CN100548223C - Ultrasonic diagnostic equipment - Google Patents
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- CN100548223C CN100548223C CNB2004800167907A CN200480016790A CN100548223C CN 100548223 C CN100548223 C CN 100548223C CN B2004800167907 A CNB2004800167907 A CN B2004800167907A CN 200480016790 A CN200480016790 A CN 200480016790A CN 100548223 C CN100548223 C CN 100548223C
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Abstract
Disclose a kind of reference image display method and ultrasonic diagnostic equipment of ultra sonic imaging, wherein caught ultrasonoscopy (105,106) by ultrasonic probe (104).The corresponding tomographic image of the plane of scanning motion by extraction and ultrasonoscopy from obtained and be stored in the volumetric image data the volume data memory element (107) in advance by diagnostic imaging apparatus (102) obtains benchmark image (111).Go up demonstration ultrasonoscopy and benchmark image (111) at identical screen (114).In this case, extracted and shown the benchmark image that has same area with ultrasonoscopy that is produced with the part of the corresponding benchmark image of the scope of checking of ultrasonoscopy and with sector image.
Description
Technical field
The present invention relates to the reference image display method of ultra sonic imaging and the ultrasonic diagnostic equipment of this method of use.More specifically, the present invention relates to a kind of technology, this technological selection be used to use the patient who obtains by diagnostic imaging apparatus the multi-layer image data, come real-time reconstruction with the benchmark image of ultrasonic scanning plane identical cross-section, and be used on identical screen, showing benchmark image and ultrasonoscopy.The example of this diagnostic imaging apparatus comprises ultrasonic diagnostic equipment, nuclear magnetic resonance (MRI) equipment and X ray computer tomography (X-ray CT) equipment.
Background technology
Be usually used in diagnosis as a kind of ultrasonic diagnostic equipment of diagnostic imaging apparatus, because their easy operating and can executed in real time being observed by the non-infringement of any cross section.On the other hand, the ultrasonoscopy of being caught by ultrasonic diagnostic equipment is than the tomographic image of being caught by tomography X equipment etc., and picture quality is poorer usually.Therefore, carrying out and the tomographic image (hereinafter tomographic image is called " benchmark image ") of catching when comparing, can carry out comprehensive diagnosis by other diagnostic imaging apparatus of for example tomography X equipment or MRI equipment.For example, when treating liver abscess etc. by radio-frequency ablation procedure (rediofrequencyablation) under the guiding at ultrasonoscopy, can think partly and use its CT image to carry out the guiding of ultrasonoscopy as benchmark image by the pre-aligned treatment of CT diagnosis.
Yet,, distinguish that the incidence relation between the image is great burden for the operator when CT image or MR image during only as benchmark image.This be because the benchmark image that provides by CT image or MR image typically perpendicular to tomographic image body axes, cross section, and ultrasonoscopy is the tomographic image by the specified any cross section of operator.
Non-patent literature 1 has been described a kind of method of being convenient to distinguish the incidence relation between benchmark image and the ultrasonoscopy.In the method, position sensor links to each other with ultrasonic probe, so that determine the ultrasonic scanning plane, and rebuild with the benchmark image of ultrasonic scanning plane identical cross-section and manifest (render) on display screen from the multi-layer image data (hereinafter being called " volumetric image data (volume image data) ") of CT image or MR image.Similarly, patent documentation 1 also proposes a kind of technology, wherein rebuild benchmark image with ultrasonic scanning plane identical cross-section from the volumetric image data of CT image or MR image, and according to aiming at or synergetic mode or on display screen, manifest ultrasonoscopy according to the mode of alternately switching.
Patent documentation 2 has proposed a kind of technology, is used for the auxiliary operation of puncture needle being introduced health.That is, control the ultrasonic scanning plane, and cut out out and corresponding benchmark image in ultrasonic scanning plane and demonstration so that comprise puncture needle.In this technology, two labellings are attached to body surface and the ill scope of patient is corresponding, puncture needle is the position of inserting, and obtain the volumetric image data of benchmark image.In addition, in the introducing of puncture needle ultrasonic probe is set partly, so that fix this position and the puncture needle angle with respect to probe, and the pick off that is used to detect this position and head angle links to each other with probe, so that definite ultrasonic scanning plane.In this manner, the planar coordinate system of the coordinate system of volumetric image data and ultrasonic scanning is interrelated, and cuts out out and corresponding benchmark image in ultrasonic scanning plane and demonstration.
Non-patent literature 1: be published in " Radiology " RNSA in 1996,517 pages, K.Oshio
Patent documentation 1: the open No.10-151131 of Japanese Unexamined Patent Application
Patent documentation 2: the open No.2002-112998 of Japanese Unexamined Patent Application
Summary of the invention
Yet, in the prior art,, do not consider to be used to mate the scheme of viewing area and the amplification of benchmark image and ultrasonoscopy although cut out out with the benchmark image of the corresponding cross section of ultrasonoscopy and be presented on the identical screen.For example, ultrasonoscopy is the sector image that obtains by a part of catching patient's live body, and the circular image that CT image or MR image obtain by the whole health of catching the patient typically.Therefore, when only showing benchmark image and ultrasonoscopy, exist to be difficult to distinguish that he or she wishes the problem of the incidence relation of the part of observing according to aligned mode.
In addition, for obtain one comprise target (for example ill scope), by the operator at the benchmark image ultrasonoscopy in specified zone of anticipating of taking up an official post, he or she must operate the zone that ultrasonic probe search comprises target.Yet, in the prior art, there is a problem, do not consider the scheme of the position relation of being convenient to distinguish between current ultrasonic scanning plane and the target.
Therefore, first purpose of the present invention is to be convenient to distinguish the ultrasonoscopy that is presented on the same screen and the incidence relation between the benchmark image, and benchmark image is obtained by another diagnostic device.
