CN2525512Y

CN2525512Y - Screw three dimension data access device based on perspectivity

Info

Publication number: CN2525512Y
Application number: CN 01251179
Authority: CN
Inventors: 侯建华; 罗宁; 韩军; 温铭; 秦嘉川; 杜光明; 林峰; 徐刚
Original assignee: Dalian Modern Hi Tech Development Co Ltd
Current assignee: Dalian Modern Hi Tech Development Co Ltd
Priority date: 2001-10-26
Filing date: 2001-10-26
Publication date: 2002-12-11
Anticipated expiration: 2011-10-26

Abstract

The utility model discloses a screw three-dimension data access device based on perspectivity, which comprises a ray head which can emit taper bunch, a perspectivity image receiver, a diagnosis bed which can move up and down, left and right and back and forth, a sliding ring which can rotate around a central axle in the plane. The biggest ray range of the ray head is in accordance with the biggest effective receiving face in the image receiver. The corresponding position of the ray head and the image receiver in the sliding ring is not changed. The utility model is of a simple structure, low cost and easy maintenance; therefore the utility model has bigger advantage than CT machine in data collecting time and image resolution.

Description

Spiral three-dimensional data deriving means based on perspective

One, technical field

The utility model relates to the deriving means of three-dimensional data, continuous or the step-by-step movement rotation perspective of particularly a kind of employing, after the real-time image collection, can obtain the spiral three-dimensional data deriving means based on perspective of three-dimensional data information again by the three-dimensional reconstruction algorithm.

Two, background technology

Traditional radioscopy method has been widely used in medical institutions and the industrial nondestructive testing.After X-ray generator sends X ray, ray produces image by object to be detected on video receiver, can obtain 2 d fluoroscopy image information clearly by video receiver, but obtain three-dimensional information, can't accomplish by this method.

Computed tomography imaging device (CT) was invented the seventies in 20th century.By the CT technology, can obtain the cross-sectional image of three-dimensional body, by scanning different tomographies, can recognize the volume data information of three-dimensional body by the method for reverse engineering.But because CT scan interlamellar spacing generally all big (comparatively speaking) with the video beam spacing of cross-sectional image, the volume data precision that obtains by this method is not high, though occurred spiral CT machine now, also had problems such as detector size is big, sweep time is long; And it is not high that common CT machine and spiral CT machine all exist complex structure, picture resolution, shortcomings such as equipment price costliness.

Three, summary of the invention

The purpose of this utility model is promptly at the problems referred to above of common perspective imaging and CT imaging, the advantage of spiral CT is combined with the advantage of having an X-rayed imaging, a kind of simple in structure, cheap, device that can obtain three-dimensional data is fast proposed, it both can obtain high-resolution volume data, can finish the entire scan of object again fast.

In the spiral three-dimensional data deriving means based on perspective of the present utility model, comprise the ray head 1 that to launch conical beam, fluoroscopy image receiver 2, the diagnostic couch 3 that can seesaw up and down, the slip ring 4 that planar can rotate around central shaft, the maximal rays open country of ray head 1 outgoing is consistent with maximum effective receiving plane at image receiver 2 places, and ray head 1 remains unchanged with the relative position of fluoroscopy image receiver 2 on slip ring 4.Wherein ray head 1 comprises radiographic source 6 and the adjustable collimating apparatus 7 of openings of sizes.

In the utility model, the ray head can be launched conical beam, and this conical beam forms and the corresponding two-dimensional image of transmitted intensity on the reception end face of fluoroscopy image receiver by behind the object to be detected.By ray head and fluoroscopy image receiver rotates around central shaft under the constant situation of relative position keeping, the collection of cooperation high speed image can obtain a series of images under the different rotary angle.

Under the motionless situation of diagnostic couch, can obtain a series of fluoroscopy image by above-mentioned once rotation, these images are adopted conical beam three-dimensional data reconstruction algorithm, once can obtain disconnected volume data information in district of object to be detected.

Do a plane vertical if cross radiographic source with rotary middle spindle, this plane and image receive plane intersect at a line, to the two-dimensional image that obtains under the different angles, the ganmma controller on this line is extracted, can obtain the section image of object to be detected by the CT reconstruction algorithm of standard.

If when central shaft rotates, diagnostic couch is moved along the rotation center direction of principal axis, then because the relative motion of the two can form the spiral scan track at ray head and fluoroscopy image receiver.Meanwhile, in conjunction with the high speed image collection, can obtain under the different rotary angle, a series of images of space diverse location by suitable algorithm, can once obtain being scanned all data messages in zone.

Because the acquisition time of pictorial data can be very fast, so radiographic source and picture receiver also can be done very soon around the speed that central shaft rotates.Because radiographic source and picture receiver whenever rotate a circle around central shaft and can obtain scanned object along the information on very big one section interval on the rotation center direction of principal axis, so, the pace of diagnostic couch also can be very fast, avoid unnecessary information overlap, obtain so the utility model can be realized quick volume data.

Because the picture information that adopts fluoroscopy image receiver 2 to obtain, its resolution is higher, thereby can make the image as a result of reconstruction that higher resolution is arranged.

Therefore, the utility model is not only simple in structure, and cost is low, is easy to safeguard, and all has greater advantage than the CT machine on data acquisition time and picture resolution.

Four, description of drawings

Fig. 1 is an overall schematic of the present utility model.

Fig. 2 is a diagrammatic cross-section.

Fig. 3 is that diagnostic couch is motionless and synoptic diagram that ray head and image receiver rotate around central shaft.

Fig. 4 is that ray head and image receiver rotate around central shaft, and diagnostic couch moves along axis direction simultaneously, thereby forms the synoptic diagram of spiral fashion track while scan.

is depicted as the direction that moves forward and backward of therapeutic bed among Fig. 1-Fig. 4.

Be depicted as ray head and image receiver sense of rotation.

Four, embodiment:

As Fig. 1-shown in Figure 4, among the embodiment, the utility model comprises ray head 1, fluoroscopy image receiver 2, the slip ring 4 and the diagnostic couch 3 that planar can rotate around central shaft.Wherein ray head 1 comprises radiographic source 6 and collimating apparatus 7, the openings of sizes scalable of collimating apparatus 7, and ray head 1 can be launched the cone beam; Fluoroscopy image receiver 2 can be image amplifier, perhaps be direct or indirect formula DDR image dash receiver (being tft array), it perhaps is intensifying screen, CR IP plate etc., maximal rays open country from collimating apparatus 7 outgoing, be in maximum effectively receiving plane unanimity at fluoroscopy image receiver 2, ray head and fluoroscopy image receiver 2 can rotate around central shaft on slip ring 4 keeping under the constant situation of relative position, and diagnostic couch 3 can seesaw up and down.5 is casing.

Claims

1, a kind of spiral three-dimensional data deriving means based on perspective, it is characterized in that: it comprises the ray head (1) that can launch conical beam, fluoroscopy image receiver (2), the diagnostic couch (3) that can seesaw up and down, the slip ring (4) that planar can rotate around central shaft, the maximal rays open country of ray head (1) outgoing is located consistent with maximum effective receiving plane at image receiver (2), ray head (1) remains unchanged with the relative position of fluoroscopy image receiver (2) on slip ring (4).

2, the spiral three-dimensional data deriving means based on perspective as claimed in claim 1, it is characterized in that: ray head (1) comprises radiographic source (6) and the adjustable collimating apparatus of openings of sizes (7).