CN109864751A - A kind of three parts fission full angle meets brain pet detector and integral device - Google Patents
A kind of three parts fission full angle meets brain pet detector and integral device Download PDFInfo
- Publication number
- CN109864751A CN109864751A CN201810785002.4A CN201810785002A CN109864751A CN 109864751 A CN109864751 A CN 109864751A CN 201810785002 A CN201810785002 A CN 201810785002A CN 109864751 A CN109864751 A CN 109864751A
- Authority
- CN
- China
- Prior art keywords
- detection
- pet
- crystal
- detection cavity
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Nuclear Medicine (AREA)
Abstract
A kind of three parts fission full angle meets brain pet detector, and the module of detection containing plural number, each module is made of crystal and photosensor arrays and light guide, and crystal is arranged to the intracavitary direction of detection cavity；The detection cavity with an opening is formed by module is adjacent, detection cavity inner cavity length, width and height are located at below detection cavity no more than 35-50cm, opening；Opening sectional area is greater than person neck in horizontal maximum secting area；Module is divided into three groups, and first, second and third group of PET detection module forms foregoing detection chamber after being correspondingly formed the first, second and third detection cavity segment, the first detection cavity segment and the second detection cavity segment and third detection cavity segment three parts fitting；First, second and third group of PET detection module is respectively non-removably connected at together.Integral device comprising the detector is also provided.
Description
Technical field
The present invention relates to the technical field of pet detector more particularly to a kind of packages not occurred in the prior art
The extremely strong dedicated pet detector of property, a kind of three parts fission full angle meet brain pet detector and integral device.
Background technique
Positron emission tomography (Positron Emission Tomography, hereinafter referred to as PET) equipment is wide
The general specificity imaging applied to animal and human body (hereinafter referred to as sweep object).In PET imaging, need first to scanning pair
As the tracer that injection positron radionuclide marks, then the distribution to tracer in sweep object is imaged, to tracer mark
The imaging high specificity at the position of note, and can be with dynamic imaging, resolution is high, be current highest resolution imaging means it
One.
General PET device thinking is just designed to detector rings, most extension length/depth.Traditional PET device
Detector axial depth it is insufficient, be merely able to the part of scanning finite.This imaging method has two: first, at
Picture speed is slow, and each bed needed between 1-5 minutes, and the axial visual field is in 20cm or so, it is also necessary to the additional calculating time；The
The big advantage of the one of two, PET is exactly the multidate information of available tracer, but the insufficient detector of depth is can not to obtain entirely
The tracer multidate information of body, by taking brain as an example, if it is desired to obtain neck or forehead portion multidate information, then be not
Possible, existing head end detector ring can only obtain the multidate information of head medium position.
The problem of this detector rings design is that the sensitivity in scan vision is not uniform enough, and sensitivity is whole in detector
Body middle highest, as position is moved along axis to detector both ends from center, sensitivity rapid decrease arrives detector
The position at both ends drops to very low degree, and even zero, Fig. 2 is extension PET device in the prior art.
The reason of causing this phenomenon is PET using the data acquisition modes for meeting detection, when two exactly opposite spies
When being detected simultaneously by the gamma ray of 511keV on survey device crystal, referred to as really meet event, it just can be the two gammas
Ray is as an effective positive electron example, and the generation position of this positive electron example is on the straight line between two crystal,
Namely our positions to be detected.This straight line is referred to as response line Line of Reaction, hereinafter referred to as LOR.
Fig. 1 is the LOR schematic diagram of pet detector in the prior art, and two generation position versus obviously can see in figure,
One position in detector axis to the center in the visual field, a position not the axial visual field center and in edge, due to position
The probability very different being detected for setting the different LOR for causing to occur from different location, for being sent out from the generation position at center
The raw LOR overwhelming majority, can only be detected if it were not for level or close to level, occur what position occurred from edge
LOR only have it is some vertical or be approximately perpendicular to it is axial can just be detected, can be detected from non-central hair
The LOR quantity of raw position is significantly lower than the LOR quantity of central point, this also has led to deviateing the center LOR, spirit with generation position
Sensitivity is lower and lower.The sensitivity at any point is determined by the solid angle that all LOR for passing through the point are covered in the visual field PET
Fixed, the solid angle of LOR covering is bigger, and the sensitivity of the point is bigger, and the relationship of this sensitivity and position is as shown in Fig. 2, more lean on
Nearly center of gravity sensitivity is higher, otherwise edge sensitivity is very low.
Clinical whole body PET device is since aperture is big, and on the one hand its sensitivity is too low, leads to the sweep time of single bed
Usually several minutes, on the other hand simultaneously because the gamma ray that generates of positron annihilation is to non co-linearity (non-itself
Collinearity) spatial resolution is caused to be restricted, it is caused to be unsuitable for the dedicated test of brain.Cause this phenomenon
The reason is that PET is using meeting the data acquisition modes of detection, it is detected simultaneously by when on two exactly opposite detector crystal
When the gamma ray of 511keV, referred to as really meet event, just can using the two gamma rays as one it is effective just
Electronics example, the generation position of this positive electron example is on the straight line between two crystal, that is, our portions to be detected
Position.This straight line is referred to as response line Line of Reaction, hereinafter referred to as LOR.Fig. 1 is pet detector in the prior art
LOR schematic diagram, two generation position versus obviously can see in figure, a position in detector axis to the center in the visual field,
One position not the axial visual field center and in edge, since position difference leads to the LOR's occurred from different location
The probability very different being detected, for the LOR overwhelming majority that position occurs and occurs from center, only if it were not for horizontal or
It can be detected close to level, the LOR that position generation occurs from edge only has some vertical or is approximately perpendicular to axial direction
Can just be detected, what can be detected is significantly lower than the LOR of central point from the LOR quantity of non-central generation position
Quantity, this also has led to the position deviation center LOR occurs, and sensitivity is lower and lower.Any point in the visual field PET
Sensitivity is determined that the solid angle that LOR is covered is bigger by the solid angle that is covered of all LOR for passing through the point, the point it is sensitive
Degree is bigger, and the relationship of this sensitivity and position is as shown in Fig. 2, on the contrary edge sensitivity higher closer to center of gravity sensitivity
It is very low.Simultaneously as the detector rings for being generally used for detection body are too big, if being used to detect brain, actually effectively
Sensitivity angle is very small, may only have between 5-10 °, and the corresponding image information of the LOR also caused is considerably less, substantially
Effective identifiable PET image information can not be formed.
