CN204269846U - A kind of double source safety check CT scan system - Google Patents
A kind of double source safety check CT scan system Download PDFInfo
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- CN204269846U CN204269846U CN201420827295.5U CN201420827295U CN204269846U CN 204269846 U CN204269846 U CN 204269846U CN 201420827295 U CN201420827295 U CN 201420827295U CN 204269846 U CN204269846 U CN 204269846U
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Abstract
The utility model provides a kind of double source safety check CT scan system, described system comprises: two cover scanning imaging systems, often overlap scanning imaging system and all there is separately independently radiographic source and detector, described two cover scanning imaging systems are positioned on same set of rotating mechanism side by side, and the imaging plane of described two cover scanning imaging systems has predetermined interval.The utility model can guarantee that two cover imaging optical paths do not interfere with each other, the mutual interference problem of scattering between the double source that effectively prevent double source CT scanning system in prior art by the two cover imaging systems arranged respectively.
Description
Technical field
The utility model relates to technical field of radiation detection, particularly relates to a kind of double source safety check CT scan system.
Background technology
Safety check CT scan system of the prior art is generally a rotating mechanism and installs a set of radiographic source imaging system, and its radiographic source only has a kind of energy.When needs carry out dual energy scan to detected object, the high low energy detector of general employing forms pseudo-dual intensity image.And for being mainly used in medical heart scanning, solve the dual-source scanning system of heartbeat imaging problem, because double source is positioned at same scanning plane, be difficult to solve the mutual interference problem of scattering between double source.For scattering interference problem, can be solved by optimized algorithm in prior art, but optimized algorithm can only improve scattering interference, can not thoroughly deal with problems.And solved the method for scattering interference problem by collimating apparatus, then reduce light source subtended angle utilization factor because collimating apparatus needs the half of light source to be blocked to reduce its scattering interference, sacrifice the energy of light source half.
Utility model content
The utility model provides a kind of double source safety check CT scan system, to solve the mutual interference problem of scattering in prior art between double source.
For solving the problems of the technologies described above, the utility model provides a kind of double source safety check CT scan system, and it comprises:
A kind of double source safety check CT scan system, it comprises:
Two cover scanning imaging systems, often overlap scanning imaging system and all have separately independently radiographic source and detector, and described two cover scanning imaging systems are positioned on same set of rotating mechanism side by side, and the imaging plane of described two cover scanning imaging systems has predetermined interval.
Further,
Two radiographic sources of described two cover scanning imaging systems become predetermined angle to arrange on described rotating mechanism.
Further,
Two radiographic sources of described two cover scanning imaging systems become 180 ° of settings on described rotating mechanism.
Further,
Two radiographic sources of described two cover scanning imaging systems are set to 90 degrees on described rotating mechanism.
Further, described system is used for:
Scan-data based on described two cover scanning imaging systems is rebuild and is obtained CT image.
Further,
Workload in described scanning imaging system can carry out high low energy switching.
Further, described system is used for:
Utilize the high energy of described two cover scanning imaging systems and low energy gamma source to obtain high energy scan-data and the low energy scan-data of same section respectively, rebuild the dual intensity CT image obtaining same section.
Further,
In described double source safety check CT scan system, the pace of travelling belt is identical with the sweep velocity of often overlapping scanning imaging system.
Further, described system is used for:
The scan-data of described two cover scanning systems is utilized to rebuild the monoenergetic CT image of acquisition two width or several different sections.
Further,
The scan-data of described two cover scanning systems is complementary, and the complete CT image of acquisition one is rebuild in the described scan-data combination based on complementation.
Further,
In described double source safety check CT scan system, the pace of travelling belt is 2 times of the sweep velocity of often overlapping scanning imaging system.
Visible, in double source safety check CT scan system provided by the utility model, can guarantee that two cover imaging optical paths do not interfere with each other, the mutual interference problem of scattering between the double source that effectively prevent double source CT scanning system in prior art by the two cover imaging systems arranged respectively.Formation method of the present utility model is flexible, when rotational speed remains unchanged, sweep velocity can be promoted one times, and the percent of pass efficiently solving detected object in prior art improves the technical matters being limited to bearing rotating speed.In addition, two cover imaging systems in the utility model can also adopt different energy imagings respectively, thus can obtain real dual intensity image, and its Object Classification ability has had qualitative leap.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the double source safety check CT scan system of the utility model embodiment;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is the scanning area schematic diagram of two cover scanning imaging systems in the double source safety check CT scan system of the utility model embodiment.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of 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 creative work prerequisite, all belong to the scope of the utility model protection.
