CN103385730A - PET (Positron Emission Tomography) equipment - Google Patents
PET (Positron Emission Tomography) equipment Download PDFInfo
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- CN103385730A CN103385730A CN2012101456309A CN201210145630A CN103385730A CN 103385730 A CN103385730 A CN 103385730A CN 2012101456309 A CN2012101456309 A CN 2012101456309A CN 201210145630 A CN201210145630 A CN 201210145630A CN 103385730 A CN103385730 A CN 103385730A
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Abstract
The invention provides PET (Positron Emission Tomography) equipment. The PET equipment comprises a front end electronics system and a data acquisition system and further comprises a Bucket controller, wherein the Bucket controller comprises at least one first interface and a processing chip; one end of the first interface is connected with a module controller in the front end electronics system and is used for receiving module events from the module controller; and the processing chip is connected with the other end of the first interface and is used for grouping the received module events to form a Bucket event and then sending the Bucket event to the data acquisition system. The front end electronics system in the PET equipment is modularized, so that the internal structure of the PET equipment is more compact.
Description
Technical field
The present invention relates to a kind of nucleus medical image equipment device, relate in particular to a kind of PET equipment.
Background technology
PET full name in medical science is: positron emission computer tomography (Positron Emission Computed Tomography) is the more advanced clinical examination image technology of the field of nuclear medicine.The measurement of PET is highly sensitive, is a kind of video picture that reflects the molecule metabolism.When disease is in the molecular level changes phase in early days; the morphosis of diseased region not yet presents extremely; MRI(Magnetic Resonance Imaging; nuclear magnetic resonance), the CT(computed tomography) check while can't clarify a diagnosis; PET checks can find the disease place, and can obtain 3-dimensional image, can also carry out quantitative analysis; reach early diagnosis, and this is that other image check is incomparable at present.
PET equipment is by 1024 photomultiplier tubes, and the nuclear measurement system of the complexity of corresponding 1024 electronics passages composition.The correction of detector performance is arranged in this system, as amplification; Choosing of threshold value, biasing arranged; Choosing of energy window, location boundary arranged; The collection of data is arranged; The setting of mode of operation etc. is arranged.
Hence one can see that, and existing PET equipment can be very huge, and internal structure is also very complicated.
Summary of the invention
In order to solve the problems of the technologies described above, the purpose of this invention is to provide a kind of PET equipment,, by the front-end electronics system modular with in PET equipment, make the PET equipment inner structure compacter.
For addressing the above problem, the technical solution adopted in the present invention provides a kind of PET equipment, comprising: front-end electronics system and data collecting system also comprise: the Bucket controller, and wherein said Bucket controller comprises:
At least one first interface, one end of described first interface is connected with the module controller in described front-end electronics system, be used for receiving the module event from described module controller, be that detector detects photon, receive the independently positional information of corresponding detector module (block), energy information, temporal information and number control signal;
Process chip, be connected with the other end of described first interface, is used for the module event packets that will receive, and forms the Bucket event, be about to four module events and form a Bucket event, after send to described data collecting system.
Say further: described Bucket controller also comprises the second interface, one end of described the second interface is connected with described process chip, the other end of described the second interface is connected with the processing system that meets in described PET equipment, meet process acquisition system be utilize the coincidence measurement technology with the front-end electronics system acquisition to data process, obtain the initial data of image.
Say further: described Bucket controller also comprises the 3rd interface, and an end of described the 3rd interface is connected with described process chip, and the other end of described the 3rd interface is connected with clock, communication controler in described front-end electronics system;
Described process chip receives clock and the synchronizing clock signals from described clock, communication controler, and with described clock, communication controler, sets up communication port and clock and synchronised clock passage.
Say further: described Bucket controller also comprises the 4th interface, and an end of described the 4th interface is connected with described process chip, and the other end of described the 4th interface is connected with power-supply system, is used for access ± 5V power supply.
Say further: described Bucket controller designs based on FPGA.
As shown from the above technical solution, the present invention has following beneficial effect:
At first, adopt the Bucket controller to make whole electronic system clear layer, control 2 module controllers by 1 Bucket controller simultaneously, the example of 64 module controller outputs, be shrunk to 32 Bucket example outputs, make so the follow-up processing system that meets more easily realize.
Secondly, clock, communication controler can be controlled 4 follow-up module controllers by this Bucket controller, make the structure of whole front-end electronics system very compact, and the synchronicity of time is very consistent, due to separate between the Bucket group in system, line is very succinct.