Thereby produce dedicated brain PET device.The aperture ratio whole body PET of dedicated brain PET device is much smaller, thus effectively
Reduce influence of the Non-collinearity to resolution ratio.At the same time, it is attempted to propose various solutions to improve
The sensitivity of PET device.There are two ways to improving sensitivity increases the thickness of detector and increases the solid angle of detector.
Since the thickness increase of detector will lead to the accuracy decline (Parallel Error) of gamma ray positioning, to reduce space
Resolution ratio, therefore the solid angle for improving detector becomes an even more important means.
Existing brain PET design is mainly include the following types: helmet-like brain PET:US7884331B2, the detection of this design
Device is used in the similar annular design of systemic PET, and detector rings are mounted on the helmet.The design of this detector essence and
The detector design of human body PET is identical, is all annular detector, and main innovation is the mounting means of detector rings, due to visiting
Survey the smaller of device ring design, closer to head, can obtain it is certain effect improved, but since helmet portion above is only to use
In wearing, without probe functionality, then there is no substantial technological progress in fact.For in terms of the effective sensitivity angle, 360 °
30-40 ° or so is also just at most covered, 11/12 LOR is detected again without method.
The addition of inward slant detector: US9529100B2 in the document, increases in the top of traditional detector rings
Intilted top detector array, so as to covering bigger solid angle.But there are two aspects for this design
Problem, first, top detector is not covered with crown position；Second, lower section detector rings are not covered with lower jaw part below,
Therefore its solid angle is still limited.For in terms of the effective sensitivity angle, 360 ° at most also just cover a 80-120 ° of left side
The right side, 2/3 or more LOR are detected again without method.
Supplement chin detector: US9226717B2: detector is divided into helmet-like detector for this invention and chin detects
Two parts of device, by increasing chin detector, so as to cover bigger solid angle.In this invention, in order to eliminate
Patient's puts under house arrest sense, and the lower edge of helmet detector front is above patient's eyes, therefore the front of patient's face does not detect
Device, therefore its sensitivity is still limited.The angle of helmet covering is less than half, and chin detector only has a small pieces, for entirety
The reinforcement of the completion of LOR is very limited, in terms of the effective sensitivity angle for, 360 ° at most also just cover 160-180 °
Left and right, 1/2 or more LOR are detected again without method.In the document, also the chin detector piece is extended,
But extend after detector still, above helmet portion expose eyes, in addition biggish chin piece, actually detected effective angle
Also just at 200 ° or so, still have a large amount of LOR capture less than.
To sum up, brain PET in the prior art, insufficient for the coverage on entire head, sensitivity is uneven, for
The exposed LOR capture in outer portion is ineffective, and the effect difference in terms of generating dynamic image is especially apparent, for above existing skill
Art if we want to obtain the PET dynamic image of buccal portion or brain stem parts, is all for example with the above technology
It less than clear image, is as a result all not used to observe, that is to say, that many regions on head, especially lower half portion are very
The PET image of multizone can not all obtain well.This problem is to rely solely on existing detector rings or helmet-type institute
It is indeterminable, it can not fundamentally solve disposable head PET blur-free imaging or primary entire head PET dynamic imaging
The problem of.
Summary of the invention
Present invention aim to address wrapped not for head/brain pet detector in the presence of the prior art
By force, the problem of overall sensitivity deficiency provides a kind of simplify and perfect PET is visited for the situation of this not effective scheme
Believable full brain PET image can disposably be obtained by the equipment of small size as far as possible under this device by surveying device scheme
The problem of, this mode solved the problems, such as not yet occurs in the prior art, or even does not all propose clearly in the prior art such as
The problem of preceding existing sensitivity defect.The scheme of the application is supplemented detector piece relative to detection or is increased simply
The size of detector rings, more specific aim, more save the cost, compared with the existing technology in the brain PET device that has had, hence it is evident that
Wrapped stronger, high sensitivity, effect is also very good.For how i.e. by simplifying again of doing of brain PET device it is wrapped strong, and also
It is detected suitable for head to be placed therein, the solution that the application provides is by entire head PET detection cavity point
At three parts, two parts become an entire detection cavity by way of split, and the detection cavity formed after such split, opening is only
Be required to the neck of accommodating people, due to thirdly piece piece characteristic, for irregular head, or have disability etc.
The head of reason is detected, compared to one entirety is placed on the detection cavity on head, and seperated is two-part detection cavity,
It is more adaptable, while sensitivity capture can be made to reach new satisfactory degree.Furthermore for specific detection
Head, such as have very long beard, there is very long hair, head to have metal attachments or other attachments that cannot be removed, this
When only can be combined into the chamber with special opening using two parts in three parts, on the one hand meet specific demand, on the one hand
Sensitivity is relevant wrapped, still has the LOR of 65-70% that can be caught in, makes adaptability and high sensitivity to the maximum extent
It coexists simultaneously.
A kind of three parts fission full angle meets brain pet detector, it is characterised in that: detects mould comprising a plurality of PET
Part, each PET detection module are made of PET crystal detection and photosensor arrays and light guide, and PET crystal detection is to spy
Survey the intracavitary direction arrangement of chamber；The detection cavity with an opening, the detection cavity are formed by a plurality of PET detection modules are adjacent
No more than 35-50cm, the opening of the detection cavity is located at below detection cavity the length, width and height of inner cavity；The opening sectional area is greater than people
The maximum secting area of neck in the horizontal direction；A plurality of PET detection modules are divided into three groups, and first group of PET detects module
The first detection cavity segment is formed, second group of PET detection module forms the second detection cavity segment, and third group PET detection module is formed
Third detects cavity segment, the first detection cavity segment and the second detection cavity segment and third detection cavity segment three parts patch
Foregoing detection chamber is formed after conjunction；First group of PET detection module is non-removably connected at together；Second group of PET detects module
It is non-removably connected at together；Third group PET detection module is non-removably connected at together；First detection cavity
Part is by the first support member support；Second probe portion is by the second support member support；The third probe portion by
Third support member support.