First the utility model embodiment provides a kind of double source safety check CT scan system, and see Fig. 1-Fig. 3, it comprises:
Two cover scanning imaging systems 6 and 7, often overlap scanning imaging system and all there is separately independently radiographic source (6-1,7-1) with detector (6-2,7-2), described two cover scanning imaging systems 6 and 7 are positioned on same set of rotating mechanism 2 side by side, and the imaging plane of described two cover scanning imaging systems has predetermined interval.
In Fig. 1,1 is base, and 2 is slip ring (i.e. rotating mechanism), and 3 is slip ring electric rotating machine, and 4 is travelling belt, and 5 is slip ring supplemental support, and 6 is the first scanning imaging system, and 7 is the second scanning imaging system, and 8 is scan channel.
Wherein, slip ring supplemental support 5 can selectivity be installed.Slip ring electric rotating machine 3 can drive the first scanning imaging system 6 and the second imaging system 7 to rotate around travelling belt 4 simultaneously.
Fig. 2 is the A-A diagrammatic cross-section of Fig. 1, and Fig. 3 is the B-B diagrammatic cross-section of Fig. 1.Wherein, the first scanning imaging system 6 is included in radiographic source 6-1 and detector 6-2 that slip ring 2 is oppositely arranged, and the second scanning imaging system 7 is included in radiographic source 7-1 and detector 7-2 that slip ring 2 is oppositely arranged.Preferably, two radiographic sources (6-1,7-1) of two cover scanning imaging systems 6 and 7 can become predetermined angle to arrange on slip ring 2.The two can become 180 °, also can be in 90 °, and the counterweight and the transient equilibrium that are beneficial to system regulate.Wherein, two radiographic sources (6-1,7-1) become 180 ° of transient equilibrium being conducive to system the most to regulate.
First scanning imaging system 6 and the second scanning imaging system 7 need to keep certain distance in a scanning direction, and distance is therebetween minimum is the width of a detector.When the two distance interval is larger, larger scanning area can be covered, thus effectively improve sweep velocity.Alternatively, the two can lay respectively at the both sides of same slip ring 2.
Alternatively, according to different demands during practical application, can rebuild based on the scan-data of described two cover scanning imaging systems and obtain CT image, wherein, the double source safety check CT scan system of the utility model embodiment can have two kinds of scan modes:
When in actual applications, when requiring high to sweep velocity, the scanning area of two cover scanning imaging systems 6 and 7 can non-overlapping copies side by side in a scanning direction, arranges at interval.Namely in schematic diagram as shown in Figure 4, along on the direction of scanning of the direction of arrow, the first scanning imaging system 6 and the second scanning imaging system 7 scan the a-quadrant on travelling belt 4 and B region respectively.Now arrange the energy coincidence of two radiographic sources (6-1,7-1), two cover scanning imaging systems 6 and 7 can rebuild the monoenergetic image of acquisition two width or several different sections.Wherein, when the scan-data of two cover scanning systems is complementary, the two cover scan-datas obtained can common combination be one group of complete scan-data.In now double source safety check CT scan system, the pace of travelling belt can be 2 times of the sweep velocity of often overlapping scanning imaging system.When the rotational speed of slip ring 2 remains unchanged, greatly can improve sweep velocity, sweep velocity doubled like this.
And when requiring high to Object Classification, the energy of two radiographic sources (6-1,7-1) of two cover scanning imaging systems 6 and 7 can be made can to carry out high low energy switching.Now the scanning area of two cover scanning imaging systems 6 and 7 can be overlapping in a scanning direction, namely often overlaps scanning system and all scan the whole scanning areas on travelling belt 4.The energy of two radiographic sources (6-1,7-1) is set to high energy and low energy respectively, then two obtained cover scan-datas are respectively high energy scan-data and the low energy scan-data of same section.True dual energy scan data can be obtained after high energy scan-data and low energy scan-data being superposed by algorithm, to be different from existing pseudo-dual energy scan (high energy namely collected respectively when radioactive source energy is constant and low energy data), to utilize true dual intensity data to carry out dual intensity CT and rebuild and more effectively can carry out Object Classification.In this case, in double source safety check CT scan system, the pace of travelling belt is identical with the sweep velocity of often overlapping scanning imaging system.
