering process to the data that data acquisition module (2) transmission comes, and is stored in raw data memory module (4) by the data after process;
Image reconstruction algorithm module (5) needs to configure different image algorithm parameters according to user, from raw data memory module (4), data are extracted again according to selected image algorithm parameter, carry out CT image reconstruction, and the CT image of reconstruction is stored in reconstructed results access module (6);
Gather and rebuild the CT image that control module (7) extracts reconstruction from reconstructed results access module (6), and control algolithm parameter configuration module (53) is mated, upgraded CT image reconstruction algorithm module (51);
Gather reconstruction control module (7) and be provided with external data interface.
2. a kind of CT data acquisition system (DAS) according to claim 1, it is characterized in that, algorithm in CT image reconstruction algorithm module (51) is the one in commercial CT image reconstruction algorithm, and the algorithm in each CT image reconstruction algorithm module (51) is not identical with the algorithm in other CT image reconstruction algorithm modules (51).
3. a kind of CT data acquisition system (DAS) according to claim 1, is characterized in that, the memory device that reconstructed results access module (6) adopts is nonvolatile memory.
4. the hardware architecture of a kind of CT data acquisition system (DAS) according to claim 1, it is characterized in that, comprise rotary frame (11), detector (12), storer (13), data source and sink (14), mobile terminal (15), backboard (16), processor (19) and field programmable gate array.
5. the hardware architecture of a kind of CT data acquisition system (DAS) according to claim 4, it is characterized in that, the quantity of field programmable gate array is two pieces, wherein one piece of field programmable gate array is the collection site programmable gate array (17) for detector module (1) and data acquisition module (2) image data, and another block field programmable gate array is the reconstruction field programmable gate array (18) carrying out image algorithm parameter configuration and CT image reconstruction for image reconstruction algorithm module (5);
Detector (12), backboard (16) and data source and sink (14) are installed on rotary frame (11), and storer (13), collection site programmable gate array (17), reconstruction field programmable gate array (18) and processor (19) are installed on backboard (16);
Detector (12) is electrically connected with collection site programmable gate array (17), collection site programmable gate array (17) is electrically connected with reconstruction field programmable gate array (18) and processor (19), rebuild field programmable gate array (18) to be electrically connected with storer (13) and processor (19), processor (19) is electrically connected with data source and sink (14), and carries out data transmission and exchange between processor (19) and data source and sink (14);
Data source and sink (14) and mobile terminal (15) carry out data transmission and exchange by wireless transmission method.
6. the hardware architecture of a kind of CT data acquisition system (DAS) according to claim 4, it is characterized in that, the quantity of described field programmable gate array is one piece, detector module (1), data acquisition module (2) and image reconstruction algorithm module (5) are all arranged in described field programmable gate array, and algorithm correlation parameter is configured by field programmable gate array;
Detector (12), backboard (16) and data source and sink (14) are installed on rotary frame (11), and storer (13), field programmable gate array and processor (19) are installed on backboard (16);
Detector (12) is electrically connected with field programmable gate array, field programmable gate array and processor (19) electrical connection, described storer (13) and processor (19) electrical connection, processor (19) is electrically connected with data source and sink (14), and carries out data transmission and exchange between processor (19) and data source and sink (14);
Data source and sink (14) and mobile terminal (15) carry out data transmission and exchange by wireless transmission method.
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| CN201410566155.1A CN104407540A (en) | 2014-10-22 | 2014-10-22 | CT data acquisition system |
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| CN201410566155.1A CN104407540A (en) | 2014-10-22 | 2014-10-22 | CT data acquisition system |
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Cited By (1)
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| CN109246857A (en) * | 2018-08-06 | 2019-01-18 | 沈阳晟诺科技有限公司 | A kind of non-slip-ring type CT machine communication system and method |
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