CN101579240B - Measuring method of acetabular bones of human bodies - Google Patents
Measuring method of acetabular bones of human bodies Download PDFInfo
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Abstract
The invention provides a measuring method of acetabular bones of human bodies, which not only realizes anthropometry through CT scanning and imaging technology, but also standardizes the measured dataof the acetabular bones with the diameter d of acetabulum as the basis of unit standardization. The acetabular bones of human bodies probably differ in sizes but the basic proportion of the acetabula r bones is consistent, therefore, the method applies the point and standardizes the measured data of the acetabular bones with the diameter d of acetabulum as the basis of unit standardization, thereby eliminating comparison difficulty caused by size difference of each bone and providing convenience for comparison and analysis between acetabular bones.
Description
Technical field
The present invention relates to a kind of measuring method of human body acetabular bone skeleton, particularly a kind of acetabular bone osteometry method based on CT scan imaging technique and standardized data processing method.
Background technology
The acetabular bone bone is the most complicated, the most inenarrable part of structure in the skeleton.All the year round,, and, always be the difficult problem of the relevant academia of puzzlement based on the comparative analysis of measurement result for the accurate measurement and the description of acetabular bone skeleton.And this difficulty has also had a strong impact on design and many subject development such as production and human engineering research of relevant with it acetabular bone bone surgery, acetabular bone skeleton coupling inside-fixture and prosthese.Therefore, the measuring method research for human body acetabular bone skeleton is very necessary.
The research of acetabular bone skeleton is to be difficult to its irregular curved-surface structure describe with general language or mathematical equation once big difficult point.Now, the irregular curved surface mode of describing the most accurately that people adopted is that a cloud is described, and promptly through the gauge point match formation and the approaching curved surface of original surface of exhibiting high surface, this is called reverse-engineering again on engineering.And obtain the method for these gauge points, become the curved surface of the final institute of commit point cloud match and the deciding factor of acetabular bone bone similarity.At present, still there is not the method that the document record obtains bone surface point cloud.
In addition, also not only be also to be the acquisition of bone surface curved surface data for the measurement difficult point of human body acetabular bone skeleton for the comparative analysis between the acetabular bone skeleton that obtains measurement data.Obtain the acetabular bone bone surface through above various measuring method and describe, can obtain the concrete locus of each point of bone surface.But, because the size of each skeleton itself is different, want between different skeletons, its shape to be compared research according to above data, still there is certain difficulty.
Summary of the invention
Goal of the invention of the present invention is to solve the problem that exists in the existing acetabular bone osteometry; A kind of acetabular bone osteometry method based on CT scan imaging technique and standardized data processing method is provided; Make its measuring process more convenient, accurate, and its measurement result is more conducive to the shape and structure of skeleton is compared analysis.
Goal of the invention of the present invention is achieved through following technical proposals:
Measuring method of acetabular bones of human bodies is characterized in that: comprise the steps:
(1) through the CT scan instrument human body acetabular bone bone to be measured is scanned, and set up the 3-D view of acetabular bone bone;
(2) in the 3-D view of CT scan, choose anterior inferior iliac spine summit, ischium ridge summit, ischial spine summit as three standard points by manual work;
(3) with settle the standard plane and set up three-dimensional system of coordinate of above-mentioned three selected standard points;
(4) measure the acetabular bone diameter d through the CT 3-D view; With the foundation of this acetabular bone diameter d as unit normalized, with some five equilibrium d/n of this diameter d as the metric unit of three-dimensional system of coordinate;
(5) be that the rounded coordinate point of unit is a measurement point with said d/n on the selection standard plane, measure the height value of the acetabular bone bone outer surface on each measurement point;
(6) arrange a formation point cloud with the measured three-dimensional coordinate point of each measurement point, and form acetabular bone skeleton outer surface curved surface through this cloud match.
