CN206649168U - Radiation remains scanning means and system - Google Patents
Radiation remains scanning means and system Download PDFInfo
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- CN206649168U CN206649168U CN201720127588.6U CN201720127588U CN206649168U CN 206649168 U CN206649168 U CN 206649168U CN 201720127588 U CN201720127588 U CN 201720127588U CN 206649168 U CN206649168 U CN 206649168U
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Abstract
The utility model provides a kind of radiation residual scanning means and system, is related to medicine imaging technique field, the device includes multiple CZT detectors, multiple data processing units, multiple window Acquisition Circuits, multiple counting units and processor；Multiple CZT detectors connect one to one with multiple data processing units；Multiple data processing units connect one to one with multiple window Acquisition Circuits；Multiple window Acquisition Circuits connect one to one with counting unit；Wherein, window Acquisition Circuit includes multiple acquisition modules, and each acquisition module is connected using parallel way；Counting unit includes multiple count sub-elements, and count sub-element is connected one to one with acquisition window module, and processor is connected with multiple counting units.The utility model is improved subsequent conditioning circuit for CZT detector, while acquisition window width is reduced, increases the quantity of acquisition window, solves the problems, such as that detection efficient is low and spatial resolution difference.
Description
Technical field
Medicine imaging technique field is the utility model is related to, scanning means is remained more particularly, to a kind of radiation and is
System.
Background technology
At present, high energy element is more and more extensive in the application of nuclear medicine, such as iodine -131 element, especially should by iodine -131
For thyroid disease, as iodine -131 total body opacification, iodine -131 remove thyroid cancer after the diagnostic total body opacification of iodine -131, treatment
Postoperative Residual parathyroid tissue and treatment recurrence and transfer tissue etc., evident in efficacy, safe ready, therefore be that China develops most
Fast radionuclide therapy project.
Patient after being treated with iodine -131 needs to carry out the monitoring of dose of radiation residual, preferably to be seen to the state of an illness
Examine and analyze.At present, nuclear medicine obtains distributed image of the iodine -131 in human body by gamma-rays imaging technique.Due to iodine -131
Nucleic decays once in human body, has γ particles to discharge, direction is random.The γ particles of face detector direction pass through people
After body, will be captured by crystal and discharge a number of photon, photoelectric sensor by converting photons into electronics, with current impulse
Form be output to pre-amplification circuit.By integrating circuit, current signal is converted into voltage signal.Wherein, γ particles
Capacity of water and photon numbers, voltage signal magnitude are linearly related.After said process, corresponding to image picture on position
Face increases a counter.With the increase of acquisition time, the counting of image diverse location is continuously increased.Each position counting value
Size it is linearly related with human body correspondence position iodine -131 quantity.So, after count value being converted into gray level image, it is
Distributed image of the iodine -131 in human body.
Specifically, in the γ particles that iodine -131 discharges, the main particle for including two kinds of energy：284keV and 365keV,
And the branching ratio very little (can ignore during actual acquisition) of the particle (80keV and 723keV) of other two kinds of energy.
During actual detection, after the γ particles of identical energy are collected, the spike of a normal distribution is formed.Peak value half position
The ratio of width and peak value is energy resolution described among nuclear physics, and generally, energy peak is narrower, energy point
Resolution numerical value is smaller, then energy resolution performance is better.
The direction of iodine -131 release γ particles is random, and after encountering object Compton scattering can occur for the γ particles discharged.
It is Compton platform on the left of full energy peak, the Compton platform is due to Kang Pu in the energy spectrum diagram for the γ particles that iodine -131 discharges
Caused by scattering effect of pausing, gamma-rays caused by the γ particles after scattering is not that we are needed, it is necessary in subsequent conditioning circuit part
Set and filtered by window, the iodine -131 distributed image that ultimately generates otherwise can be caused smudgy, influence image space
Resolution ratio.In order to improve collecting efficiency, the gamma-rays of various energy is all collected, it is necessary to suitably increase window in circuit
Width.Simultaneously, it is contemplated that low energy 284Kev gamma-rays quantity is on the low side, and its contribution in power spectrum falls into Compton platform
In, therefore, 284KeV gamma-ray energy peak is difficult to be distinguished from Compton platform.So, after the width increase of window,
The invalid gamma-rays of scattering is designated as effective gamma-ray quantity can also increase therewith, eventually affect image space resolution
Rate.In summary, the problem of existing residual scanning means still suffers from low detection efficient and spatial resolution difference.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of radiation residual scanning means and system, for CZT
Detector is improved to subsequent conditioning circuit, while acquisition window width is reduced, increases the quantity of acquisition window, solves spy
The problem of surveying low efficiency and spatial resolution difference, improves the detection efficient of detector, improves image spatial resolution.