The first substitution detection cavity is formed after the first detection cavity segment and the second detection cavity segment two parts fitting；
The second substitution detection cavity is formed after the first detection cavity segment and third detection cavity segment two parts fitting；This first is replaced
Such degree is reached to the detection coverage for really meeting event for detection cavity or the second substitution detection cavity, from the detection
What chamber center occurred really meets event, and at least 65-70% is visited by aforementioned first substitution detection cavity or the second substitution detection cavity
It measures.
The first detection cavity segment and the second detection cavity segment and third detection cavity segment can be respectively first
Any angle is rotated under the support of supporting member and the second supporting member and third supporting member or is translated to any direction；Packet
It, should including including the gap that the first detection cavity segment and the second detection cavity segment and third detection cavity segment are bonded two-by-two
All free cross-sections product of detection cavity is respectively less than the 1/2-1/3 of minimum one area in aforementioned PET crystal detection；Detection cavity
Such degree is reached to the detection coverage for really meeting event, what is occurred from the detection cavity center really meets event, until
Few 80-85% is detected by aforementioned complex PET detection module；The PET crystal detection of the joint place of first probe portion
Edge formed contour line and second probe portion joint place PET crystal detection edge formed contour line and
The contour line that the edge of the PET crystal detection of the joint place of the third probe portion is formed, is respectively positioned on some single plane
It is interior or in some single curved surface or be located in one or more planes or one or more curved surface.
The contour line is located in some single plane；The shape of the detection cavity is spherical, ellipsoid；The ball
The axis of shape, in particular to all PET detection module passes through the centre of sphere, and the inner surface of all PET detection module is to the centre of sphere
It is equidistant；The ellipsoid, in particular to the detection cavity inner cavity form the ellipsoid of c > a=b.
The detection cavity is spliced by the part of two different geometries in top and body portion on the whole；The body portion
Shape be following shape one of which: a part of shape in spherical centre or the elliposoidal of c > a=b removal top and
The shape of each a part in bottom, or positive polygon prism shape or it is cylindric or up big and down small it is round table-like or upper it is small under
Big round table-like or up big and down small positive multi-prism taper or up-small and down-big positive multi-prism taper；The top is planar
The inner cavity at end cap top is a part of spherical surface or the inner cavity at top is the ellipsoid that a:b:c is arbitrary proportion
A part；The maximum continuous gap formed between the top and body portion is again smaller than minimum one in aforementioned PET crystal detection
The 1/2-1/3 of a area.
Coincident circuit is all connected between every two PET detection module；The specific configuration of each PET detection module
For, be disposed with probe body, photosensor arrays, light guide, PET crystal detection from outside to inside, light guide both with photoelectricity
Sensor array close-coupled, also with PET crystal detection close-coupled；The PET crystal detection material is scintillation crystal, the sudden strain of a muscle
Bright crystal is made of 1 or 1 or more crystal block；The positive polygon prism is regular hexagonal prism or positive eight prism, described just more
Pyramid is positive rectangular pyramid or positive hexagonal pyramid；It is close to the barricade that the body subordinate edge is attached with circular ring type, the material of the barricade
Matter is stainless steel or boron-containing plastic or leaded plastic, and the barricade matches the segmentation form in fit portion, by several pieces of scoreboards
Be spliced an entire annulus.
The front of the detection cavity several PET detection module on the upper side is removed, and is formed one and is observed outward suitable for eyes
Opening；Aforementioned several pieces of scoreboards can be three pieces of scoreboards, the decomposition knot corresponding to first, second, third group of PET detection module
Structure is simultaneously respectively attached to below first, second, third group of PET detection module.
The inside face of the PET crystal detection is plane or almost plane, and shape is square or rectangle；It is described
Crystal block, the crystal strip array being specifically made of a plurality of crystal items or by the crystal of 1 or 1 or more integral cutting
Composition；The material of the scintillation crystal is selected from bismuth germanium oxide (BGO) crystal, sodium iodide (NaI) crystal, NaI (Tl) monocrystalline crystal, silicon
The one or more of them of sour lutetium (LSO) crystal, gadolinium siliate (GSO) crystal, yttrium luetcium silicate (LYSO)；In each detection module ring
Between be installed between partition made of high z number material or part detection module ring and be installed with high z number material
Partition is not installed between manufactured partition or all detection module rings；The high z number material is lead or tungsten；It is described
Positive polygon prism is regular hexagonal prism or positive eight prism, and the regular polygon is regular hexagon or octagon.
The crystal strip array is made of a plurality of crystal items；Described 1 or 1 or more crystal block, each is brilliant
Body block is made of the crystal of 1 or 1 or more integral cutting.
Also there is the first power supply circuit and the second power supply circuit and third power supply circuit, the first communication line and the second communication
Route and third communication line, a PC terminal；Have PET signal acquisition and operational analysis system in the PC terminal；First confession
Circuit provides the electric energy under voltage rating to first supporting member and first group of PET detection module, second power supply
Circuit provides the electric energy under voltage rating, third power supply electricity to second supporting member and second group of PET detection module
Road provides the electric energy under voltage rating to the third supporting member and third group PET detection module；First communication line
Detection signal is received from first group of PET detection module, which receives detection letter from second group of PET detection module
Number, which receives detectable signal from third group PET detection module, the first communication line and the second communication line and
The signal that third communication line receives sends aforementioned PET signal acquisition and operational analysis system to.