Second purpose of the present invention is to be convenient to distinguish by the operator in the position relation between specified target and the current ultrasonic scanning plane on any benchmark image.
In order to realize first purpose, ultrasonic diagnostic equipment of the present invention comprises: the ultrasonoscopy generator is used for according to the echotomography photographs of rebuilding the plane of scanning motion from the reflection echo signal of ultrasonic probe output; Storage device is used to store the better volumetric image data of the picture quality than echotomography photographs that is obtained in advance by diagnostic imaging apparatus; The benchmark image generator is used for from the volumetric image data that is stored in storage device extracting corresponding with ultrasonic tomogram photographs benchmark tomographic image data, and reconstruction benchmark tomographic image; Control device is used to make benchmark tomographic image and echotomography photographs to be presented at screen; And display device, be used to show benchmark tomographic image and ultrasound tomographic image.Concern according to the position between benchmark tomographic image data and ultrasonic probe and the patient, the tomographic image data that the benchmark image generator extracts from volumetric image data with the corresponding part of the scope of checking of echotomography photographs produce the benchmark tomographic image, show in the described benchmark tomographic image that generates the corresponding part of the scope of checking with described echotomography photographs with the amplification identical with the echotomography photographs.
Therefore, according to the present invention,, may be easy to distinguish two incidence relations between the image because shown and the fan-shaped benchmark image of checking the corresponding same area of ultrasonoscopy of scope with sector image.In this case, preferably, show zone with the corresponding benchmark tomographic image of the scope of checking of echotomography photographs, the distinguishing of the incidence relation between further convenient two images with the amplification identical with the echotomography photographs.Also preferably, reduce the brightness of checking the tomographic image outside the scope of echotomography photographs, carry out demonstration.Utilize this set, may under the information of not losing benchmark image, carry out relatively and observe.
In addition, further be convenient to distinguish two incidence relations between the image according to analog form in the acoustic shadow (acoustic shadow) that shows the echotomography photographs on the benchmark tomographic image.In addition, can on screen, show echotomography photographs and benchmark tomographic image according to aligned mode, but be not limited to such configuration at this.The composograph that can on screen, show ultrasonoscopy and benchmark image.Composograph can be the image that the translucent image by stack benchmark tomographic image on the echotomography photographs obtains.In addition, composograph can be the difference images between benchmark tomographic image and the echotomography photographs.
Preferably, the benchmark image generator changes the picture size of benchmark image according to the translational speed of ultrasonic probe.This makes and may show benchmark image according to the fast moving of ultrasonoscopy, therefore improves relatively and the viewing duration operation degree of freedom of popping one's head in.
In order to realize second purpose, ultrasonic diagnostic equipment of the present invention comprises 3D body marker determining unit, position relation between the target that is used for determining the plane of scanning motion and being arranged on volumetric image data, so as to make target with respect to the direction of the plane of scanning motion and distance display on screen.
In addition, ultrasonic diagnostic equipment of the present invention also comprises: cine memory (cine-memory) is used to store the echotomography photographs of being rebuild by the ultrasonoscopy generator; Position sensor is used to detect the position and the inclination angle of ultrasonic probe; Plane of scanning motion coordinate is determined device, is used for according to the plane of scanning motion coordinate of determining the echotomography photographs from the output of position sensor; And plane of scanning motion coordinate system storage device, be used to store definite plane of scanning motion coordinate.The benchmark image generator reads the plane of scanning motion coordinate of echotomography photographs, the plane of scanning motion coordinate corresponding benchmark tomographic image data that read and read and rebuilds the benchmark tomographic image from volumetric image data from plane of scanning motion coordinate system storage device.Image processing apparatus reads the echotomography photographs and shows and read from cine memory the corresponding benchmark image of echotomography photographs, benchmark image is exported from the benchmark image generator.According to this set,, can use moving image to carry out comparison and observation because from cine memory, read successively and show ultrasonoscopy and cut out out successively and demonstration and the corresponding benchmark image of ultrasonoscopy.
Also preferably, ultrasonic diagnosis at least also comprise be used to detect the attitude transducer that patient's attitude changes and be used to detect breathing pick off one of at least, and having correcting device, the amount that is used for moving according to the internal that attitude changes or breathing causes owing to the patient during ultrasonic diagnosis is corrected plane of scanning motion coordinate.Utilize this set, can correct between benchmark image coordinate system and the ultrasonoscopy coordinate system, move the skew that is produced owing to patient's breathing or attitude change the internal who causes.Therefore, can improve the degree of accuracy of the comparison and the observation of two images.
In addition or instead, configuration can be: the plane of scanning motion that has scanned ultrasonic probe and search and freeze the echotomography photographs and the benchmark tomographic image among have of particular point after, handle ultrasonic probe, an image that shows and freeze except the echotomography photographs that freezes or benchmark tomographic image and be complementary with that image that freezes, and determine the plane of scanning motion coordinate of that image of freezing and the coordinate difference between another image, so that can correct plane of scanning motion coordinate according to the coordinate difference of determining.
In addition, except above-mentioned configuration, ultrasonic diagnostic equipment can comprise: position sensor is used under Basic Reference Coordinate System detecting the position and the inclination angle of ultrasonic probe; Plane of scanning motion coordinate is determined device, is used for the plane of scanning motion coordinate according to the echotomography photographs of determining from the output of position sensor to be caught under Basic Reference Coordinate System by ultrasonic probe; Datum mark input equipment is used on the benchmark tomographic image that is presented on the screen datum mark being set according to the volumetric image data that obtains under Basic Reference Coordinate System; The volume data coordinate is determined device, be used for position by determining ultrasonic probe and corresponding with datum mark and be present in, come the tomographic data coordinate of definite volumetric image data that is associated with plane of scanning motion coordinate by making contact with body surface coordinate relation between the zone on the echotomography photographs that obtains of ultrasonic probe; And volume data coordinate storage device, be used for storage and determine the determined tomographic image data coordinates of device by the volume data coordinate.The benchmark image reconstructing device can read from volume data coordinate storage device and the coordinate of being determined the tomographic image data that the determined plane of scanning motion coordinate of device is associated by plane of scanning motion coordinate, and generates benchmark image.Utilize this set, can be provided for the datum mark of alignment coordinates system in patient's body inside.Therefore, the prior art than datum mark is set at body surface has increased the degree of freedom that datum mark is set, and has therefore further improved the degree of accuracy that compares and observe.