In a first aspect, the utility model embodiment provides a kind of radiation residual scanning means, described device includes more
Individual CZT detector, multiple data processing units, multiple window Acquisition Circuits, multiple counting units and processor；
Multiple CZT detectors connect one to one with multiple data processing units；Multiple data processings
Unit connects one to one with multiple window Acquisition Circuits；Multiple window Acquisition Circuits and multiple counting units
Connect one to one；
The CZT detector receives patient and captures the gamma-rays that patient's body is sent, and discharges photon and is imitated by photoelectricity
Should or Compton effect, excite electronics to form current signal, and send the current signal to the data processing unit；
The data processing unit receives the current signal, and the current signal is converted into voltage pulse signal, and
The voltage pulse signal is sent to the window Acquisition Circuit；
The window Acquisition Circuit receives the voltage pulse signal, the voltage pulse signal is carried out window collection with
Counting pulse signal is generated, the counting pulse signal is sent to the counting unit, wherein, the window Acquisition Circuit bag
Multiple acquisition modules are included, each acquisition module is connected using parallel way, for gathering the voltage arteries and veins of different amplitudes
Rush signal；
The counting unit includes multiple count sub-elements, and the count sub-element corresponds with the acquisition module to be connected
Connecing, the count sub-element receives the counting pulse signal, and the counting pulse signal is carried out to count to get count value,
The count value is sent to the processor；
The processor is connected with each count sub-element, the processor reception count value, and according to
The count value generation body radioactivity material distribution gray level image.
With reference in a first aspect, the utility model embodiment provides the first possible embodiment of first aspect, its
In, multiple CZT detectors are set in linear arrays.
With reference in a first aspect, the utility model embodiment provides second of possible embodiment of first aspect, its
In, each data processing unit includes amplifier and integrator, the CZT detector, the amplifier, the integration
Device and the window Acquisition Circuit are sequentially connected with.
With reference in a first aspect, the utility model embodiment provides the third possible embodiment of first aspect, its
In, the acquisition module includes the high threshold voltage comparator being connected in parallel and low threshold voltage comparator；
The count sub-element includes two counters, and the high threshold voltage comparator is compared with the low threshold voltage
Device connects one to one with the counter respectively.
With reference to second of possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Four kinds of possible embodiments, wherein, the data processing unit also includes pulse shaper, the pulse shaper
Input is connected with the output end of the integrator, and the output end of the pulse shaper is defeated with the window Acquisition Circuit
Enter end connection.
With reference in a first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect, its
In, described device also includes collimater, and the collimater is provided with multiple passages, and each passage is visited with each CZT
Survey device to connect one to one, the passage captures the gamma-rays, so that the gamma-rays is transmitted to the CZT detector.
With reference in a first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect, its
In, described device also includes display, and the display is connected with the processor, for receiving and showing the radiation in vivo
Property material distribution gray level image.
With reference to the third possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Seven kinds of possible embodiments, wherein, described device also includes latch, the latch and the counter, the processing
Device connects；
The count value that counter described in the latches is sent, and the count value is transmitted to described
Processor is handled.
Second aspect, the utility model embodiment also provide a kind of radiation residual scanning system, and the system includes：Bottom
Seat, supporter, height detection device, lowering or hoisting gear and the radiation residual as described in any embodiment of first aspect are swept
Imaging apparatus；
Wherein, the base is connected with the supporter, for carrying the patient in standing state, the height inspection
Survey device and be installed on the supporter, for detecting the height of the patient；
The height detection device is connected with the processor, and the processor is additionally operable to receive the height, according to institute
State height and determine initial sweep position and terminal scan position, and send drive signal to the lowering or hoisting gear；
The lowering or hoisting gear can be installed on the supporter up or down, and the radiation residual scanning means is installed on
In the lowering or hoisting gear；The lowering or hoisting gear electrically connects with the processor, for being put according to drive signal drive
Thing residual scanning means is penetrated to move up and down.