It is an advantage of the invention that can be mainly divided at 3 points, first is that for the PET device using general inspection whole body and
Speech, real crystal used is also relatively fewer, but realize extraordinary detection effect, can not only for head once clearly at
Picture, or even the dynamic image on entire head can be once formed, and keep expensive crystal dosage less, very economical, Er Qieshi
Existing effect is very good.Second is that the pet detector of existing some brains, but its mentality of designing is still influenced by old mode,
Not only design method specific aim is not strong, but also is not concerned with and captures the inadequate problem of degree for head overall sensitivity,
It is very again in particular for head lower half portion, but for the picture catching in oral cavity, nasopharynx, brain stem portion in lower half portion
Important, thus meaning of the present invention is great.Third is that application mode, the application is manufactured in most simple intensive mode, is only formed
One cavity, such as by entangling head from top to down, the PET scan on head can be completed, this mode is not only simple and effective,
It and since it is designed that three parts are seperated, can merge, in adaptability in use, be divided into three parts and merge and utilize, compared with
A part of and two-part adaptability is eager to excel, and is adapted to the complicated state on head, is having special part that cannot apply test chamber
When package, two parts can be applicable in and wrapped up, still be able to capture 2/3 or so LOR, detection sensitivity is still higher.On
State is that prior art nobody expects that also nobody accomplishes.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram that the LOR of different test points can be caught in axially prolonged detector rings；
Fig. 2 is the axially prolonged detector rings schematic diagram different for internal each position sensitivity；
Fig. 3 is the schematic diagram of helmet-like brain PET；
Fig. 4 is the scheme schematic diagram for increasing the brain PET of top droop detector；
Fig. 5 is the schematic diagram that the helmet adds chin detector piece；
Fig. 6 is each 1/4 spherical detector schematic diagram before and after the hemisphere lower half portion of the upper half；
Fig. 7 is the spherical detector schematic diagram in upper half hemisphere lower half portion or so each 1/4；
Fig. 8 is the detector schematic diagram that each 1/3 spheroid shape is combined into an entire ellipsoid；
Fig. 9 is the detector schematic diagram of two 1/4 balls of latter half hemisphere first half；
Figure 10 is the structural schematic diagram of PET detection module.
Appended drawing reference corresponding intrument is 1, detector；2, head, 3, detection cavity, 4, opening, 5, top, 6, body portion, 7,
PET detects module, 8, photosensor arrays, 9, light guide, 10, PET crystal detection, the 11, first explorer portion, 12, second
Explorer portion, 13 third explorer portions.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Embodiment 1
A kind of three parts fission full angle meets brain pet detector, it is characterised in that: detects mould comprising a plurality of PET
Part, each PET detection module are made of PET crystal detection and photosensor arrays and light guide, and PET crystal detection is to spy
Survey the intracavitary direction arrangement of chamber；The detection cavity with an opening, the detection cavity are formed by a plurality of PET detection modules are adjacent
No more than 35-50cm, the opening of the detection cavity is located at below detection cavity the length, width and height of inner cavity；The opening sectional area is greater than people
The maximum secting area of neck in the horizontal direction；A plurality of PET detection modules are divided into three groups, and first group of PET detects module
The first detection cavity segment is formed, second group of PET detection module forms the second detection cavity segment, and third group PET detection module is formed
Third detects cavity segment, the first detection cavity segment and the second detection cavity segment and third detection cavity segment three parts patch
Foregoing detection chamber is formed after conjunction；First group of PET detection module is non-removably connected at together；Second group of PET detects module
It is non-removably connected at together；Third group PET detection module is non-removably connected at together；First detection cavity
Part is by the first support member support；Second probe portion is by the second support member support；The third probe portion by
Third support member support.The detector can make the suitable detection mould cover for not influencing radiation, such as engineering plastics, transparent
Or semi-transparent resin is made, and is designed to match with aforementioned first group of module and second group of module, third group module three
All detection modules are then inwardly inserted into three parts detection suitable for the installation of aforementioned complex PET detection module by part mould cover
Correspondence predeterminated position on mould cover, detector are the type that accomplishes, and are assembled on the spot simple and convenient.
The first substitution detection cavity is formed after the first detection cavity segment and the second detection cavity segment two parts fitting；
The second substitution detection cavity is formed after the first detection cavity segment and third detection cavity segment two parts fitting；This first is replaced
Such degree is reached to the detection coverage for really meeting event for detection cavity or the second substitution detection cavity, from the detection
What chamber center occurred really meets event, and at least 65-70% is visited by aforementioned first substitution detection cavity or the second substitution detection cavity
It measures.This embodiment can satisfy a variety of actual needs, such as special occasions, as patient has big beard or long hair can not
It rejects, head shape is more strange, and there is metal object on the crown, radiates the injury constituted through metallic reflection in order to prevent, this is to can it
It is detected with two detection cavity segments, for the consideration of measured's health.
The first detection cavity segment and the second detection cavity segment and third detection cavity segment can be respectively first
Any angle is rotated under the support of supporting member and the second supporting member and third supporting member or is translated to any direction；Packet
It, should including including the gap that the first detection cavity segment and the second detection cavity segment and third detection cavity segment are bonded two-by-two
All free cross-sections product of detection cavity is respectively less than the 1/2-1/3 of minimum one area in aforementioned PET crystal detection；Detection cavity
Such degree is reached to the detection coverage for really meeting event, what is occurred from the detection cavity center really meets event, until
Few 80-85% is detected by aforementioned complex PET detection module；The PET crystal detection of the joint place of first probe portion
Edge formed contour line and second probe portion joint place PET crystal detection edge formed contour line and
The contour line that the edge of the PET crystal detection of the joint place of the third probe portion is formed, is respectively positioned on some single plane
It is interior or in some single curved surface or be located in one or more planes or one or more curved surface.E.g.
80%, 82%, 84% ratio.Such design ensure that the catch rate for really meeting event, and the comparison prior art is generally only
Head top package is tighter, but captures principle, the catch rate of LOR also at most 50% or so according to PET.
The contour line is located in some single plane；The shape of the detection cavity is spherical, ellipsoid；The ball
The axis of shape, in particular to all PET detection module passes through the centre of sphere, and the inner surface of all PET detection module is to the centre of sphere
It is equidistant；The ellipsoid, in particular to the detection cavity inner cavity form the ellipsoid of c > a=b.Here due to being directed to head
Portion's detection application, the ellipsoid of c > a=b are more suitable for that the ellipsoid of a > c=b and the ellipsoid of b > a=c are also that can answer
, but due to the stock size situation on head, it is little that both apply practical significance.Both configuration significant discomforts are used
In the size characteristic of the general longer head part of c-axis orientation ratio.