Description of drawings
Fig. 1 is the structured flowchart of Bucket controller in embodiments of the invention.
The specific embodiment
The purpose, technical solutions and advantages of the present invention are more clear to be understood in order to make, and below in conjunction with embodiment and accompanying drawing, example of the present invention is described in further detail.At this, illustrative examples of the present invention and explanation are used for explaining the present invention, but and not as limiting to the invention.
Example of the present invention provides a kind of PET equipment, comprising: front-end electronics system and data collecting system also comprise: the Bucket controller.As shown in Figure 1, be the structured flowchart of Bucket controller in embodiments of the invention, this Bucket controller comprises:
At least one first interface, an end of first interface is connected with the module controller in the front-end electronics system, is used for receiving the module event from the module controller;
Process chip, be connected with the other end of first interface, is used for the module event packets that will receive, and sends to described data collecting system after formation Bucket event.
In the present embodiment, this first interface comprises: JS1 interface, JS2 interface, JS3 interface and JS4 interface, what certainly can understand is not limit in the present embodiment the concrete structure of this first interface.
In the present embodiment, the module controller comprises: a module controller, the 2nd module controller, the 3rd module controller and the 4th module controller, what certainly can understand is not limit in the present embodiment the concrete structure of this module controller.
Referring to Fig. 1, the JS1 interface is connected with a module controller; The JS2 interface is connected with the 2nd module controller; The JS3 interface is connected with the 3rd module controller; The JS4 interface is connected with the 4th module controller.
Continuation is referring to Fig. 1, and this Bucket controller also comprises the second interface, and an end of this second interface is connected with process chip, and the other end of this second interface is connected with the processing system that meets in PET equipment.For example this second interface is the JS5 interface.
Continuation is referring to Fig. 1, and this Bucket controller also comprises the 3rd interface, and an end of the 3rd interface is connected with process chip, and the other end of the 3rd interface is connected with clock, communication controler in the front-end electronics system, and for example the 3rd interface is the JS6 interface;
Process chip receives clock and the synchronizing clock signals of self-clock, communication controler, and with clock, communication controler, set up communication port and clock and synchronised clock passage, thereby provide clock and synchronised clock for the module controller in the front-end electronics system.
This clock, communication controler can be controlled follow-up 4 module controllers, 16 block controllers by the Bucket controller, make the structure of whole front-end electronics system very compact, and the synchronicity of time are consistent.
In this example, the Bucket controller also comprises the 4th interface, and an end of the 4th interface is connected with process chip, and the other end of the 4th interface is connected with power-supply system, is used for access ± 5V power supply.For example the 4th interface is the JS7 interface.
In the present embodiment, but this Bucket controller Bucket controller design based on FPGA, what certainly can understand is not limit in the present embodiment the specific implementation of Bucket controller.
, in order to realize the function of Bucket controller, below introduce the process that various functions and the key index of Bucket controller are tested.The concrete method of implementing is:
(1) theory diagram of design Bucket controller, define the difference output of port signal and signal;
(2) according to theory diagram, the circuit board drawing of design apparatus, comprise the flaggy of device, and the layout of size and device, after circuit board making is good, be soldered to circuit board with former device;
(3) after device is made, power up test b ucket controller, the main power source 5V of testing inner, 3.3V, 1.2V, test result shows inner main power source all within normal range, display lamp shows all normal;
(4) utilize ISE to develop software, the exploitation PLD, will be downloaded in FPGA by jtag port after the VHDL code compilation of writing.After downloading successfully, have a DONE signal lights to brighten, expression FPGA is programmed;
(5) this Bucket controller and clock, communication controler are connected into system.According to the communication protocol of definition, utilize and detect software, the Bucket controller is communicated test.After relating to the response that the communication protocol of this Bucket controller obtains being scheduled to, show that the communication of device is normal;
(6) 4 module controllers and this Bucket controller, and clock, communication controler connect into detector test system, carries out temperature test, meets test and counting rate test.All data, figure are all reasonable, and the expression controller is working properly;
(7), with oscillograph test clock, synchronised clock port, mainly measure the sequential relationship of each port clock and synchronised clock, the synchronized relation between each port clock.During requiring the positive pulse of each port synchronised clock, there is and only have the rising edge of a clock, between the rising edge clock of each port, differ and be less than 2ns.