With reference to second aspect, the utility model embodiment provides the first possible embodiment of second aspect, its
In, the system also includes the velocity sensor electrically connected with the processor, and the velocity sensor is installed on the lifting
Device, sent for gathering the translational speed of the lowering or hoisting gear, and by the translational speed to the processor.
The utility model embodiment brings following beneficial effect：Radiation provided by the utility model remains scanning means
Including multiple CZT detectors, multiple data processing units, multiple window Acquisition Circuits, multiple counting units and processor；It is more
Individual CZT detector connects one to one with multiple data processing units；Multiple data processing units and multiple window Acquisition Circuits
Connect one to one；Multiple window Acquisition Circuits connect one to one with counting unit；Wherein, window Acquisition Circuit includes multiple
Acquisition module, each acquisition module are connected using parallel way；Counting unit includes multiple count sub-elements, count sub-element with
Acquisition module is connected one to one, and processor is connected with multiple count sub-elements.The utility model collects CZT detector
Current signal, voltage pulse signal is generated after data processing unit is handled, then each collection in window Acquisition Circuit
Module is acquired to voltage pulse signal, voltage pulse signal is separated into the counting pulse signal of different amplitudes, by counting
Subelement carries out counting to get multiple count values respectively to individual count pulse signal, and last processor is according to individual count number
Value generation body radioactivity material distribution gray level image.Wherein, in acquisition module the size of acquisition window according to CZT detector
Energy resolution is set, and so because CZT detector has preferable energy resolution, can set narrow collecting window
Mouthful, while increase the quantity of acquisition window, solve the problems, such as that detection efficient is low and spatial resolution difference, improve detector
Detection efficient, improve image spatial resolution.
Other feature and advantage of the present utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that the radiation that the utility model embodiment provides remains scanning means；
Fig. 2 is the structural representation that the radiation that the utility model embodiment provides remains data processing unit in scanning means
Figure；
Fig. 3 is that the radiation that the utility model embodiment provides remains window Acquisition Circuit and counting unit in scanning means
Connection diagram；
Fig. 4 is the circuit connection diagram that the radiation that the utility model embodiment provides remains acquisition module in scanning means；
Fig. 5 is the structural representation that the radiation that the utility model embodiment provides remains scanning system.
Icon：
100-CZT detectors；200- data processing units；210- amplifiers；220- integrators；230- shaping pulses electricity
Road；300- window Acquisition Circuits；400- counting units；500- processors；51- bases；52- supports body；53- top plates；54- liters
Falling unit；55- radiations remain scanning means.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing to this
The technical scheme of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Apply example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.
Existing residual scanning means still suffers from that detection efficient is low and the problem of spatial resolution difference at present, based on this, this reality
A kind of radiation residual scanning means and system provided with new embodiment, changes for CZT detector to subsequent conditioning circuit
Enter, while acquisition window width is reduced, increase the quantity of acquisition window, it is low poor with spatial resolution to solve detection efficient
The problem of, the detection efficient of detector is improved, improves image spatial resolution.
For ease of understanding the present embodiment, a kind of radiation disclosed in the utility model embodiment is remained first
Scanning means describes in detail.
Embodiment one：
Fig. 1 is the structural representation that the radiation that the utility model embodiment provides remains scanning means, as shown in figure 1,
The device includes multiple CZT (cadmium-zinc-teiluride, CdZnTe) detector 100, multiple data processing units 200, multiple windows collection electricity
Road 300, multiple counting units 400 and processor 500.Specifically, multiple CZT detectors 100 and multiple data processing units
200 connect one to one；Multiple data processing units 200 connect one to one with multiple window Acquisition Circuits 300；Multiple windows
Acquisition Circuit 300 connects one to one with multiple counting units 400.