Description of drawings
Fig. 1 is the block diagram of basic ultrasonic image-forming system of having used the ultrasonic diagnostic equipment of one embodiment of the invention.
Fig. 2 is the block diagram of particular diagnostic imaging system of having used the ultrasonic diagnostic equipment of another embodiment of the present invention.
Fig. 3 is the flow chart of the drawing process of ultrasonoscopy in one embodiment of the invention and benchmark image.
Fig. 4 shows the view of demonstration example of ultrasonoscopy, benchmark image, composograph and the 3D body marker of the characteristics according to the present invention.
Fig. 5 shows ultrasonoscopy, benchmark image, the composograph of the characteristics according to the present invention and the view of the demonstration example of the 3D body marker that is preferred for navigating.
Fig. 6 is the block diagram of particular diagnostic imaging system of having used the ultrasonic diagnostic equipment of another embodiment of the present invention.
Fig. 7 is the block diagram of the probe that has position sensor in according to one embodiment of present invention.
Fig. 8 shows configuration and the processing procedure that respiratory capacity according to the present invention is determined device.
Fig. 9 is the plane of scanning motion coordinate determining unit among the embodiment shown in Figure 2 and the more detailed block diagram of plane of scanning motion coordinate storage unit.
Figure 10 is the flow chart that is used for the initialization procedure of coordinate relevant treatment among the embodiment shown in Figure 6.
Figure 11 is the flow chart of the embodiment of the benchmark image display process during ultrasonic diagnosis among the embodiment shown in Figure 6.
Figure 12 shows the view of the incidence relation between volumetric image data and plane of scanning motion coordinate system.
Figure 13 is the flow chart that is used to correct an embodiment of the Basic Reference Coordinate System skew that causes owing to patient respiratory etc.
Figure 14 shows and is used for the example that the auxiliary coordinate of correcting the processing of plane of scanning motion coordinate is adjusted screen.
Figure 15 shows a kind of view that the internal who causes owing to patient respiratory moves the method for the coordinate system skew that produces that is used to correct.
The specific embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described.
(first embodiment)
Fig. 1 is the block diagram of basic ultrasonic image-forming system of having used the ultrasonic diagnostic equipment of one embodiment of the invention.As shown in the figure, diagnostic imaging system comprises ultrasonic diagnostic equipment 101 according to an embodiment of the invention and is used to obtain medical diagnosis imaging device 102 as the volumetric image data of benchmark image.Volumetric image data (volume image data) is meant the data of the multi-layer image (multi-slice image) that obtains by the inside of catching patient body along a plurality of planes.The data of the volume image of being caught by medical diagnosis imaging device 102 are imported into ultrasonic diagnostic equipment 101.Computed tomography apparatus (X-ray CT equipment) or MR imaging apparatus (MRI equipment) can be used as medical diagnosis imaging device 102.Well-known, CT image and MR image have than ultrasonoscopy better pictures quality, and therefore are applicable to the benchmark image as the relatively poor ultrasonoscopy of picture quality.Yet, when utilizing ultrasonic diagnosis to go out temporary transient variation in the patient tissue, can be used as the volumetric image data that benchmark image is drawn out the ultrasonoscopy that obtains in advance.
Among Fig. 1,, omitted the explanation that is generally comprised within the function in the ultrasonic diagnostic equipment 101, and the function of the formant relevant with the demonstration benchmark image of characteristics according to the present invention only has been described for fear of complexity.As shown in the figure, ultrasonic diagnostic equipment 101 can mainly be divided into and be used to rebuild the part of ultrasonoscopy and the part that is used to rebuild benchmark image.The former ultrasonoscopy is rebuild part and is had probe 104 and ultrasonoscopy determining unit 105.Latter's benchmark image is rebuild part and is had volume data memory element 107 and benchmark image determining unit 111.
Particularly, configuration baseline image determining unit 111, so that its is according to from control unit 120 input and based on the plane of scanning motion coordinate of the relation of the position between probe 104 and the patient, extract the tomographic image data with the corresponding zone of the scope of checking (view area) of ultrasonoscopy, and produce benchmark image.
According to as the above-mentioned and embodiment of the invention of configuration as shown in Figure 1, show the benchmark image and the ultrasonoscopy of catching with the fan-shaped corresponding benchmark image of ultrasonoscopy of checking scope, from same area with sector image.This makes may easily distinguish two incidence relations between the image.In this case, show and the zone of checking the corresponding benchmark image of scope, further be convenient to distinguish two incidence relations between the image with the amplification identical with ultrasonoscopy.In addition, be presented at the zone of checking the benchmark image outside the scope of ultrasonoscopy, allow to compare and observe and do not lose benchmark image information with the brightness that reduces.
(second embodiment)
Fig. 2 is a block diagram of having used the particular diagnostic imaging system of ultrasonic diagnostic equipment of the present invention.In Fig. 2, utilize identical reference number to represent to have the device that disposes with Fig. 1 identical functions, and omitted its explanation.In Fig. 2, plane of scanning motion coordinate determining unit 109 is corresponding with the configuration of the formant of control unit 120 with plane of scanning motion coordinate storage unit 110.The ultrasonoscopy that cine memory 106 storages are rebuild by ultrasonoscopy determining unit 105.3D body marker determining unit 112 is set to link to each other with benchmark image determining unit 111.Adder 113 is configured as image processing apparatus, is used for suitably merging the image that is produced by cine memory 106, benchmark image determining unit 111 and 3D body marker determining unit 112.Monitor 114 is applicable to image that demonstration is produced by cine memory 106, benchmark image determining unit 111 and 3D body marker determining unit 112 and by adder 113 handled images.
