CN2363299Y

CN2363299Y - Tomosynthesis three-dimension holographic indicator for making diagnostic image

Info

Publication number: CN2363299Y
Application number: CN 98244983
Authority: CN
Inventors: 刘守; 张向苏
Original assignee: Xiamen University
Current assignee: Xiamen University
Priority date: 1998-10-29
Filing date: 1998-10-29
Publication date: 2000-02-09
Anticipated expiration: 2008-10-29

Abstract

The utility model relates to a device which obtains a three-dimensional hologram by using a laser light, and comprises two hologram recording devices composed of two-dimensional separation stratifications and three-dimensional white-light reproducing dislocations. A two-dimensional device is composed of a laser device, an adjustable spectroscope, a reflecting mirror, an expanding space filter, a collimating lens, ground glass, a holographic plate and a slit light baffle plate, and a three-dimensional device is composed of the laser device, the adjustable spectroscope, a reflecting mirror, an expanding space filter, a collimating lens and the ground glass and the holographic plate of the two-dimensional device. A group of CT or MRI scan photos shot from different depths are recorded to the same hologram and a three-dimensional structure perspective view which displays in white light by using a stratification partition storage method.

Description

Make the fault complex 3D hologram display device that medical imaging diagnosis is used

This device relates to a kind of device that laser is obtained three-dimensional hologram of using.

Positions such as human organ, bone, blood vessel are three-dimensional structure, but when doing the illness inspection, what conventional CT or MRI scanned photograph were shown all is two dimensional image, the two-dimensional ct or the MRI image of the necessary integrated multilayer of doctor, through thinking analysis, in the brains of oneself, form three-dimensional " virtual image ", just can carry out clinical diagnosis and formulate operation plan." yet this result is very unreliable " is said as famous CT expert Wu Enhui professor, " and for non-CT specialist, particularly the operator understands comparatively difficulty." inventor provides a kind of two dimension rainbow hologram producing device that glitters in the CN2201684Y patent; it is by laser instrument; reflector group; spectroscope; beam expanding lens; beam expanding lens and wave filter, composition such as mask and holographic plate, the laser beam of laser instrument output is divided into two bundles through reflector group and spectroscope, a branch of is thing light, another bundle is a reference light, reference light directly is mapped on the mask and holographic plate of tight contact after beam expanding lens expands the Shu Bingjing filter filtering, wherein said thing light expands into a hot spot through beam expanding lens earlier also to be thrown on frosted glass, is mapped on the mask and holographic plate of tight contact again.

The purpose of this device is to provide a kind of device that utilizes laser hologram technique to make Three-dimensional fault drawing organization of human body skeleton view, the situation and the position of, form a prompt judgement out disease sites more accurate in the diagnostic imaging process to assist a physician.

This device comprises that two dimension is separated layering hologram recorder (abbreviation two-dimensional device) and three-dimensional white light reappears fault complex hologram recorder (abbreviation three-dimensional devices), two-dimensional device comprises laser instrument, adjustable spectroscope, catoptron, expansion bundle spatial filter, collimation lens, frosted glass, holographic plate and slit light barrier, the light path setting of each parts is that laser beam from laser emitting is behind adjustable spectroscope, wherein a branch of through catoptron and expansion bundle spatial filter, conduct arrives the recording medium holographic plate with reference to light behind the collimation lens collimation again; Behind another Shu Jingkuo bundle spatial filter and the catoptron, be projeced on the frosted glass as diffusing screen, CT to be recorded or MRI sheet are close to diffusing screen frosted glass.The light that diffusion is come out on CT or the MRI sheet just arrives holographic plate as thing light, forms with reference light and interferes, and notes interference fringe on holographic plate, before the slit light barrier is positioned at holographic plate.Three-dimensional devices comprises laser instrument, adjustable spectroscope, catoptron, expand the bundle spatial filter, collimation lens, the frosted glass of two-dimensional device, holographic in version, the light path setting of each parts is that laser beam from laser emitting is after adjustable spectroscope beam split, wherein a branch of through catoptron and expansion bundle spatial filter, and behind collimation lens collimation as the reproduction light of the frosted glass of two-dimensional device, the reference light conjugation of holographic plate in its direction of illumination and the two-dimensional device is from the thing light arrival recording medium holographic plate of breast real image as the 2nd hologram of two-dimensional device frosted glass reproduction; Another Shu Guang is through catoptron and expand the bundle spatial filter, is incident to holographic plate as reference light, with the thing interference of light and note the 2nd hologram.

Utilize the two step method recorded hologram of laser rainbow holography.The first step adopts layering and zoning method record Fresnel hologram.Way is that each of one group of CT or MRI tomoscan sheet is opened the zones of different be recorded in same holographic version respectively, to guarantee high diffraction efficiency.In recording process, every photo is carried out single exposure separately as thing.Arrive the corresponding with its difference of holographic version between each photo in the actual human body degree of depth apart from difference.Write down the hologram that comes out like this and be called H ₁Second step was with H ₁The breast real image that reappears out with laser records on the holographic version of another piece as thing, is called H ₂, form the organization of human body three-dimensional perspective of available white-light visualization.