CZT detector 100 captures the gamma-rays that patient's body is sent, and discharges photon and by photoelectric effect or Kang Pu
Effect, excites electronics to form current signal, and send the current signal to data processing unit 200.Specifically, patient is led to
Cross iodine -131 treatment after, iodine -131 patient's body release all directions gamma-rays, gamma-rays by material and with atom phase
Interaction discharges γ photons, and then γ photons pass through photoelectric effect, by all energy transfers to bound electron, shake off electronics
Atom is fettered and launched, while photon disappears in itself, or γ photons pass through Compton effect, with free static electronics
Collide, electronics is turned into recoil electron, γ photons are scattered, and change original energy and direction.It is above-mentioned excite from
By electronically forming current signal, transmit to data processing unit 200.Preferably, in order to facilitate subsequent treatment, multiple CZT detections
Device 100 is set in linear arrays.
After data processing unit 200 receives current signal, current signal is converted into voltage pulse signal, concurrent power transmission pressure
Pulse signal is to window Acquisition Circuit 300.
Preferably, as shown in Fig. 2 each data processing unit 200 includes amplifier 210 and integrator 220, CZT is visited
Device 100, amplifier 210, integrator 220 and window Acquisition Circuit 300 is surveyed to be sequentially connected with.Current signal first passes around amplifier
Current amplifier signal is generated after 210 amplifications, amplifier 210 sends the Current amplifier signal to integrator 220.Integrator 220 is right
Current amplifier signal carries out integration generation voltage pulse signal, then sends the voltage pulse signal to window Acquisition Circuit
300。
Further, voltage pulse signal is accurately gathered for the ease of subsequent window Acquisition Circuit 300, one
In individual embodiment, data processing unit 200 also includes pulse shaper 230, the input and integration of pulse shaper 230
The output end connection of device 220, the output end of pulse shaper 230 are connected with the input of window Acquisition Circuit 300.
The receiving voltage pulse signal of window Acquisition Circuit 300, window collection is carried out to the voltage pulse signal in terms of generating
Number pulse signal, counting pulse signal is sent to counting unit 400.It is considered that the γ comprising multiple kinds of energy is penetrated in iodine -131
Line, in order to count effective gamma-rays of more different-energies as far as possible, as shown in figure 3, window Acquisition Circuit 300 includes
Multiple acquisition modules, each acquisition module is connected using parallel way, for gathering the voltage pulse signal of different amplitudes, so as to
It can separate and gather the gamma-rays (gamma-rays that such as energy is 365KeV and 284KeV) of corresponding different-energy, therefore, improve
The detection efficient of CZT detector 100.
Specifically, the width size of acquisition window can be according to the energy resolution of CZT detector 100 in each acquisition module
Rate adjusts, because CZT detector 100 has good energy resolution, you can to obtain the energy peak of narrower in width, therefore respectively
Individual acquisition module, so as to collect most of effective gamma-rays, can reduce invalid γ with the narrow acquisition window of design comparison
The collection of ray (such as the gamma-rays after scattering), reduces influence of the invalid gamma-rays to image spatial resolution.For example, fall into
After the 284KeV of Compton platform gamma-rays is by setting narrow acquisition window, the utility model can be in mistake as far as possible
Filter it is invalid it is gamma-ray in the case of, collect most of effective 284KeV gamma-rays, differentiated so as to improve image space
Rate.
Further, counting unit 400 includes multiple count sub-elements, and count sub-element corresponds with acquisition module to be connected
Connect, count sub-element count pick up pulse signal, counting pulse signal is carried out to count to get count value, and send the counting
Numerical value is to processor 500.
Preferably, in one embodiment, acquisition module includes the high threshold voltage comparator and Low threshold being connected in parallel
Voltage comparator, count sub-element include two counters, high threshold voltage comparator and low threshold voltage comparator respectively with
Counter connects one to one.
Fig. 4 shows the circuit connection of acquisition module in the radiation residual scanning means that the utility model embodiment provides
Figure, as shown in figure 4, each voltage pulse signal S is respectively sent to low threshold voltage comparator U9A and high threshold voltage comparator
U9B inverting input.Meanwhile two voltage signal low threshold voltage V_L and high threshold voltage V_H are inputted to low-threshold power
Press comparator U9A and high threshold voltage comparator U9B in-phase input end.It is assumed that low threshold voltage V_L and high threshold voltage V_
H is respectively 3V, 5V, when voltage pulse signal S is higher than low threshold voltage 3V, low threshold voltage comparator U9A output high level,
Otherwise low level is exported；When voltage pulse signal S is higher than high threshold voltage 5V, the high electricity of high threshold voltage comparator U9B outputs
It is flat, otherwise export low level.Thus, the low and high level of low threshold voltage comparator U9A and high threshold voltage comparator U9B outputs
Two different counting pulse signal S_L, S_H are formed respectively, with low threshold voltage comparator U9A and high threshold voltage comparator
The counter of U9B connections counts to the two counting pulse signals S_L, S_H respectively, obtains two count values, this two
The counting of " window " between the difference of individual count value, as high-low threshold value 3-5V.Wherein, above-mentioned voltage signal can be by DAC cores
Piece exports.
Processor 500 is connected with individual count subelement, and processor 500 receives the individual count in individual count subelement
The count value that device is sent, and body radioactivity material distribution gray level image is generated according to count value.
In above-described embodiment, said apparatus also includes collimater, and collimater is provided with multiple passages, each passage with it is each
CZT detector 100 connects one to one, for capture gamma-ray, so that gamma-rays is transmitted to CZT detector 100.Specifically,
Multiple passages can receive the gamma-rays of patient's any part transmitting.Each passage only receives parallel with collimater penetrate
Line, for having the ray at angle of inclination with collimater, each passage is without receiving, i.e., collimater serves standard to ray
Straight effect.Preferably, collimater is that can be applied to the collimater of high energy element.
Further, said apparatus also includes display, and display is connected with processor 500, for receiving and showing place
Manage device 500 send inside radioactive substance distribution gray level image, so as to intuitively see radioactive substance in vivo
Distribution situation.
In one embodiment, it is contemplated that the asynchronous problem of processor 500 and counter data exchange velocity, above-mentioned dress
Putting also includes latch, and the latch is connected with counter, processor 500.The count value that latches counter is sent,
And count value is transmitted to processor 500 and handled.Specifically, processor 500 include memory cell, reading unit and
Computing unit.Latch latches count value under control of the control signal, and count value is sent to the storage of processor 500
In unit, count value is read from memory cell by the reading unit of processor 500, and transmit count value to processor
500 computing unit carries out analysis calculating.
Radiation residual scanning means provided by the utility model includes multiple CZT detectors 100, multiple data processing lists
Member 200, multiple window Acquisition Circuits 300, multiple counting units 400 and processor 500；Multiple CZT detectors 100 with it is multiple
Data processing unit 200 connects one to one；Multiple data processing units 200 correspond with multiple window Acquisition Circuits 300
Connection；Multiple window Acquisition Circuits 300 connect one to one with counting unit 400；Wherein, window Acquisition Circuit 300 includes more
Individual acquisition module, each acquisition module are connected using parallel way；Counting unit 400 includes multiple count sub-elements, counts son
Unit is connected one to one with acquisition module, and processor 500 is connected with multiple count sub-elements.The utility model detects CZT
The current signal that device 100 collects, voltage pulse signal is generated after the processing of data processing unit 200, then window gathers
Each acquisition module in circuit 300 is acquired to voltage pulse signal, and voltage pulse signal is separated into different amplitudes
Counting pulse signal, individual count pulse signal is carried out respectively by count sub-element to count to get multiple count values, finally
Processor 500 is distributed gray level image according to individual count numerical generation body radioactivity material.Wherein, collecting window in acquisition module
The size of mouth is set according to the energy resolution of CZT detector 100, so because CZT detector 100 is with preferable energy point
Resolution, narrow acquisition window can be set, while increase the quantity of acquisition window, solve that detection efficient is low and space point
The problem of resolution difference, the detection efficient of detector is improved, improves image spatial resolution.
Embodiment two：
Fig. 5 shows the structural representation for the radiation residual scanning system that the utility model embodiment provides, such as Fig. 5 institutes
Show, the system includes：Radiation in base 51, supporter, height detection device, lowering or hoisting gear 54 and such as embodiment one is residual
Stay scanning means 55；
Wherein, base 51 is connected with supporter, for carrying the patient in standing state, height detection device installation
In supporter, for detecting the height of patient.The height detection device is connected with processor 500, and processor 500 receives above-mentioned body
Height, and initial sweep position and terminal scan position are determined according to the height, to send drive signal to lowering or hoisting gear 54.
Specifically, radiation residual scanning means 55 is mountable in lowering or hoisting gear 54, lowering or hoisting gear 54 can move up and down
Ground is installed on supporter, and is electrically connected with processor 500, for driving radiation residual scanning means according to above-mentioned drive signal
55 move up and down.