Volume data memory element 107 receives the volumetric image data of the benchmark image of being caught by medical diagnosis imaging device 102 by network or via portable storage (MO) medium of for example magneto-optic disk, and volumetric image data is stored in the ultrasonic diagnostic equipment 101.
According to signal from position sensor 108 and source 116 outputs, plane of scanning motion coordinate determining unit 109 obtains the position and the obliquity information of the probe 104 in Basic Reference Coordinate System, so that determine to comprise the plane of scanning motion coordinate of ultrasonic scanning plane with respect to patient 103 position and inclination angle.Plane of scanning motion coordinate determining unit 109 is applicable to that also the definite plane of scanning motion coordinate of basis calculates the plane of scanning motion coordinate in the benchmark image coordinate system.That is, plane of scanning motion coordinate determining unit 109 is applicable to the plane of scanning motion coordinate data of determining in the volumetric image data coordinate system, and these data comprise for example x, y and x, the y of the z coordinate data and the plane of scanning motion and the anglec of rotation of z axle at a turning of the plane of scanning motion.The plane of scanning motion coordinate data of being determined by plane of scanning motion coordinate determining unit 109 is imported in the plane of scanning motion coordinate storage unit 110, and has stored the plane of scanning motion coordinate of a plurality of frames therein.In this case, preferably the number of the frame of the plane of scanning motion coordinate of storage in fact with captured in real time and to be stored in the number of frame of the ultrasonoscopy in the cine memory 106 identical.Benchmark image determining unit 111 provides the benchmark image reconstructing device, and receives the benchmark image of plane of scanning motion coordinate data and reconstruction and ultrasonic scanning image identical cross-section.
Next, operate the detailed configuration that illustrates according to the ultrasonic diagnostic equipment 101 of the embodiment of the invention in conjunction with it.Fig. 3 is used to manifest the ultrasonoscopy of identical cross-section and the flow chart of benchmark image.Draw to handle mainly to be divided into and be used for manifesting ultrasonoscopy and handle sequence 201 and benchmark image processing sequence 202 at the ultrasonoscopy of memory element memory scanning plane coordinates.Carry out this two sequences 201 and 202 with synchronous beginning and freezing method.
At first, when the operator begins these two sequences 201 and 202, determine whether to have imported and freeze to instruct (S1).When not having execution to freeze, ultrasonoscopy is handled sequence 201 and is driven probe 104 to patient's 103 transmissions or from patient's 103 reception ultrasound wave (S2).Ultrasonoscopy determining unit 105 is according to rebuilding ultrasonoscopy (S3) from the reflection echo signal of 104 outputs of popping one's head in.The ultrasonoscopy of rebuilding is stored in the cine memory 106 (S4) and draws out (S5) on monitor 114.
At this moment, position sensor 108 is with hyperacoustic transmission with receive position and inclination angle (S12) that synchronously obtains probe.According to position and the obliquity information from position sensor 108 inputs, plane of scanning motion coordinate determining unit 109 is determined plane of scanning motion coordinate (S13).The plane of scanning motion coordinate of determining is write plane of scanning motion coordinate storage unit 110 (S14) successively.In this case, synchronously carried out mutually ultrasonoscopy and handled the processing of step S1 in the sequence 201 to the processing of S5 and step S12 to S14.
On the other hand, handle in the sequence 202, make determine (S21) about freezing at benchmark image.When execution is not freezed, from plane of scanning motion coordinate storage unit 110, read plane of scanning motion coordinate (S22).According to volumetric image data, benchmark image determining unit 111 is rebuild the benchmark image (S25) with the ultrasonoscopy identical cross-section.On monitor 114, draw out the benchmark image (S26) of reconstruction.Below with the processing of description of step S23 and S24.
Next, when instruction that operator input is used to freeze to handle, in S31 and S32, according to determining among step S1 and the S21, ultrasonoscopy is handled sequence 202 and benchmark image and is handled sequence 202 and be applicable to the execution cineloop respectively.By carrying out the cineloop of ultrasonoscopy with reference to being stored in ultrasound image data in the cine memory 106.Relatively, by use be stored in the plane of scanning motion coordinate storage unit 110 plane of scanning motion coordinate data and by rebuild the cineloop of carrying out benchmark image with the corresponding benchmark image of the plane of scanning motion according to volumetric image data.Synchronously be stored in the plane of scanning motion coordinate data of the ultrasound image data of storage in the cine memory 106 and storage in plane of scanning motion coordinate storage unit 110 mutually, may manifest ultrasonoscopy and benchmark image with identical time phase.By carrying out the cineloop of ultrasonoscopy with reference to being stored in ultrasound image data in the cine memory 106, and by carrying out the cineloop of benchmark image with reference to being stored in plane of scanning motion coordinate data in the plane of scanning motion coordinate storage unit 110.Therefore, the memorizer of plane of scanning motion coordinate storage unit 110 a memory scanning plane coordinates data are just enough, can reduce memory capacity.Similarly, for storing moving image, only storage and the corresponding plane of scanning motion coordinate of volumetric image data make may be when from volumetric image data, rebuilding motion picture the playback motion picture.Therefore, can produce motion pictures files with less document size.