Also namely, by regulating the relation between travelling belt and the sweep velocity of scanning imaging system, different imaging modes can be adjusted.As: when slip ring rotates 1 circle, when the forward travel distance of travelling belt is at or about detector along channel direction width (namely slip ring turns the sweep velocity of 1 circle), the way that two plane of scanning motion independent scan at this time can be adopted also independently to rebuild carries out the imaging respectively of high low energy; When slip ring rotates 1 circle, when travelling belt forward travel distance approximates detector along 2 times of channel direction width or more, two of single energy scan plane data splicings can be adopted to merge the way imaging of then rebuilding.
Visible, in the double source safety check CT scan system provided in the utility model embodiment and scan method, can guarantee that two cover imaging optical paths do not interfere with each other, the mutual interference problem of scattering between the double source that effectively prevent double source CT scanning system in prior art by the two cover imaging systems arranged respectively.The formation method of the utility model embodiment is flexible, when rotational speed remains unchanged, sweep velocity can be promoted one times, and the percent of pass efficiently solving detected object in prior art improves the technical matters being limited to bearing rotating speed.In addition, two cover imaging systems in the utility model embodiment can also adopt different energy imagings respectively, thus can obtain real dual intensity image, and its Object Classification ability has had qualitative leap.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (11)
1. a double source safety check CT scan system, it is characterized in that, it comprises:
Two cover scanning imaging systems, often overlap scanning imaging system and all have separately independently radiographic source and detector, and described two cover scanning imaging systems are positioned on same set of rotating mechanism side by side, and the imaging plane of described two cover scanning imaging systems has predetermined interval.
2. double source safety check CT scan system according to claim 1, is characterized in that:
Two radiographic sources of described two cover scanning imaging systems become predetermined angle to arrange on described rotating mechanism.
3. double source safety check CT scan system according to claim 2, is characterized in that:
Two radiographic sources of described two cover scanning imaging systems become 180 ° of settings on described rotating mechanism.
4. double source safety check CT scan system according to claim 2, is characterized in that:
Two radiographic sources of described two cover scanning imaging systems are set to 90 degrees on described rotating mechanism.
5. double source safety check CT scan system according to any one of claim 1 to 4, it is characterized in that, described system is used for:
Scan-data based on described two cover scanning imaging systems is rebuild and is obtained CT image.
6. double source safety check CT scan system according to claim 5, is characterized in that:
Workload in described scanning imaging system can carry out high low energy switching.
7. double source safety check CT scan system according to claim 6, it is characterized in that, described system is used for:
Utilize the high energy of described two cover scanning imaging systems and low energy gamma source to obtain high energy scan-data and the low energy scan-data of same section respectively, rebuild the dual intensity CT image obtaining same section.
8. double source safety check CT scan system according to claim 7, is characterized in that:
In described double source safety check CT scan system, the pace of travelling belt is identical with the sweep velocity of often overlapping scanning imaging system.
9. double source safety check CT scan system according to claim 5, it is characterized in that, described system is used for:
The scan-data of described two cover scanning systems is utilized to rebuild the monoenergetic CT image of acquisition two width or several different sections.
10. double source safety check CT scan system according to claim 9, is characterized in that:
The scan-data of described two cover scanning systems is complementary, and the complete CT image of acquisition one is rebuild in the described scan-data combination based on complementation.
11. double source safety check CT scan systems according to claim 10, is characterized in that:
In described double source safety check CT scan system, the pace of travelling belt is 2 times of the sweep velocity of often overlapping scanning imaging system.
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| CN201420827295.5U CN204269846U (en) | 2014-12-23 | 2014-12-23 | A kind of double source safety check CT scan system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104570139A (en) * | 2014-12-23 | 2015-04-29 | 清华大学 | Double-source security-check CT scanning system and scanning method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104570139A (en) * | 2014-12-23 | 2015-04-29 | 清华大学 | Double-source security-check CT scanning system and scanning method |
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