In the said step (3); As initial point, the line on anterior inferior iliac spine summit and ischial spine summit is as the X axle with said ischial spine summit, and the X axle vertical line of on this standard flat, crossing initial point is as the Y axle; The vertical line of crossing initial point and this standard flat is set up three-dimensional system of coordinate as the Z axle.
In the said step (4) with d/10 as the metric unit of three-dimensional system of coordinate.
The invention has the beneficial effects as follows:
1, the present invention measures the acetabular bone skeleton through adopting the CT scan method for imaging, and making becomes possibility through the live body detection, reduces the cost of acetabular bone osteometry with this, enlarges the scale of measuring statistics.
2, the present invention is the foundation of unit normalized through the acetabular bone diameter d; Data to the acetabular bone osteometry are carried out standardization; Eliminated the difference in size of skeleton itself, conveniently carried out the statistical analysis and the data mining of data between Different Individual, to find Different Individual bone surface rule in shape.
Description of drawings
Fig. 1 is the flow chart of human body acetabular bone osteometry method;
Fig. 2 is an acetabular bone Bone CT scanning three-dimensional image;
Fig. 3 is an acetabular bone osteometry procedure chart one;
Fig. 4 is an acetabular bone osteometry procedure chart two;
Fig. 5 is acetabular bone skeleton outer surface surface chart after the match.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Can know by aforementioned background art,, need a large amount of adult dry pelvis BIAO and BEN, and in measuring process, exist the possibility of Errors Catastrophic for measurement in the prior art to the measurement Research of acetabular bone skeleton.This method has limited the scale of human body acetabular bone skeleton being measured statistics.Based on this problem, the present invention designs and adopts the CT scan method for imaging that the acetabular bone skeleton is measured, and making becomes possibility through the live body detection, reduces the cost of acetabular bone osteometry with this, enlarges the scale of measuring statistics.
Adopting the CT scan imaging to measure is through the CT scan instrument actual object to be scanned, and sets up the 3-D view of this object, through PaintShop the 3-D view of being set up is carried out a kind of reverse-engineering of Treatment Analysis again.For the accuracy of this measuring method, there have been many scholars both domestic and external to carry out the research of this respect.Wherein discover distance between the dissection radial line of actual BIAO and BEN and surface point measured and in PaintShop, measure contrast with the resultant 3-D view of CT scan and find that both gaps do not have significant difference for one.In addition, also have document that sheep embryo's actual measurement has also been drawn The above results in the contrast of CT three-dimensional rebuilding measuring.Based on these existing research, we have reason to believe that utilizing the CT scan imaging technique to carry out live body measurement data that osteometry obtains is accurately.This also is the basis that the present invention is achieved.
Referring to Fig. 1, the CT scan imaging technique that utilizes that the present invention designed carries out the method for human body acetabular bone osteometry, specifically comprises the steps:
(1) through the CT scan instrument human body acetabular bone bone to be measured is scanned, and set up the 3-D view of acetabular bone bone;
Because the CT scan instrument has been a kind of detecting instrument commonly used in the modern medicine, its scanning imaging technology has been technology known in those skilled in the art, just no longer its scan imaging method is done concrete description here.
(2) in the 3-D view of CT scan, choose anterior inferior iliac spine summit, ischium ridge summit, ischial spine summit as three standard points by manual work;
In order to reduce the error on the later stage osteometry as far as possible, therefore must select to be convenient to the index point of accurate identification at the point hours of selecting to set up three-dimensional system of coordinate.And thinking that medically the acetabular bone peripheral process is from bone surface on the acetabular bone skeleton, and the main anatomic landmark point that can be easy to recognize has the anterior superior iliac spine summit, the anterior inferior iliac spine summit, and ischial tuberosity, the ischial spine summit, and be positioned at the ischium ridge summit on the ischial tuberosity.Therefore, the selected standard point in order to set up three-dimensional system of coordinate must be selected in above-mentioned anatomic landmark point among the present invention.We find and through screening; If choose anterior inferior iliac spine summit, ischium ridge summit, these three anatomic landmark points of ischial spine summit are set up three-dimensional system of coordinate can make acetabular bone bone outer surface to be measured all in a side of three-dimensional system of coordinate, be more convenient for measuring statistical analysis with data.Therefore, we choose these three points as standard point.