The detection cavity is spliced by the part of two different geometries in top and body portion on the whole；The body portion
Shape be following shape one of which: a part of shape in spherical centre or the elliposoidal of c > a=b removal top and
The shape of each a part in bottom, or positive polygon prism shape or it is cylindric or up big and down small it is round table-like or upper it is small under
Big round table-like or up big and down small positive multi-prism taper or up-small and down-big positive multi-prism taper；The top is planar
The inner cavity at end cap top is a part of spherical surface or the inner cavity at top is the ellipsoid that a:b:c is arbitrary proportion
A part；The maximum continuous gap formed between the top and body portion is again smaller than minimum one in aforementioned PET crystal detection
The 1/2-1/3 of a area.The detection cavity, which has to can guarantee, can contain head size object, but in most cases, such as
The pure spherical or spheroid shape of fruit, then top is more empty in fact, is unfavorable for save the cost, and the cost for detecting module after all is not low,
So body portion of different shapes and more gentle top are combined, while realizing detection effect also effectively
Cost is saved.
Coincident circuit is all connected between every two PET detection module；The specific configuration of each PET detection module
For, be disposed with probe body, photosensor arrays, light guide, PET crystal detection from outside to inside, light guide both with photoelectricity
Sensor array close-coupled, also with PET crystal detection close-coupled；The PET crystal detection material is scintillation crystal, the sudden strain of a muscle
Bright crystal is made of 1 or 1 or more crystal block；The positive polygon prism is regular hexagonal prism or positive eight prism, described just more
Pyramid is positive rectangular pyramid or positive hexagonal pyramid；It is close to the barricade that the body subordinate edge is attached with circular ring type, the material of the barricade
Matter is stainless steel or boron-containing plastic or leaded plastic, and the barricade matches the segmentation form in fit portion, by several pieces of scoreboards
Be spliced an entire annulus.The barricade is identical by shape or symmetrical 2-5 block scoreboard is spliced.Here
Barricade is also present invention original creation place, and the Radiation On Human body of PET also has a significant effect, is necessary to be on one's guard, due to organization of human body
Problem must leave a blank at neck, then the annulus barricade of above-mentioned similar cangue type, can reduce PET to human body to the maximum extent
Partial radiation effect, but also it is easy to disassemble, which, which can be equipped with, is suitable for matching with the lower edge of the detection mould cover
The buckle of conjunction, easy to disassemble, which for example can be symmetrical two pieces, be pacified after head enters detection cavity
Dress.When detection cavity is divided into the symmetrical or asymmetric three parts of left and right, the scoreboard of the two pieces of barricades in left and right can be directly right
It answers and cooperates in size therewith.Aforementioned several pieces of scoreboards can be three pieces of scoreboards, corresponds to first, second, third group of PET and detects mould
The decomposition texture of part is simultaneously respectively attached to below first, second, third group of PET detection module.
The front of the detection cavity several PET detection module on the upper side is removed, and is formed one and is observed outward suitable for eyes
Opening；Here the opening for being suitable for eyes and observing outward, either designing detection module in periphery in detection cavity design
Size and position, preset at the very start, can also whole detection cavity the arrangement of detection module and detection mould cover all design
Afterwards, remove part detection module or replace it with the smaller detection module of area.Detection cavity is divided into three in eyes part or so
Part is two-part, and the design of the detection module and detection mould cover of the opening is also adaptively adjusted.
The inside face of the PET crystal detection is plane or almost plane, and shape is square or rectangle；It is described
Crystal block, the crystal strip array being specifically made of a plurality of crystal items or by the crystal of 1 or 1 or more integral cutting
Composition；The material of the scintillation crystal is selected from bismuth germanium oxide (BGO) crystal, sodium iodide (NaI) crystal, NaI (Tl) monocrystalline crystal, silicon
The one or more of them of sour lutetium (LSO) crystal, gadolinium siliate (GSO) crystal, yttrium luetcium silicate (LYSO)；In each detection module ring
Between be installed between partition made of high z number material or part detection module ring and be installed with high z number material
Partition is not installed between manufactured partition or all detection module rings；The high z number material is lead or tungsten；It is described
Positive polygon prism is regular hexagonal prism or positive eight prism, and the regular polygon is regular hexagon or octagon.Above-mentioned crystal is not poor
It lifts, present invention innovation is not intended to material itself, and all existing future some crystal may be used to this Shen
Please.
The crystal strip array is made of a plurality of crystal items；Described 1 or 1 or more crystal block, each is brilliant
Body block is made of the crystal of 1 or 1 or more integral cutting.
Also there is the first power supply circuit and the second power supply circuit and third power supply circuit, the first communication line and the second communication
Route and third communication line, a PC terminal；Have PET signal acquisition and operational analysis system in the PC terminal；First confession
Circuit provides the electric energy under voltage rating to first supporting member and first group of PET detection module, second power supply
Circuit provides the electric energy under voltage rating, third power supply electricity to second supporting member and second group of PET detection module
Road provides the electric energy under voltage rating to the third supporting member and third group PET detection module；First communication line
Detection signal is received from first group of PET detection module, which receives detection letter from second group of PET detection module
Number, which receives detectable signal from third group PET detection module, the first communication line and the second communication line and
The signal that third communication line receives sends aforementioned PET signal acquisition and operational analysis system to.Above-mentioned first and second,
Third supporting member is more flexibly arranged, but also the flexible rotating configuration in actually detected, which adapts to detection demand utilization, to be become
It may.
Embodiment 2
As shown in fig. 6, in the detector shape of the present embodiment, form spherical overall structure, can pullover, it is spherical it is horizontal therefrom
Between cut two parts, be divided into second, third before and after top half first, lower half portion, only expose opening for horizontal resection just below
Mouthful, it is of course possible to horizontal resection need not be imposed, opening module can be uneven.The advantages of this mechanism, has, and design is simple, detection
Module can detect the also very good design of mould cover with a size just, and various angles are just as or similar, only lower part are needed to reserve
Opening, three parts stitching portion can be uneven, it is not necessary to which sliced crystal is specific shape by force, as long as being combined into whole without macropore
Gap.Due to the mechanism of this fission, the lower part for which size that can first have a try can be inserted in head, then take on suitable
Portion is cooperated, there is no unconformable problem is cooperated, after disadvantage is that head part enters laterally, since head part's majority is
Longer up and down, for transverse cross-sectional diameter without so big, some wastes are arranged in the module in transverse direction, do not need so big sky
Between.If there is long hair on the head adapted to or has big beard or chin to have metal insert, one can be only stayed with lower part
Half detection module group, can also reach 65% or more LOR catch rate, use enough.