The pictorial display processing method of the characteristics according to the present invention is described in conjunction with Fig. 4 now.At first, according to the amplification factor (amplification) of ultrasonoscopy 302, benchmark image determining unit 111 is amplified or is dwindled benchmark image and show with identical amplification, shown in the benchmark image 301 as shown in Figure 4.Benchmark image determining unit 111 is also extracted and is checked scope 312 outside angle 311 corresponding the checking with ultrasonoscopy 302 fan-shaped and reduce brightness with regional 312 corresponding benchmark images.As a result, shown benchmark image, thereby made and be easy to distinguish incidence relation between ultrasonoscopy 302 and the benchmark image with the display format identical and with the amplification identical with ultrasonoscopy 302 with ultrasonoscopy 302.This set also may be carried out the information that shows and can not lose benchmark image in scope outside the checking of ultrasonoscopy.In addition, on ultrasonoscopy 302, manifest for example acoustic shadow 307 of bone 313 (perhaps air).Preferably, extract and 307 corresponding zones, acoustic shadow, and reduce the brightness of the scope 308 darker than this zone according to definite (for example using the CT value of CT image).Similarly, use CT value from there being the extracted region scope 310 of blood vessel, and for example should the zone with red display, for example Ultrasonic C FM (color blood-stream) image 309.This makes may show benchmark image 301, makes easily to compare with ultrasonoscopy 302.
On the other hand, 3D body marker determining unit 112 is extracted the three-dimensional visible image by using volumetric image data, the 3D body marker 304 of Fig. 4 for example, and the plane of scanning motion 314 of stack translucent color on the three-dimensional visible image, and show the image that produces.For the three-dimensional visible image, can use the known method of for example body development or surface development.Show the 3D body marker 304 feasible position relations that can distinguish between the patient 103 and the plane of scanning motion 314.Be provided with for 3D body marker determining unit 112 from volumetric image data, to extract by the specified area-of-interest of operator and determine distance from the plane of scanning motion to the area-of-interest and the function of direction.
Provide the adder 113 of image processing apparatus to be used for determining the composograph 303 of benchmark image 301 and ultrasonoscopy 302.For example, adder 113 is converted to the edematus image with benchmark image 301 and with on its ultrasonoscopy 302 that is added to.Perhaps, can obtain and draw difference images (difference image) between benchmark image 301 and the ultrasonoscopy 302.This image easy to use comes mutual benchmark image 301 and ultrasonoscopy 302.For example, when the ultrasonic volumetric image data that obtains in advance during as benchmark image, difference images are useful during for the temporary transient change in diagnosis patient's the biological tissue.
Therefore, as shown in Figure 4, on monitor 114, draw ultrasonoscopy 302, benchmark image 301, composograph 303 and the 3D body marker of identical cross-section.This makes the operator relatively carry out effective diagnosis in these images.
For example, use medical diagnosis imaging device 102 obtains the volumetric image data at area for treatment center, makes ultrasonic diagnostic equipment 101 catch the image of area for treatment after treatment and for example shows ultrasonoscopy according to aligned mode at demonstration benchmark image before the treatment and after treating before treating, and is convenient to the effect of definite treatment.In addition, synthesize the difference images and the demonstration difference images for the treatment of between benchmark image before and the treatment ultrasonoscopy afterwards and further be convenient to definite effect for the treatment of.Especially, carrying out demonstration according to the degree of difference according to more color can further be convenient to check.
By reducing picture size and changing frame rate, benchmark image determining unit 111 can be rebuild the speed of benchmark image according to the mobile quickening of probe 104.That is, benchmark image determining unit 111 is determined the translational speed and the rotary speed of the plane of scanning motion according to plane of scanning motion coordinate data.When speed during greater than certain threshold value, benchmark image determining unit 111 reduces picture sizes and rebuilds benchmark image at high speed.That is, when moving of probe 104 was very fast, in order to draw benchmark image at high speed, the priority of frame rate was higher than picture quality, and when moving of probe 104 was slow, the priority of picture quality was higher than frame rate, rebuilds and draw benchmark image.This makes may draw benchmark image, makes it corresponding with the mobile ultrasonoscopy that changes according to probe 104.
Further specify pictorial display processing method with navigation feature in conjunction with Fig. 5.This ultrasonic diagnostic equipment is applicable to will the pop one's head in navigation of the target 405 that sets in advance on the benchmark image of 104 plane of scanning motion guiding operator in volumetric image data of permission.For example can be by on axial plane figure, sagittal figure, crown figure or three-dimensional visible image, utilizing mouse to come setting area target 405.3D body marker determining unit 112 is calculated from the current plane of scanning motion to target the distance and the direction at 405 center, and shows trivector image and numerical value in the viewing area on the screen of 3D body marker 404 407.The border that in benchmark image 401 and ultrasonoscopy 402, also manifests the zone of target 405.This makes the operator can visually distinguish the distance from current ultrasonic scanning plane 314 to target 405.When target 405 enters the plane of scanning motion 314, in ultrasonoscopy 402, also show the border of from benchmark image 401, determining.Therefore, be easy to distinguish incidence relation between benchmark image 401 and the ultrasonoscopy 402.
In addition, display operation person on all images at the area-of-interest (ROI) 406 that is provided with on any among ultrasonoscopy 402, benchmark image 401 and the composograph 403.This is convenient to distinguish the incidence relation of area-of-interest.
(the 3rd embodiment)
Fig. 6 shows the configuration of the diagnostic imaging system of the ultrasonic diagnostic equipment of using another embodiment of the present invention.In Fig. 6, be to be provided with the respiration pickup 117 of the respiratory capacity that is used to detect patient 103 and be used to detect the attitude transducer 118 that health moves with embodiment shown in Figure 2 different, and the output that detects is imported into plane of scanning motion coordinate determining unit 109.Although in the embodiment of Fig. 2, omitted the processing that makes the volumetric image data coordinate system relevant, will describe this processing in detail below with plane of scanning motion coordinate system.
In the present embodiment, shown in Fig. 7 A, position sensor 108 is attached to a probe surface of 104, so as may be in by source 116 formed coordinate systems the position and the inclination angle of detection probe 104, that is, and planar position of ultrasonic scanning and inclination angle.In Fig. 7 A, transducer is set on probe 104 the arcuate surface, and accurately determines the distance between the central point 202 of the central point 201 of transducer and position sensor 108.Relation between probe 104 and the position sensor 108 is not limited to the relation shown in the figure, and can be configured to shown in Fig. 7 B.That is, be provided with can be bar shaped pointer 203 be associated with position sensor 108 separably and the end 204 of pointer 203 as datum mark with respect to central point 202.Utilize this set, the probe 104 of present embodiment can also be used as pointing apparatus.
According to the mode identical with position sensor 108, attitude transducer 118 is attached to patient 103 body surface, so that measure patient 103 position and inclination angle in by source 116 formed Basic Reference Coordinate Systems.Respiration pickup 117 is measured patient 103 respiratory capacity.For example, shown in Fig. 8 A, the respiration pickup 117 with the function that is similar to position sensor 108 is attached to the body surface that lies in the patient 103 on the bed 115, so that detect owing to breathe the amount of movement of the body surface that causes.Shown in Fig. 8 B, the amount of movement of measuring can be converted to respiratory capacity.
Although disposed plane of scanning motion coordinate determining unit 109 and plane of scanning motion coordinate storage unit 110 in the same manner with second embodiment in fact, specifically described according to characteristics of the present invention and function.Plane of scanning motion coordinate determining unit 109 has and is used for the function of correcting plane of scanning motion coordinate according to patient 103 attitude information and patient's 103 respiratory capacity.In this used expression by probe 104 ultrasonic scannings of making planar coordinate.As shown in Figure 9, plane of scanning motion coordinate determining unit 109 and plane of scanning motion coordinate storage unit 110 comprise: plane of scanning motion coordinate system memory element 211, volumetric image data coordinate storage unit 212, attitude variable quantity determining unit 213, internal's amount of movement determining unit 214, correction unit 215 and correction plane of scanning motion coordinate determining unit 216.In the embodiment shown in Figure 2, benchmark image determining unit 111 receives plane of scanning motion coordinate, extracts and the corresponding identical cross-section view data of plane of scanning motion coordinate from volume data memory element 107, and rebuilds benchmark image.Adder 113 is drawn on monitor 114 from the benchmark image of benchmark image determining unit 111 outputs and the ultrasonoscopy that reads from cine memory 106 then.Typically on identical screen, showing ultrasonoscopy and benchmark image according to aligned mode, yet or, can show according to synergetic mode.When showing them, wish that benchmark image is translucent according to synergetic mode.
Now, in conjunction with Figure 10,11 and 12 processing that makes the volumetric image data coordinate relevant with plane of scanning motion coordinate is described.The coordinate association process can mainly be divided into initial phase shown in Figure 10 and diagnostic phases shown in Figure 11 in the present embodiment.
At first, initial phase shown in Figure 10 is described, that is, and the processing during the imaging of volumetric image data.In step S101, shown in Figure 12 B, the x axle in the source 116 of position sensor point to bed 115 laterally, the y axle point to bed 115 vertically, and the z axle points to the vertical direction of bed 115, so that the placement source.Therefore, initial point is positioned at x, y and the z axle of coordinate system that x, the y of source coordinate system at 224 places, center in source 116 and z axle and initial point 225 be positioned at a turning of the volumetric image data shown in Figure 12 A and aims at abreast.That is, typically, obtain the volume data 221 shown in Figure 12 A by making patient 103 lie on the bed 115 and catching the tomographic image of body axes (y direction of principal axis) perpendicular to patient 103.Place source 116 with bed 115 with aiming at and make that the coordinate system of x, the y of Basic Reference Coordinate System in source 116 and z axle and volume data 221 is in fact parallel to each other.
Next, in step S102, datum mark 223 is set in volume data 221.The pointing apparatus of mouse is arranged at datum mark 223 on the function screen by for example using.Follow benchmark image, the display operation screen by the volumetric image data imaging is obtained.Function screen can comprise axial plane figure, sagittal figure, crown figure or three-dimensional visible image.On arbitrary image, specify datum mark 223 to make and at body surface or at body interior datum mark 223 in the volumetric image data to be set.
Relatively, in step S103, for example,, the datum mark 222 in the plane of scanning motion coordinate system is set by utilizing position sensor 108 positioning probes 104 in datum mark 223 corresponding positions and keeping probe 104 with volume data 221.For example, when on body surface, specifying the datum mark 222 of volume data, probe 104 contact point 201 is positioned over the body surface position of actual patient 103, and the body surface position is corresponding with datum mark 222, thereby in the plane of scanning motion coordinate system datum mark 222 is set.In this case, because the position of the position of datum mark 222 and datum mark 223 matches each other, the coordinate system of volumetric image data and the coordinate system of the plane of scanning motion are complementary.In this case, probe 104 is as pointing apparatus.At this, in order to be beneficial to the work of placing probe in the body surface position of actual patient, the body surface position is corresponding with the position of specified datum mark in the volumetric image data, selects preferably easily to check from the outside that the particular point (for example xiphoid-process or vessel branch) that finds at body surface is as specified datum mark 223 volumetric image data.
On the other hand, when the datum mark of specifying at body interior in the volumetric image data, the operation probe, show the ultrasonoscopy in the zone that comprises Living Organism benchmark image 223 and on ultrasonoscopy by for example using the pointing apparatus of mouse to specify and Living Organism datum mark 223 corresponding zones.Then, determine specified point and center 202 or 104 the contact point 201 of popping one's head between distance, and the coordinate of two datum marks 222 and 223 is interrelated.In this case, in order easily to discern Living Organism datum mark 223 on ultrasonoscopy, the particular point of preferably selecting to be easy to search on ultrasonoscopy is as specified datum mark in the above-mentioned volumetric image data.