(3) with settle the standard plane and set up three-dimensional system of coordinate of above-mentioned three selected standard points;
Among the present invention; The concrete method for building up of this three-dimensional system of coordinate is as initial point with the ischial spine summit; The line on anterior inferior iliac spine summit and ischial spine summit is as the X axle; The X axle vertical line of on this standard flat, crossing initial point is as the Y axle, and the vertical line of crossing initial point and this standard flat is set up three-dimensional system of coordinate as the Z axle.
(4) measure the acetabular bone diameter d through the CT 3-D view; With the foundation of this acetabular bone diameter d as unit normalized, with some five equilibrium d/n of this diameter d as the metric unit of three-dimensional system of coordinate;
Concrete employing is that d/10 is a unit in the present embodiment, and three-dimensional system of coordinate carry out unitization.
(5) be that (to be coordinate points (a, b), a, b are integer) be measurement point, measures the height value of the acetabular bone bone outer surface on each measurement point for the rounded coordinate point of unit with above-mentioned d/n on the selection standard plane;
(6) arrange a formation point cloud with the measured three-dimensional coordinate point of each measurement point, and form acetabular bone skeleton outer surface curved surface through this cloud match.
The measurement of carrying out human body acetabular bone skeleton through above-mentioned steps not only relies on the CT scan imaging technique to realize somatometry, measures cost and has enlarged the measurement scale thereby greatly reduce.The more important thing is that this measuring method also is the foundation of unit normalized through the acetabular bone diameter d, and the data of acetabular bone osteometry are carried out standardization.
As previously mentioned, the difference in size between different acetabular bone skeleton individualities is to influence the principal element that it is furtherd investigate in the research of acetabular bone skeleton.Researcher is difficult between two acetabular bone skeletons that vary in size and does accurate comparative study.But though medical science it is generally acknowledged that possibly there is gap in the acetabular bone bone size of human body at present, its basic ratio is consistent.The present invention has utilized this point just, is that the foundation of unit normalized is carried out standardization with the data of acetabular bone osteometry with the acetabular bone diameter d.Can eliminate the caused relatively difficulty of each skeleton size gap like this, for the comparative analysis of carrying out between the acetabular bone skeleton is provided convenience.And why we can choose the foundation of acetabular bone diameter as unit normalized, mainly are because the architectural feature of acetabular bone own is outstanding, are easy to carry out identification and measurement accurately.Simultaneously, the global shape of acetabular bone own is rounded, so the size of its diameter also relatively is convenient to measure.Choose like this, help improving the certainty of measurement of this method.
Fig. 2 to Fig. 5 is an example, and measuring process of the present invention is described further.At first, human body acetabular bone bone to be measured is scanned, obtain the 3-D view of acetabular bone bone through the CT scan instrument, as shown in Figure 2.In 3-D view shown in Figure 2, choose anterior inferior iliac spine summit, ischium ridge summit, ischial spine summit as three standard points, set up three-dimensional system of coordinate, and measure the acetabular bone diameter d.Then, like Fig. 3, shown in Figure 4, be that unit confirms each measurement point on fixed X-Y plane with d/10, and measure the Z axle value of the acetabular bone bone outer surface on each measurement point.At last, as shown in Figure 5, carry out statistical analysis with the z value that each measurement point is measured, match forms acetabular bone skeleton outer surface curved surface.
The measuring method of the human body acetabular bone skeleton that the invention described above designed, its main feature is based on the CT scan imaging technique, to the acetabular bone osteometry a kind of standardized measuring method is provided.Application for this its a kind of reality of acetabular bone osteometry method is that great amount of samples is measured according to this method; The Z axis values measured with each measurement point carries out statistical analysis; Obtain the regularity of distribution of the corresponding Z axis values of each measurement point, promptly obtain bone surface form law to be measured.Further calculate the mean of the corresponding Z value of measurement point, can obtain detected part bone surface point cloud coordinate set, and form skeleton outer surface curved surface, thereby set up above-mentioned sample pairing overall (like surface behind compatriots' acetabular bone) data base through this cloud match.On this basis, can carry out the research of surface anatomy characteristic, design of inside-fixture and prosthese or the like.Because putting the cloud coordinate set is that unit is described by d/n; Therefore; Different big or small bone surface forms in the different interval correspondence database of d value for a certain individuality, only need on common X sheet, to measure the acetabular bone diameter d; Bring the data base who sets up through said method into and can obtain surface anatomy form behind its acetabular bone, and carry out clinical research and application.It is thus clear that this measuring method of acetabular bones of human bodies that the present invention designed has huge practical significance for clinical research with using.
Certainly, above-mentionedly lift a kind of practical application that example only is the measuring method of acetabular bones of human bodies that the present invention designed.In actual mechanical process, every creation spirit according to the present invention adopts the CT scan technology to set up 3-D view, and through the standardized data processing method skeleton data is carried out standardized measuring method, all should be regarded as within protection scope of the present invention.
Claims (2)
1. measuring method of acetabular bones of human bodies is characterized in that: comprise the steps:
(1) through the CT scan instrument human body acetabular bone bone to be measured is scanned, and set up the 3-D view of acetabular bone bone;
(2) in the 3-D view of CT scan, choose anterior inferior iliac spine summit, ischium ridge summit, ischial spine summit as three standard points by manual work;
(3) with above-mentioned three selected standard points plane that settles the standard; With said ischial spine summit as initial point; The line on anterior inferior iliac spine summit and ischial spine summit is as the X axle; The X axle vertical line of on this standard flat, crossing initial point is as the Y axle, and the vertical line of crossing initial point and this standard flat is set up three-dimensional system of coordinate as the Z axle;
(4) measure the acetabular bone diameter d through the CT 3-D view; With the foundation of this acetabular bone diameter d as unit normalized, with some five equilibrium d/n of this diameter d as the metric unit of three-dimensional system of coordinate;
(5) be that the rounded coordinate point of unit is a measurement point with said d/n on the selection standard plane, measure the Z axle value of the acetabular bone bone outer surface on each measurement point;
(6) arrange a formation point cloud with the measured three-dimensional coordinate point of each measurement point, and form acetabular bone skeleton outer surface curved surface through this cloud match.
2. acetabular bone osteometry method as claimed in claim 1 is characterized in that: in the said step (4) with d/10 as the metric unit of three-dimensional system of coordinate.
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| CN102258382B (en) * | 2011-05-09 | 2013-02-13 | 中国人民解放军第三军医大学第一附属医院 | Method for measuring midst load bearing arc angle of hip joint |
| CN102204829B (en) * | 2011-05-09 | 2013-03-20 | 中国人民解放军第三军医大学第一附属医院 | Method for measuring central bearing diameter of hip joint |
| CN102314712B (en) * | 2011-09-23 | 2013-11-06 | 暨南大学 | Pelvis modeling and pelvis parameter measurement method based on three-dimensional imaging technology |
| CN106175905B (en) * | 2016-08-10 | 2019-02-15 | 唐佩福 | A kind of dissection locking guiding steel plate for Complex Acetabular |
| CN110132101B (en) * | 2019-06-05 | 2020-10-02 | 常州市中医医院 | Femoral head diameter measuring device |
| CN110522515B (en) * | 2019-09-04 | 2021-09-24 | 上海电气集团股份有限公司 | Method and system for determining coverage rate of acetabular prosthesis, electronic device and storage medium |
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| CN1780594A (en) * | 2002-11-07 | 2006-05-31 | 康复米斯公司 | Methods for determining meniscal size and shape and for devising treatment |
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