Embodiment 3
As shown in fig. 7, in the detector shape of the present embodiment, form spherical overall structure, can pullover, it is spherical, it is horizontal from
Cut two parts in centre.Top half first, lower half portion or so are divided into second, third, only expose horizontal resection just below
Opening, it is of course possible to horizontal resection need not be imposed, opening module can be uneven.The advantages of this mechanism, has, and design is simple, visits
The also very good design of mould cover can be detected with a size just by surveying module, and various angles are just as or similar, only lower part are needed to stay
It is open out, three parts stitching portion can be uneven, it is not necessary to which sliced crystal is specific shape by force, as long as being combined into whole not big
Hole.Due to the mechanism of this fission, the lower part for which size that can first have a try can be inserted in head, then take suitably
Top is cooperated, there is no unconformable problem is cooperated, after disadvantage is that head part enters laterally, due to head part's majority
Be it is longer up and down, for transverse cross-sectional diameter without so big, some wastes are arranged in the module in transverse direction, do not need so big sky
Between.There is metal object for head lower part side, such as there are golden tooth, the embedding support object of side chin metal in side, can take away lower part
After the detection module group of side, still can by 65% or more LOR catch rate, sensitivity is higher.
Embodiment 4
As shown in figure 8, in the detector shape of the present embodiment, form spherical overall structure, can pullover, spheroid shape c > a=
B is divided into three parts every 120 ° from the vertical paper in the midpoint of two focuses, only exposes the opening of horizontal resection just below, certainly
Horizontal resection may not necessarily be imposed, opening module can be uneven.The advantages of this mechanism, has, and design is simple, and detection module can
Just with 2-3 size, the also very good design of mould cover is detected, various angles are just as or similar, it is only necessary to rectangle, strip
It is shape, three kinds trapezoidal, only need lower part to reserve opening, three parts stitching portion can be uneven, it is not necessary to which sliced crystal is by force
Specific shape, as long as being combined into whole without macrovoid.Due to the mechanism of this fission, which size can first have a try
Lower part can be inserted in head, then suitable top is taken to be cooperated, and there is no unconformable problem is cooperated, disadvantage is the number of people
Portion enter after, due to head part's majority be it is longer up and down, some wastes are arranged in the module on especially top on longitudinal direction, do not need
So big space.There is metal object for head lower part side, such as there are golden tooth, the embedding support object of side chin metal in side, it can be with
After taking away the detection module group of lower part side, still can by 65% or more LOR catch rate, sensitivity is higher.This structure
Type is specially adapted to dolicocephaly.
Embodiment 5
As shown in figure 9, in the detector shape of the present embodiment, form spherical overall structure, can pullover, be divided into front and back two
Point, rear portion is divided into first, preceding part or so and is divided into second, third, only exposes the opening of horizontal resection just below, it is of course possible to no
Horizontal resection must be imposed, opening module can be uneven.The advantages of this mechanism, has, and design is simple, and detection module can be with 4-5
Size just, detects the also very good design of mould cover, and various angles are just as or similar, it is only necessary to which top is by rectangle, fan-shaped group
At, body portion by rectangle, it is trapezoidal form, only need lower part to reserve opening, three parts stitching portion can be uneven, it is not necessary to cut by force
Crystal is specific shape, as long as being combined into whole without macrovoid.Compared to embodiment 4, more saving crystal.And this structure
Type is very suitable for use when tested person in need observation, and if tested person needs to cooperate instruction, tested person has claustrophobia
Situations such as.
The diversified forms cooperation at body portion and top can be used in the application in shape configuration, as described in example 1 above, without
It arrests in the description of embodiment 2-5, can not be exhaustive herein because this mode is very more, but it is practiced without difficulty here, all
It is the protection scope of the application.Supporting member is not drawn into figs. 6-9, but art technology is enough to match according to preceding description
It is standby, do not implement on technology barrier.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, of the invention
Protection scope should be determined by the scope of protection defined in the claims.
Claims (10)
1. a kind of three parts fission full angle meets brain pet detector, it is characterised in that:
Module is detected comprising a plurality of PET, each PET detection module is by PET crystal detection and photosensor arrays and light
Composition is led, PET crystal detection is arranged to the intracavitary direction of detection cavity；
The detection cavity with an opening is formed by a plurality of PET detection modules are adjacent, the length, width and height of the detection cavity inner cavity are equal
No more than 35-50cm, the opening of the detection cavity is located at below detection cavity；The opening sectional area is greater than person neck in the horizontal direction
On maximum secting area；
The a plurality of PET detection module is divided into three groups, and first group of PET detection module forms the first detection cavity segment, and second group
PET detects module and forms the second detection cavity segment, and third group PET detects module formation third and detects cavity segment, and described first visits
Foregoing detection chamber is formed after surveying cavity segment and the second detection cavity segment and third detection cavity segment three parts fitting；First group
PET detection module is non-removably connected at together；Second group of PET detection module is non-removably connected at together；The
Three groups of PET detection modules are non-removably connected at together；
The first detection cavity segment is by the first support member support；Second probe portion is by the second support member support；
The third probe portion is by third support member support.
2. three parts fission full angle as described in claim 1 meets brain pet detector, it is characterised in that:
The first substitution detection cavity is formed after the first detection cavity segment and the second detection cavity segment two parts fitting；It is described
The second substitution detection cavity is formed after first detection cavity segment and third detection cavity segment two parts fitting；
The first substitution detection cavity or the second substitution detection cavity reach such to the detection coverage for really meeting event
Degree, what is occurred from the detection cavity center really meets event, and at least 65-70% is by aforementioned first substitution detection cavity or second
Substitution detection cavity detects.