(8) this Bucket controller has two kinds of voltages ,+5V and-5V.In the situation that do not add the module controller, the input current of 5V power supply is generally less than 0.6A, and-5V is unloaded.
(9) different B ucket controller is measured respectively.Measurement result shows, all Bucket controllers are in communication, clock synchronous, and these aspects of power consumption are basically identical.
As shown from the above technical solution, this example has following beneficial effect:
One, the Bucket controller in this example can utilize PLD to realize, utilize difference output function module that its inside has, RAM, built-in PROM and a large amount of programmable units, add the auxiliary peripheral circuit, as power supply, temperature sensor etc., programme based on VHDL, realized multichannel communication multiple telecommunication control, multipath clock distributes, and multipath clock is synchronous, and parameter such as preserves and read at the function;
Two, the Bucket controller in this example can make the front-end electronics system modular, and the device of use reduces, and the interconnector of system reduces in a large number, makes controller be easy to produce, and cost is low;
Three, the Bucket controller in this example, can easily build a PET equipment, be used for measuring the various performances of detector, even can measure the time accordance between detector, substituted expensive, complicated special measurement system fully, made to measure to become very simple, light;
Four, the Bucket controller in this example has designed redundant circuit, is used for realizing clock, RS232 communication drivers etc., can not connect clock, communication controler and is developed to separately system or the parts with other function.
The above is only the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. PET equipment comprises: front-end electronics system and data collecting system, it is characterized in that, and also comprise: the Bucket controller, wherein said Bucket controller comprises:
At least one first interface, an end of described first interface is connected with the module controller in described front-end electronics system, is used for receiving the module event from described module controller;
Process chip, be connected with the other end of described first interface, is used for a plurality of module event packets that will receive, and sends to described data collecting system after formation Bucket event.
2. PET equipment according to claim 1, it is characterized in that, described Bucket controller also comprises the second interface, one end of described the second interface is connected with described process chip, the other end of described the second interface is connected with the processing system that meets in described PET equipment, meet process acquisition system be utilize the coincidence measurement technology with the front-end electronics system acquisition to data process, obtain the initial data of image.
3. PET equipment according to claim 1, it is characterized in that, described Bucket controller also comprises the 3rd interface, and an end of described the 3rd interface is connected with described process chip, and the other end of described the 3rd interface is connected with clock, communication controler in described front-end electronics system;
Described process chip receives clock and the synchronizing clock signals from described clock, communication controler, and with described clock, communication controler, sets up communication port and clock and synchronised clock passage.
4. PET equipment according to claim 1, it is characterized in that, described Bucket controller also comprises the 4th interface, and an end of described the 4th interface is connected with described process chip, the other end of described the 4th interface is connected with power-supply system, is used for access ± 5V power supply.
5. PET equipment according to claim 1, is characterized in that, described Bucket controller designs based on FPGA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101456309A CN103385730A (en) | 2012-05-10 | 2012-05-10 | PET (Positron Emission Tomography) equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101456309A CN103385730A (en) | 2012-05-10 | 2012-05-10 | PET (Positron Emission Tomography) equipment |
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| WO2010048626A2 (en) * | 2008-10-24 | 2010-04-29 | University Of Washington | Improved data-processing electronics for use in a positron-emission tomography system |
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| CN102341727A (en) * | 2009-03-06 | 2012-02-01 | 皇家飞利浦电子股份有限公司 | Advanced temperature compensation and control circuit for single photon counters |
| CN202589546U (en) * | 2012-05-10 | 2012-12-12 | 北京大基康明医疗设备有限公司 | PET (position emission computed tomography) equipment |
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- 2012-05-10 CN CN2012101456309A patent/CN103385730A/en active Pending
Patent Citations (5)
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| CN1760694A (en) * | 2004-10-12 | 2006-04-19 | 西门子公司 | Detection device |
| WO2010048626A2 (en) * | 2008-10-24 | 2010-04-29 | University Of Washington | Improved data-processing electronics for use in a positron-emission tomography system |
| CN102341727A (en) * | 2009-03-06 | 2012-02-01 | 皇家飞利浦电子股份有限公司 | Advanced temperature compensation and control circuit for single photon counters |
| CN102274041A (en) * | 2011-05-23 | 2011-12-14 | 江苏中惠医疗科技股份有限公司 | Fully-digitalized processing device of positron emission tomography imaging electronics system |
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Application publication date: 20131113 |