Next, in step S104, determine the relation data that makes plane of scanning motion coordinate system relevant with the Basic Reference Coordinate System in source 116.At first, the patient in real space 103 initial point is set to datum mark 222.The coordinate axes of plane of scanning motion coordinate system is set to parallel with the coordinate axes of source coordinate system.Then, determine the position (X, Y and Z) of the datum mark 222 of probe 104, this position is detected by position sensor 108, and plane of scanning motion coordinate system and source coordinate system are interrelated, and the related data that produces is stored in the plane of scanning motion coordinate system memory element 211 shown in Figure 9.In this manner, make the volumetric image data coordinate system relevant mutually via the Basic Reference Coordinate System in source 116 with plane of scanning motion coordinate system.In step S105, generation is used for making the volumetric image data coordinate system data relevant with plane of scanning motion coordinate system and it is stored in volumetric image data coordinate system memory element 212 shown in Figure 9.
Because placed source 116 in step S101, so the coordinate axes of volumetric image data coordinate system is parallel with the coordinate axes of source coordinate system.A datum mark 223 only is set in the volumetric image data coordinate system to be beneficial to and to make these two coordinate systems relevant.That is, place source 116, easily alignment coordinates system according to suitable direction according to the direction of patient's body axis.Yet, in the present invention, three datum marks 223 can be set also.In this case, can improve the degree of accuracy that makes coordinate system relevant.For example, when utilizing three datum marks to determine coordinate system, one of three points are appointed as the initial point of coordinate system, are appointed as X-axis and Y-axis from initial point to the vector of remaining two points, and are designated as X-axis perpendicular to the axle of x and y axle, thereby realize aiming at.This makes that may to make coordinate system relevant and do not need to consider the direction in the source 116 of placing.Carry out above-mentioned processing by being used in the survey tool of on view data, carrying out measurement, two remaining points can automatically be set on screen.
Volumetric image data coordinate system that is produced as mentioned above and the associated data between the plane of scanning motion coordinate system are used for determining plane of scanning motion coordinate according to process shown in Figure 11 during ultrasonic diagnosis.Plane of scanning motion coordinate determining unit 109 is according to determining plane of scanning motion coordinate (step S106) by the position and the inclination angle of the position sensor 108 detected probes 104 that are attached to probe 104.Next, benchmark image determining unit 111 is cut out out from volumetric image data and the corresponding benchmark image of plane of scanning motion coordinate, and makes benchmark image be presented at (step S107) on the monitor 114 via adder 113.This operator can be drawn follow with pop one's head in the benchmark image that position and the corresponding ultrasonoscopy of direction are complementary is set arbitrarily, thereby improve the degree of accuracy of diagnosis.
Next, explanation is used for the characteristics and the function of correcting the present embodiment of plane of scanning motion coordinate according to the variation of attitude etc.That is, when diagnosis is carried out, because for example variation of patient's attitude and because the internal's that causes of patient respiratory the factor that moves understands being offset between the coordinate system of the volumetric image data and the plane of scanning motion.This skew makes can not draw the benchmark image that is complementary with the ultrasonic scanning plane.Therefore, in the present embodiment, in diagnostic phases, plane of scanning motion coordinate determining unit 109 is applicable to the skew of correcting in the plane of scanning motion coordinate system.
The variation of correcting patient's attitude at first is described.Can utilize attitude transducer shown in Figure 6 118 to detect patient's attitude.Therefore, determine in attitude during the initialization and the difference between the attitude between diagnostic period, and according to this difference, moving also, rotary scanning plane coordinates system carries out correction by attitude variable quantity determining unit 213.
Next, illustrate in conjunction with Figure 13 and be used to correct because the internal that patient's breathing causes moves the coordinate system skew that is produced.The operator carries out this correction and handles when checking the benchmark image that manifests and ultrasonoscopy.The operator at first notes benchmark image.For example, the operator shows the patient vessel's who comprises portal vein for example or superior mesenteric artery special cross section in operation probe 104, and carries out and freeze (step S201).Next, the operator notes ultrasonoscopy, and is carrying out and manifesting the cross section identical with the freeze frame of benchmark image and carry out adjustment (step S202) when freeze frame carries out direct visual comparison.At this, the plane of scanning motion coordinate between freezing period with the phase of adjustment between plane of scanning motion coordinate between difference and internal's amount of movement corresponding.Therefore, plane of scanning motion coordinate determining unit 109 determine between freezing periods plane of scanning motion coordinate and the phase of adjustment between plane of scanning motion coordinate between difference (change amount) (step S203).To move and rotary scanning plane coordinates system, correct (step S204) thereby carry out with the corresponding amount of difference.Therefore, though when the mutual degree of depth of patient's respiratory depth and initial phase not simultaneously, can correct plane of scanning motion coordinate and volumetric image data coordinate system mutually relatively.
During the correction of Figure 13 is handled, show coordinate adjustment screen 231 shown in Figure 14, so that can make freezing key 232 and adjust key 234 in on-screen options.In addition, in variable edit box 232, can also show amount of movement and the rotation amount relevant with correction.The operator can carry out correction by digital value is input in the edit box 232.
In addition, measure the respiratory capacity of input, repeat to correct in a plurality of respiratory depth by respiration pickup 17, and the relation of definite respiratory capacity and internal's amount of movement.Utilize this method, can be according to correcting automatically because the internal moves the skew that causes from the input of respiration pickup.
Above, freezed to have the volumetric image data benchmark image of particular point and having determined and the corresponding ultrasonic scanning of benchmark image plane.On the contrary, this setting also can be to freeze to have the ultrasound image plane of particular point and carries out image processing is determined and the corresponding benchmark image in ultrasonic scanning plane automatically.Particularly, freeze to show the ultrasonic scanning plane of patient's particular point and in the storage medium of for example cine memory 106 record ultrasonic scanning plane.By using known method for mode matching, extract in the volumetric image data of benchmark image determining unit 111 from be stored in volume data memory element 107 and the corresponding benchmark image of the planar particular point of ultrasonic scanning that freezes.On monitor 114, show the benchmark image that extracts as matching result.In the benchmark image matching treatment, do not need to search for all volumetric image data.Therefore.Only be extracted in the data about the plane of scanning motion one side of seeing in the scanning direction of ultrasonic probe 104 and mate special area.Also amplification can be adjusted so that the particular point on the ultrasonic scanning plane has identical amplification with particular point on the benchmark image.In this manner, extracting benchmark image from the image with particular point can improve and make ultrasonic scanning plane and the aligned degree of accuracy of benchmark image.
In addition, illustrate below in conjunction with Figure 15 and be used to correct another example that the internal who produces owing to patient respiratory moves the device of the coordinate system skew that causes.Situation as shown in figure 13, the operator carries out this correction and handles when checking the benchmark image that manifests and ultrasonoscopy.At first, probe 104 is placed on one's body the patient, so that show perpendicular to because breathing produces the cross section of the direction that the internal moves.Typically to produce the direction that the internal moves be the patient's body axis direction owing to breathing.Be positioned over patient's probe 104 on one's body then and on the direction that the internal moves, move, and manifest the special echotomography photographs of the blood vessel that comprises portal vein for example or superior mesenteric artery.At this moment, because the skew between generation volumetric image data coordinate system and the plane of scanning motion coordinate system occurs in the cross section skew in the body axes direction between ultrasonoscopy and benchmark image.In this case, freeze ultrasonoscopy and benchmark image, carry out cineloop, and the operator specifies the respective combination of benchmark image and ultrasonoscopy.For example, in example shown in Figure 15, because can determine that they are corresponding images clearly manifesting blood vessel on the benchmark image 1 of moment t1 place demonstration and on the ultrasonoscopy 2 of moment t2 place demonstration.Show corresponding benchmark image at position display and the ultrasonoscopy 2 corresponding benchmark images 1 of moment t2 at moment t1 although from then on be appreciated that.At this moment, plane of scanning motion coordinate 1 and the difference (change amount) that is stored between the plane of scanning motion coordinate 2 in the plane of scanning motion coordinate storage unit 110 are corresponding with internal's amount of movement.Therefore, determine the difference between plane of scanning motion coordinate 1 and the plane of scanning motion coordinate 2 and correct that plane of scanning motion coordinate might be corrected because the internal moves the coordinate system that causes is offset.
Claims (10)
1, a kind of ultrasonic diagnostic equipment comprises:
The ultrasonoscopy generator is used for according to the echotomography photographs of rebuilding the plane of scanning motion from the reflection echo signal of ultrasonic probe output;
Storage device is used to store the better volumetric image data of the picture quality than echotomography photographs that is obtained in advance by diagnostic imaging apparatus;
The benchmark image generator is used for extracting the benchmark tomographic image data corresponding with the ultrasonic tomogram photographs from the volumetric image data that is stored in storage device, and rebuilds the benchmark tomographic image;
Control device is used to make benchmark tomographic image and echotomography photographs to be presented at screen; And
Display device is used to show benchmark tomographic image and ultrasound tomographic image,
Wherein, concern according to the position between benchmark tomographic image data and ultrasonic probe and the patient, the benchmark tomographic image data that the benchmark image generator extracts from described volumetric image data with the corresponding part of the scope of checking of echotomography photographs produce described benchmark tomographic image, show in the described benchmark tomographic image that generates the corresponding part of the scope of checking with described echotomography photographs with the amplification identical with the echotomography photographs.
2, ultrasonic diagnostic equipment according to claim 1 wherein, reduces the brightness of checking the benchmark tomographic image outside the scope at the echotomography photographs, carries out demonstration.
3, ultrasonic diagnostic equipment according to claim 1 wherein, shows the acoustic shadow of echotomography photographs on the benchmark tomographic image according to simulated mode.
4, ultrasonic diagnostic equipment according to claim 1 wherein, shows echotomography photographs and benchmark tomographic image according to aligned mode on screen.
5, ultrasonic diagnostic equipment according to claim 1 wherein, shows the composograph of echotomography photographs and benchmark tomographic image on screen.
6, ultrasonic diagnostic equipment according to claim 5, wherein, composograph is the image that the translucent image by stack benchmark tomographic image on the echotomography photographs obtains.
7, ultrasonic diagnostic equipment according to claim 5, wherein, composograph is the difference images between benchmark tomographic image and the echotomography photographs.
8, ultrasonic diagnostic equipment according to claim 1, wherein, the benchmark image generator changes the picture size of benchmark tomographic image according to the translational speed of ultrasonic probe.
9, ultrasonic diagnostic equipment according to claim 1, also comprise 3D body marker determining unit, be used for determining the plane of scanning motion and the position between the target that volumetric image data is provided with relation, so as to make target with respect to the direction of the plane of scanning motion and distance display on screen.
10, ultrasonic diagnostic equipment according to claim 1, wherein, possesses 3D body marker determining unit, the volumetric image data that use is stored in described storage device produces described patient's three-dimensional visible image, the image of the translucent described plane of scanning motion is represented in stack on this three-dimensional visible image, and it is shown in described display device.
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| CN201110429566.2A CN102512209B (en) | 2003-05-08 | 2004-05-10 | Ultrasonic diagnostic equipment |
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| CN2009101686741A Division CN101669831B (en) | 2003-05-08 | 2004-05-10 | Reference image display method |
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| CN101422378A (en) | 2009-05-06 |
| CN101422378B (en) | 2012-07-18 |
| CN1805711A (en) | 2006-07-19 |
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