3. three parts fission full angle as described in claim 1 meets brain pet detector, it is characterised in that:
The first detection cavity segment and the second detection cavity segment and third detection cavity segment can be respectively in the first supports
Any angle is rotated under the support of component and the second supporting member and third supporting member or is translated to any direction；
The gap being bonded two-by-two including the first detection cavity segment and the second detection cavity segment and third detection cavity segment
Inside, all free cross-sections product of the detection cavity is respectively less than the 1/2-1/3 of minimum one area in aforementioned PET crystal detection；
Detection cavity reaches such degree to the detection coverage for really meeting event, occurs from the detection cavity center true
Meet event, at least 80-85% is detected by aforementioned complex PET detection module；
The contour line and second probe portion that the edge of the PET crystal detection of the joint place of first probe portion is formed
Joint place PET crystal detection the PET of the joint place of contour line and the third probe portion that is formed of edge detect it is brilliant
The contour line that the edge of body is formed is respectively positioned in some single plane or in some single curved surface or is located at
In one or more planes or one or more curved surfaces.
4. three parts fission full angle as claimed in claim 3 meets brain pet detector, it is characterised in that:
The contour line is located in some single plane；
The shape of the detection cavity is spherical, ellipsoid；
The axis of described spherical, in particular to all PET detection modules passes through the centre of sphere, and the interior table of all PET detection module
Face is equidistant to the centre of sphere；
The ellipsoid, in particular to the detection cavity inner cavity form the ellipsoid of c > a=b.
5. three parts fission full angle as claimed in claim 4 meets brain pet detector, it is characterised in that:
The detection cavity is spliced by the part of two different geometries in top and body portion on the whole；
The shape in the body portion is the one of which of following shape: the ellipsoid of a part of shape in spherical centre or c > a=b
The shape of each a part in shape removal top and bottom, or positive polygon prism shape or cylindric or up big and down small rotary table
Shape or up-small and down-big round table-like or up big and down small positive multi-prism taper or up-small and down-big positive multi-prism taper；
The top is that the inner cavity at planar end cap top is a part of spherical surface or the inner cavity at top is a:
B:c is a part of the ellipsoid of arbitrary proportion；
The maximum continuous gap formed between the top and body portion is again smaller than one face minimum in aforementioned PET crystal detection
Long-pending 1/2-1/3.
6. the three parts fission full angle as described in one of claim 5 or 4 meets brain pet detector, feature exists
In:
Coincident circuit is all connected between every two PET detection module；
Being particularly configured to for each PET detection module, is disposed with probe body, photoelectric sensor battle array from outside to inside
Column, light guide, PET crystal detection, light guide both with photosensor arrays close-coupled, also with PET crystal detection close-coupled；
The PET crystal detection material is scintillation crystal, which is made of 1 or 1 or more crystal block；
The positive polygon prism is regular hexagonal prism or positive eight prism, and the positive polygonal pyramid is positive rectangular pyramid or positive hexagonal pyramid；
It is close to the barricade that the body subordinate edge is attached with circular ring type, the material of the barricade is stainless steel or boron-containing plastic
Or leaded plastic, the barricade match the segmentation form in fit portion, are spliced an entire annulus by several pieces of scoreboards.
7. three parts fission full angle as claimed in claim 6 meets brain pet detector, it is characterised in that:
The front of the detection cavity several PET detection module on the upper side is removed, and is formed one and is opened suitable for what eyes were observed outward
Mouthful；
Aforementioned several pieces of scoreboards can be three pieces of scoreboards, the decomposition texture corresponding to first, second, third group of PET detection module
And it is respectively attached to below first, second, third group of PET detection module.
8. three parts fission full angle as claimed in claim 7 meets brain pet detector, it is characterised in that:
The inside face of the PET crystal detection is plane or almost plane, and shape is square or rectangle；
The crystal block, the crystal strip array being specifically made of a plurality of crystal items or is integrally cut by 1 or 1 or more
The crystal composition cut；
The material of the scintillation crystal is selected from bismuth germanium oxide (BGO) crystal, sodium iodide (NaI) crystal, NaI (Tl) monocrystalline crystal, silicon
The one or more of them of sour lutetium (LSO) crystal, gadolinium siliate (GSO) crystal, yttrium luetcium silicate (LYSO)；
It is installed between partition made of high z number material or part detection module ring between each detection module ring
It is installed between partition made of high z number material or all detection module rings and does not install partition；
The high z number material is lead or tungsten；The positive polygon prism is regular hexagonal prism or positive eight prism, the regular polygon
It is regular hexagon or octagon.
9. three parts fission full angle as claimed in claim 8 meets brain pet detector, it is characterised in that:
The crystal strip array is made of a plurality of crystal items；Described 1 or 1 or more crystal block, each crystal block
It is made of the crystal of 1 or 1 or more integral cutting.