This device utilizes the layering and zoning storage method of laser holography, and CT or MRI scanned photograph that one group (several to up to a hundred) are taken from the different degree of depth record on same the hologram, demonstrate the structure skeleton view of a solid under white light.The scanned photograph that the aspect of each different depth on this stereographic map is taken corresponding to different depth is so be the true reproduction of whole human body structure.Utilize this 3-D view and combination with reference to two-dimensional ct or MRI photo, can assist a physician accurately, ill situation and position form a prompt judgement, and can effectively help non-diagnostic imaging medical practitioner (as surgeon) to formulate operation plan, and help the understanding of patient to the state of an illness.

The hologram that this device is produced has following characteristics:

1) record H ₁The time do layering and zoning exposure, so can obtain high-diffraction efficiency (being high brightness).

2) each tomographic image of Chong Xianing is vertically being arranged with different depth, presents the perspective picture of an integral body, and the image between each layer does not disturb mutually.

3) reappearing each tomographic image that has color distinction, when helping the doctor and observing to the judgement of each position accurate location.

4) hologram is transparent, can equal to make the doctor to observe inner case from two reverse directions of same human body from the positive and negative both direction, and this is the effect that any image is not all accomplished.

Fig. 1 is that two dimension is separated the layering hologram recorder.

Fig. 2 is that three-dimensional white light reappears the fault complex hologram recorder.

As shown in Figure 1, 2, hologram is finished by two step records.Device among Fig. 1 is to be used for writing down H ₁, comprising: laser instrument 1, adjustable spectroscope 2, catoptron 3,4 expands bundle spatial filter 5,6, collimation lens 7, frosted glass 8, one groups of scanning human body CI or MRI photo 9, holographic plate 10, slit light barrier 11 etc.Behind adjustable spectroscope 2, wherein a branch of through catoptron 3 and expansion bundle spatial filter 5, conduct arrives minute book medium 10 with reference to light behind collimation lens 7 collimations again from laser instrument 1 emitting laser bundle; Behind another Shu Jingkuo bundle spatial filter 6 and the catoptron 4, be projeced on the frosted glass 8 as diffusing screen, CT to be recorded or MRI sheet 9 are close to diffusing screen 8.The light that diffusion is come out on 9 just arrives 10 as thing light, forms with reference light and interferes, and notes interference fringe on holographic plate.After each exposure, with the spacing distance of diffusing screen frosted glass 8 (or forward) mobile adjacent scanned photograph behind optical axis direction, change another photo then, simultaneously slit light barrier 11 is laterally moved the distances of slits, expose once more then, till all photos have all write down.The light transmission part of slit light barrier is vertical strip, is used to control the posting field of each photo.The width of slit is 3～10mm, and the many more slits of the photo number of record should be narrow more, because the overall width of all exposure areas is restricted, generally is about 13cm.

Figure 2 shows that the optical devices of the second step record, be used to write down H ₂, comprising: laser instrument 21, adjustable spectroscope 22,

catoptron

23,24 expands bundle

spatial filter

25,26, collimation lens 27, H ₁8, holographic plate 29 etc.After adjustable spectroscope 22 beam split, wherein a branch of from laser instrument 21 emitting laser bundles through catoptron 23 and expansion bundle spatial filter 25, and behind collimating mirror 27 collimations, as H ₁8 reproduction light.H among its direction of illumination and Fig. 1 ₁10 reference light conjugation.From H ₁The 8 breast real images that reappear arrive recording medium H as the thing light of second hologram ₂On 29.Another Shu Guang arrives H as reference light with about 40 ° incident angle through catoptron 24 and spatial filter 26 ₂29, with the thing interference of light and at H ₂On note second hologram.After developing, bleaching processing, H ₂Just can be observed under white light that clear, depth perception is strong, the non-interfering three-dimensional image of image between each tomography.

Claims

1. make the fault complex 3D hologram display device that medical imaging diagnosis is used, it is characterized in that being provided with:

1) two dimension is separated the layering hologram recorder, it comprises laser instrument, adjustable spectroscope, catoptron, expansion bundle spatial filter, collimation lens, frosted glass, holographic plate and slit light barrier, the light path setting of each parts is that laser beam from laser emitting is behind adjustable spectroscope, wherein a branch of through catoptron and expansion bundle spatial filter, conduct arrives the recording medium holographic plate with reference to light behind the collimation lens collimation again; Behind another Shu Jingkuo bundle spatial filter and the catoptron, be projeced on the frosted glass as diffusing screen, CT to be recorded or MRI sheet are close to frosted glass, the light that diffusion is come out on CT or the MRI sheet just arrives holographic plate as thing light, form interference with reference light, before the slit light barrier is positioned at holographic plate;

2) three-dimensional white light reappears the fault complex hologram recorder, it comprises laser instrument, adjustable spectroscope, catoptron, expand the bundle spatial filter, collimation lens, the frosted glass of two-dimensional device, holographic plate, the light path setting of each parts is that laser beam from laser emitting is after adjustable spectroscope beam split, wherein a branch of through catoptron and expansion bundle spatial filter, and behind collimation lens collimation as the reproduction light of the frosted glass of two-dimensional device, the reference light conjugation of holographic plate in its direction of illumination and the two-dimensional device, from the thing light arrival recording medium holographic plate of breast real image as the 2nd hologram of two-dimensional device frosted glass reproduction: another Shu Guang restraints spatial filter through catoptron and expansion, be incident to holographic plate as reference light, with the thing interference of light and note the 2nd hologram.