Further, as shown in figure 5, supporter can include：Support body 52 and top plate 53.Wherein, body 52 is supported
First end (lower end shown in Fig. 5) be connected with base 51, support body 52 the second end (upper end shown in Fig. 5) and top plate
53 are connected, and top plate 53 is oppositely arranged with base 51.Specifically, support body 52 is located between top plate 53 and base 51, is propped up
Support body 52 has preset height, and the preset height can be determined according to actual conditions, but the patient of different heights should be made equal
It can stand between base 51 and top plate 53.Hollow cavity, lowering or hoisting gear 54 and radiation can be provided with support body 52
Thing residual scanning means 55 is mounted in hollow cavity.
When it is implemented, patient stand is in base 51, and remain stationary as state.Height detection device detects the body of patient
Height, and the height detected is sent to processor 500, processor 500 receives the height, and determines that starting is swept according to the height
Position and terminal scan position are retouched, and sends drive signal.The drive signal that the reception processing device 500 of lowering or hoisting gear 54 is sent,
And scan position to terminal is moved from initial sweep position according to drive signal.Because radiation residual scanning means 55 is installed on
Lowering or hoisting gear 54, so the mobile drive radiation residual scanning means 55 of lowering or hoisting gear 54 is moved to end by initial sweep position
Spot scan position.Radiation residual scanning means 55 follows lowering or hoisting gear 54 to move scan position to terminal by initial sweep position
During, the body of the patient corresponding to all opening positions between initial sweep position to terminal scan position is carried out in fact
When scan, and the gamma-rays received is passed through into Treatment Analysis, is converted into count value, sent out count value as scanning result
Deliver to processor 500.Processor 500 receives the scanning result, and generates internal radiation residual distribution according to the scanning result
Gray level image.After scanned, patient can leave base 51.
Specifically, quantity and the scanning of the CZT detector 100 of linear array are formed in radiation residual scanning means 55
Speed can determine according to the image pixel of user's request.For example, the pixel of image is 100*800, then 100 can be set
CZT detector 100 forms array, opens radiation residual scanning means 55, and the radiation remains scanning means 55 and filled in lifting
Put under 54 drive according to certain speed, moved at predetermined time intervals once since initial sweep position, until mobile 800
Secondary scan position to terminal, completes whole scanning process, and so, processor 500 is handled each scanning result, and is reflected
It is mapped at the respective pixel point of image, radiation residual distribution gray level image inside generation accordingly.
Further, in order to preferably realize to radiation residual scanning means 55 translational speed control, above-mentioned system
System also includes the velocity sensor electrically connected with processor 500, and the velocity sensor is installed on lowering or hoisting gear 54, risen for gathering
The translational speed of falling unit 54, and translational speed is sent to processor 500.Processor 500 sends speed according to the translational speed
Degree regulating command to lowering or hoisting gear 54, lowering or hoisting gear 54 moves according to the speed regulating command according to certain speed.This
Sample, processor 500 realize automatically controlling to lowering or hoisting gear 54.
The radiation residual scanning system that the utility model embodiment provides, is remained with the radiation that above-described embodiment provides
Scanning means has identical technical characteristic, so can also solve identical technical problem, reaches identical technique effect.
It is apparent to those skilled in the art that for convenience and simplicity of description, the radiation of foregoing description
Thing remains the specific work process of scanning means and system, may be referred to the corresponding process in preceding method embodiment, herein not
Repeat again.
In addition, in the description of the utility model embodiment, unless otherwise clearly defined and limited, term " installation ",
" connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected
Connect；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the utility model.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical scheme of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing
The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill
For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme
Enclose, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model described should be wanted with right
The protection domain asked is defined.
Claims (10)
1. a kind of radiation remains scanning means, it is characterised in that including multiple CZT detectors, multiple data processing units, more
Individual window Acquisition Circuit, multiple counting units and processor；
Multiple CZT detectors connect one to one with multiple data processing units；Multiple data processing units
Connected one to one with multiple window Acquisition Circuits；Multiple window Acquisition Circuits and multiple counting units are one by one
Corresponding connection；
The gamma-rays that the CZT detector capture patient's body is sent, discharges photon and by photoelectric effect or Compton
Effect, electronics is excited to form current signal, and send the current signal to the data processing unit；
The data processing unit receives the current signal, the current signal is converted into voltage pulse signal, and send
The voltage pulse signal is to the window Acquisition Circuit；
The window Acquisition Circuit receives the voltage pulse signal, and window collection is carried out to the voltage pulse signal to generate
Counting pulse signal, the counting pulse signal is sent to the counting unit, wherein, the window Acquisition Circuit includes more
Individual acquisition module, each acquisition module are connected using parallel way, and the voltage pulse for gathering different amplitudes is believed
Number；
The counting unit includes multiple count sub-elements, and the count sub-element connects one to one with the acquisition module,
The count sub-element receives the counting pulse signal, and the counting pulse signal is carried out to count to get count value, sends out
The count value is sent to the processor；
The processor is connected with each count sub-element, and the processor receives the count value, and according to described
Count value generation body radioactivity material distribution gray level image.
2. device according to claim 1, it is characterised in that multiple CZT detectors are set in linear arrays.
3. device according to claim 1, it is characterised in that each data processing unit includes amplifier and product
Divide device, the CZT detector, the amplifier, the integrator and the window Acquisition Circuit are sequentially connected with.
4. device according to claim 1, it is characterised in that the acquisition module includes the high threshold voltage being connected in parallel
Comparator and low threshold voltage comparator；
The count sub-element includes two counters, the high threshold voltage comparator and the low threshold voltage comparator point
Do not connected one to one with the counter.
5. device according to claim 3, it is characterised in that the data processing unit also includes pulse shaper,
The input of the pulse shaper is connected with the output end of the integrator, the output end of the pulse shaper and institute
State the input connection of window Acquisition Circuit.
6. device according to claim 1, it is characterised in that also including collimater, the collimater is provided with multiple logical
Road, each passage connect one to one with each CZT detector, and the passage captures the gamma-rays, so that institute
Gamma-rays is stated to transmit to the CZT detector.
7. device according to claim 1, it is characterised in that described device also includes display, the display and institute
Processor connection is stated, for receiving and showing the body radioactivity material distribution gray level image.
8. device according to claim 4, it is characterised in that described device also includes latch, the latch and institute
State counter, processor connection；
The count value that counter described in the latches is sent, and the count value is transmitted to the processing
Device is handled.
9. a kind of radiation remains scanning system, it is characterised in that the system includes：Base, supporter, height detection dress
Put, lowering or hoisting gear and the radiation as any one of claim 1 to 8 remain scanning means；
Wherein, the base is connected with the supporter, for carrying the patient in standing state, the height detection dress
Put and be installed on the supporter, for detecting the height of the patient；
The height detection device is connected with the processor, and the processor is additionally operable to receive the height, according to the body
Height determines initial sweep position and terminal scan position, and sends drive signal to the lowering or hoisting gear；
The lowering or hoisting gear can be installed on the supporter up or down, and the radiation residual scanning means is installed on described
In lowering or hoisting gear；The lowering or hoisting gear electrically connects with the processor, for driving the radiation according to the drive signal
Residual scanning means moves up and down.
10. system according to claim 9, it is characterised in that the system also includes what is electrically connected with the processor
Velocity sensor, the velocity sensor are installed on the lowering or hoisting gear, for gathering the translational speed of the lowering or hoisting gear, and
The translational speed is sent to the processor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020047838A1 (en) * | 2018-09-07 | 2020-03-12 | Shenzhen Xpectvision Technology Co., Ltd. | A radiation detection apparatus |
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2017
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020047838A1 (en) * | 2018-09-07 | 2020-03-12 | Shenzhen Xpectvision Technology Co., Ltd. | A radiation detection apparatus |
| CN112639531A (en) * | 2018-09-07 | 2021-04-09 | 深圳帧观德芯科技有限公司 | Radiation detection device |
| US11826192B2 (en) | 2018-09-07 | 2023-11-28 | Shenzhen Xpectvision Technology Co., Ltd. | Radiation detection apparatus |
| TWI826502B (en) * | 2018-09-07 | 2023-12-21 | 大陸商深圳幀觀德芯科技有限公司 | Radiation detection apparatus and radiation detection metthod |
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