10. a kind of three parts fission full angle meets PET detecting devices comprising as described in any one of claims 1-9
Three parts fission full angle meets brain pet detector, it is characterised in that:
Also there is the first power supply circuit and the second power supply circuit and third power supply circuit, the first communication line and the second communication line
With third communication line, a PC terminal；
Have PET signal acquisition and operational analysis system in the PC terminal；
First power supply circuit provides the electricity under voltage rating to first supporting member and first group of PET detection module
Can, which provides the electric energy under voltage rating to second supporting member and second group of PET detection module,
The third power supply circuit provides the electric energy under voltage rating to the third supporting member and third group PET detection module；
First communication line receives detection signal from first group of PET detection module, which visits from second group of PET
It surveys module and receives detectable signal, which receives detectable signal, the first communication line from third group PET detection module
Aforementioned PET signal acquisition and operational analysis system are sent to the signal that the second communication line and third communication line receive
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785002.4A CN109864751B (en) | 2018-07-17 | 2018-07-17 | Three-part split full-angle coincidence brain PET detector and whole equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785002.4A CN109864751B (en) | 2018-07-17 | 2018-07-17 | Three-part split full-angle coincidence brain PET detector and whole equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109864751A true CN109864751A (en) | 2019-06-11 |
| CN109864751B CN109864751B (en) | 2021-07-02 |
Family
ID=66916867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810785002.4A Active CN109864751B (en) | 2018-07-17 | 2018-07-17 | Three-part split full-angle coincidence brain PET detector and whole equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109864751B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109846503A (en) * | 2018-05-07 | 2019-06-07 | 山东麦德盈华科技有限公司 | A kind of full angle meets PET detection method |
| CN114081522A (en) * | 2022-01-21 | 2022-02-25 | 苏州瑞派宁科技有限公司 | PET imaging assembly, imaging device and detection method |
| WO2022078928A1 (en) | 2020-10-13 | 2022-04-21 | Positrigo Ag | Positron emission tomography (pet)-scanning device |
| EP4159133A1 (en) | 2021-10-01 | 2023-04-05 | Positrigo AG | Positron emission tomography (pet)-scanning device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543463A (en) * | 2013-10-23 | 2014-01-29 | 许剑锋 | Detector applied to emitting and imaging device and emitting and imaging device |
| CN103536308A (en) * | 2013-10-23 | 2014-01-29 | 许剑锋 | Launching and imaging device |
| US20150115162A1 (en) * | 2013-10-30 | 2015-04-30 | National Institute Of Radiological Sciences | Helmet-type pet device |
| US20160166219A1 (en) * | 2014-12-15 | 2016-06-16 | West Virginia University | ViRPET - COMBINATION OF VIRTUAL REALITY AND PET BRAIN IMAGING |
| WO2017186993A1 (en) * | 2016-04-25 | 2017-11-02 | General Equipment For Medical Imaging, S.A. | Pet imaging device for observing the brain |
| CN107595316A (en) * | 2017-10-30 | 2018-01-19 | 山东麦德盈华科技有限公司 | A kind of head PET device and imaging method for fast imaging |
-
2018
- 2018-07-17 CN CN201810785002.4A patent/CN109864751B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543463A (en) * | 2013-10-23 | 2014-01-29 | 许剑锋 | Detector applied to emitting and imaging device and emitting and imaging device |
| CN103536308A (en) * | 2013-10-23 | 2014-01-29 | 许剑锋 | Launching and imaging device |
| US20150115162A1 (en) * | 2013-10-30 | 2015-04-30 | National Institute Of Radiological Sciences | Helmet-type pet device |
| US20160166219A1 (en) * | 2014-12-15 | 2016-06-16 | West Virginia University | ViRPET - COMBINATION OF VIRTUAL REALITY AND PET BRAIN IMAGING |
| WO2017186993A1 (en) * | 2016-04-25 | 2017-11-02 | General Equipment For Medical Imaging, S.A. | Pet imaging device for observing the brain |
| CN107595316A (en) * | 2017-10-30 | 2018-01-19 | 山东麦德盈华科技有限公司 | A kind of head PET device and imaging method for fast imaging |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109846503A (en) * | 2018-05-07 | 2019-06-07 | 山东麦德盈华科技有限公司 | A kind of full angle meets PET detection method |
| CN109846503B (en) * | 2018-05-07 | 2021-06-01 | 山东麦德盈华科技有限公司 | Full-angle coincidence PET detection method |
| WO2022078928A1 (en) | 2020-10-13 | 2022-04-21 | Positrigo Ag | Positron emission tomography (pet)-scanning device |
| EP4159133A1 (en) | 2021-10-01 | 2023-04-05 | Positrigo AG | Positron emission tomography (pet)-scanning device |
| WO2023052247A1 (en) | 2021-10-01 | 2023-04-06 | Positrigo Ag | Positron emission tomography (pet)-scanning device |
| CN114081522A (en) * | 2022-01-21 | 2022-02-25 | 苏州瑞派宁科技有限公司 | PET imaging assembly, imaging device and detection method |
| CN114081522B (en) * | 2022-01-21 | 2022-08-02 | 苏州瑞派宁科技有限公司 | PET imaging assembly, imaging device and detection method |
| WO2023138196A1 (en) * | 2022-01-21 | 2023-07-27 | 苏州瑞派宁科技有限公司 | Pet imaging assembly, imaging apparatus, and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109864751B (en) | 2021-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109864751A (en) | A kind of three parts fission full angle meets brain pet detector and integral device | |
| CN109864752A (en) | It is a kind of entirety full angle meet brain pet detector and integral device | |
| US10716520B2 (en) | PET imaging device for observing the brain | |
| JP6124216B2 (en) | Helmet type PET equipment | |
| US9372267B2 (en) | Apparatus and methods for photosensor quadrant sharing | |
| US6288399B1 (en) | Depth of interaction detector block for high resolution positron emission tomography | |
| US7989771B2 (en) | Pinhole SPECT camera with plural detector heads | |
| CN109846505A (en) | A kind of two parts fission full angle meets brain pet detector and integral device | |
| US8063377B2 (en) | Crystal identification for high resolution nuclear imaging | |
| KR101542836B1 (en) | Detector for Positron Emission Tomography and Positron Emission Tomography system using the same | |
| CN106562799A (en) | Detector for positron emission imaging equipment, and positron emission imaging equipment | |
| CN205826876U (en) | Positron emission tomography | |
| CA3124832C (en) | Prismatoid light guide | |
| US7408163B2 (en) | Methods and systems for medical imaging | |
| US11147523B2 (en) | PET imaging device for observing the brain | |
| CN109846504B (en) | Full-angle PET (positron emission tomography) detector | |
| Tashima et al. | A proposed helmet-PET with a jaw detector enabling high-sensitivity brain imaging | |
| JP7144916B2 (en) | Combined whole body PET and CT detector, and apparatus and method thereof | |
| CN105232074B (en) | Toy SPECT equipment | |
| Rajeswaran et al. | Dynamic monitoring of [11C] diprenorphine in rat brain using a prototype positron imaging device | |
| Sossi et al. | NEMA NU 2-2000+ performance measurements on an ADAC MCD camera | |
| Tornai et al. | Phantom Evaluation of a Multi-Pinhole Cardiac SPECT Camera for 3D Molecular Breast Imaging | |
| Akamatsu et al. | Basic performance evaluation of a helmet-type PET prototype with four-layer DOI detectors | |
| Akamatsu et al. | New brain phantoms suitable for brain scanners with hemisphere detector arrangement | |
| JPH04329302A (en) | Head part external shape detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |