The Academic Importance of The Academic Importance of

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國立臺灣大學電機資訊學院資訊工程學系國立臺灣大學電機資訊學院資訊工程學系

博士論文博士論文

髖臼元件方向量測髖臼元件方向量測髖臼元件方向量測髖臼元件方向量測 The Orientation of Acetabulum

The Orientation of Acetabulum ––The Definitions The Definitions and Measuring Methods

and Measuring Methods

報告人：廖振焜報告人：廖振焜指導教授：傅楸善指導教授：傅楸善指導教授：傅楸善指導教授：傅楸善

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Introduction

(3)

The Academic Importance of The Academic Importance of

Acetabular Orientation Acetabular Orientations s

Publications in Recent Seven Years 100

60 80 100

20 40 60

0 20

2000 2001 2002 2003 2004 2005 2006

Searching in Medline with keywords of “acetabulum version”, “acetabulum anteversion” “acetabulum retroversion” or “acetabulum orientation”

2000 2001 2002 2003 2004 2005 2006

anteversion , acetabulum retroversion , or acetabulum orientation

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Definitions Definitions Definitions Definitions

• According to Murrey’s report

– Inclination, lateral opening, abduction, p g,

– Anatomical anteversion, true anteversion

Radiographic anteversion planar anteversion – Radiographic anteversion, planar anteversion – Operative anteversion, flexion

– J Bone Joint Surg Br. 1993;75:228–232.

(5)

Inclination, Lateral Opening, Inclination, Lateral Opening,

Abduction

(6)

Anatomical Anteversion, True Anatomical Anteversion, True

Anteversion

(7)

Radiographic Anteversion, Radiographic Anteversion,

Planar Anteversion

(8)

Operative Anteversion Flexion

Operative Anteversion, Flexion

(9)

Radiographic Anteversion Radiographic Anteversion Radiographic Anteversion Radiographic Anteversion

• Easy to measure from plain radiograph

• Radiographic anteversion angle = sinRadiographic anteversion angle sin^-1

(short axis of the ellipse / long axis of the ellipse)

ellipse)

• By Lewinnek, J Bone Joint Surg [Am] ,1978;60-A:217-20.

(10)

α= sin^-1 (short axis of the ellipse / long axis of the ellipse)

(11)

Another Another

Method Method

• Measure the ellipse at 0.4r

• To eliminate the overlapping g

femoral head

• By Pradhan, JBy Pradhan, J Bone Joint Surg [Br], 1999;81-

[Br], 1999;81 B(3):431-5.

(12)

Pradhan’s Method

Pradhan s Method

(13)

Pradhan’s Method Pradhan’s Method Pradhan s Method Pradhan s Method

• α= sin^-1 (0.4D / long axis of the ellipse)

• D: the short axis at 0 4rD: the short axis at 0.4r

(14)

Fabeck’s Fabeck’s

Method Method

• A method to measureA method to measure acetabulum cup

anteversion after total hip replacement Acta hip replacement. Acta Orthop Belg.

1999;65:485–491.

(15)

Fabeck’s method

Fabeck s method

(16)

Widmer’s Method Widmer’s Method Widmer s Method Widmer s Method

• A simplified method to determine acetabular cup anteversion from plain radiographs. p g p

• J Arthroplasty. 2004;19:387–390.

(17)

Widmer’s Method

Widmer s Method

(18)

Widmer’s Method

(19)

Anatomical Anteversion Anatomical Anteversion

(True Anteversion) (True Anteversion)

• Indirect method

– Measure radiographic anteversion, and g p , inclination

– Then calculate anatomical anteversionThen calculate anatomical anteversion – anatomical anteversion = tan^-1(tanα cscγ)

di hi t i

– α: radiographic anteversion – γ: inclination

(20)

Anatomical Anteversion Anatomical Anteversion Anatomical Anteversion Anatomical Anteversion

• Direct method

• McLaren’s methodMcLaren s method

• anatomical anteversion

i ¹( / l )

= sin^-1(s_t / l_t)

(21)

Anatomical Anteversion Anatomical Anteversion

Di t M th d Di t M th d Direct Method Direct Method

• Fabeck’s method

(22)

CT Method

(23)

(24)

The Digitalized Simulator

(25)

The Digitalized Simulator The Digitalized Simulator The Digitalized Simulator The Digitalized Simulator

B f d l i i th d t

• Before developing measuring methods, we must develop the “gold standard”.

M h i l d i i t i htf d b t

• Mechanical device is straightforward but

expensive and having an unpredicted precision.

Th th d i h i l i l t i

• The method using mechanical simulator requires taking radiograph and then transforming to

digital form digital form.

• It takes many processes and every process may cause error thus interferes with the final

cause error thus interferes with the final precision.

(26)

The Mechanical Simulator

(27)

The Digitalized Simulator The Digitalized Simulator The Digitalized Simulator The Digitalized Simulator

• Many published methods used Fourier transformation.

– Speed

Precision?

– Precision?

• Ray tracing

• Transform thickness to grey scale

(28)

Algorithm Algorithm

• Build mathematical model of acetabulum with femoral head.

• Ray tracing every projected pixel on virtual film

film.

– Calculate metal thickness where the X-ray beam passes.

– Transform thickness to grey scale.

– Draw in the virtual film.

(29)

Transforming Thickness to Grey Transforming Thickness to Grey

Scale Scale

• Beer-Lambert law.

– Penetration = e^-kbc

– k: molar absorbability – b: path length

– c: concentration

– k: different in different materials and different radiation energy.

– Radiation energy from X-ray tube: normal distribution

• Lookup table method

(30)

Lookup Table Method Lookup Table Method Lookup Table Method Lookup Table Method

• We propose to implement the Simulator by lookup table method.p

(31)

Lookup Table Method

(32)

The Simulator and the basic figure of the generated radiograph.

(33)

We adjust the wearing parameters, and the result is showed.

(34)

We adjust the film size parameter to simulate a smaller film in the same picture, and the result is shown.

(35)

We choose the anteversion type as radiographic anteversion, and the result is shown.

(36)

(37)

New Protractor of Measuring New Protractor of Measuring New Protractor of Measuring New Protractor of Measuring

Orientations after Total Hip Orientations after Total Hip pp

Arthroplasty

(38)

(39)

Our Method Our Method Our Method Our Method

• α_p = sin^-1tan β_p

(40)

Our Method

(41)

Our Method

(42)

Our Method

(43)

Anatomical Anteversion Anatomical Anteversion

Di t M th d Di t M th d Direct Method Direct Method

• Our method

(44)

Anatomical Anteversion Anatomical Anteversion

Di t M th d Di t M th d Direct Method Direct Method

• Our method

(45)

Proposed Methods Proposed Methods Proposed Methods Proposed Methods

• We simulate 45 total hip arthroplasty

radiographs with 15 different anteversions g p ranging from 15°–29° and random

inclinations using our Simulator inclinations using our Simulator.

• We also collect 45 total hip arthroplasty radiographs.

(46)

Materials and Methods Materials and Methods Materials and Methods Materials and Methods

• Measure the anteversion of the 90 radiographs with Lewinnek method.g p

• Measure the anteversion again one week later with our method

later with our method.

• Compare the difference between the two measurements.

(47)

(48)

(49)

Results Results

F i l t d di h

• For simulated radiographs

• Max error:

Liaw: 3°

– Liaw: 3

– Lewinnek: 2.61°

• Median error:

– Liaw: 1°

– Lewinnek: 1.23°

M

• Mean error:

– Liaw: 0.96°

– Lewinnek: 1.2°

• No statistical difference between the two methods

(50)

Results Results

• For real radiographs

• Difference between our and Lewinnek’sDifference between our and Lewinnek s methods

M f b l t diff 1 34°

– Mean of absolute difference: 1.34°

– Standard deviation of absolute difference:

1.13°

(51)

Discussion Discussion

• Perfect position required to get the real anteversion.

• Pradhan’s data

M 0 88°

– Mean error was 0.88°.

– Standard deviation of error was 0.65°.

(52)

(53)

Th I t f

The Improvement of The Improvement of

Wid ’ P t t Wid ’ P t t

Widmer’s Protractor

(54)

(55)

Widmer’s Method Widmer’s Method Widmer s Method Widmer s Method

• Easy to use, but imprecise.

• Widmer, K.H., A simplified method to

d t i t b l t i

determine acetabular cup anteversion from plain radiographs. J Arthroplasty, 2004. 19(3): p. 387-90.

(56)

Widmer’s Method Widmer’s Method Widmer s Method Widmer s Method

• Anteversion= 48.5*(S/TL)-0.3

(57)

Sources of Imprecision Sources of Imprecision Sources of Imprecision Sources of Imprecision

• Approximate curve with linear regression.

• Ignore different inclination (abduction)Ignore different inclination (abduction) influences on anteversion of oblique projection

projection.

(58)

Proposed Methods Proposed Methods Proposed Methods Proposed Methods

• Improve precision

• Use hip AP view radiographsUse hip AP view radiographs

– Eliminate second source of imprecision.

• Approximate curve with mathematic equation.q

(59)

Mathematical Relationship Mathematical Relationship Mathematical Relationship Mathematical Relationship

TL (l S) / 2

• TL=(l +S) / 2

• TL= S /(S/TL_ratio)

• l= 2 TL- S =2 S / (S/TL_ratio)- S

• S/l = S / (2 S / (S/TL( ( _ratio_ratio)- S)= (S/TL) ) ( _ratio_ratio)/(2-) ( (S/TL_ratio))

• Radiographic version

= sin sin (S / l)^-1(S / l)

= sin^-1((S/TL_ratio)/(2-(S/TL_ratio)))

(60)

(61)

(62)

Proposed Methods Proposed Methods Proposed Methods Proposed Methods

W i l t 336 t t l hi th l t

• We simulate 336 total hip arthroplasty

radiographs with 48 different anteversions

f ° ° ff

ranging from 5°–52° and seven different

inclinations (30°, 35°, 40°, 45°, 50°, 55°, and 60°) using our Simulator.

• Measure the anteversion of the 336 easu e t e a te e s o o t e 336

radiographs with our improved method and with Widmer’s method.

and with Widmer s method.

• Compared with pair t-test.

(63)

Materials and Methods Materials and Methods Materials and Methods Materials and Methods

• We randomly select ten hip arthroplasty

radiographs and measure the radiographic g p g p anteversion with our method and Widmer’s method twice each by one of the authors

method twice each by one of the authors.

(64)

Results

(65)

Results Results

F i l t d di h

• For simulated radiographs

• Max error:

– Ours: 3°

– Widmer’s: 8 7°Widmer s: 8.7

• Mean error:

O 0 8°

– Ours: 0.8

– Widmer’s: 5.2°

• There is statistical difference between the two methods. (p<0.0001)( )

(66)

Results Results

• For real radiographs

• Inter-measurement differenceInter measurement difference

– Absolute difference

O 0° t 1°

• Ours: 0 to 1

• Widmer’s: 0° to 2°

(67)

(68)

Liaw’s Version

Liaw’s Version ––

Liaw s Version Liaw s Version

A New Standardized Version A New Standardized Version

of Acetabular Prosthesis

(69)

(70)

Position Problems Position Problems

• Position will interfere the anteversion we measure.

• Position problems include

X t b iti

– X-ray tube position – Film position

– Patient position

(71)

X Ray Tube Position X Ray Tube Position X Ray Tube Position X Ray Tube Position

• 100 cm above the patient

• Pelvis AP viewPelvis AP view

– Centered at symphysis pubis

• Hip AP view

– Centered at femoral head (acetabulum)( )

(72)

X Ray Film Position X Ray Film Position X Ray Film Position X Ray Film Position

• Pelvis AP view

– Perpendicular to X ray tube to symphysis p y y p y pubis

• Hip AP view

– Perpendicular to X ray tube to femoral head

• Below patient

(73)

Patient Position Patient Position Patient Position Patient Position

N tilt

• No tilt

• No rotation

• Pelvis AP view

Line X ray tube to symphysis pubis is parallel – Line X ray tube to symphysis pubis is parallel

to symphysis pubis to sacrococcygeal junction

• Hip AP view

– Line X ray tube to femoral head is parallel to symphysis pubis to sacrococcygeal junction symphysis pubis to sacrococcygeal junction

(74)

(75)

Position Problem Position Problem Position Problem Position Problem

• To keep X ray tube and film in good position is easy.

p y

• Hard to obtain good position of patient.

(76)

Patient Position Problem Patient Position Problem Patient Position Problem Patient Position Problem

• We can take X ray again and again until we obtain good patient position.g p p

• Jaramaz’s method uses CT (computer tomography) to obtain three dimensional tomography) to obtain three-dimensional relationship and then calculate the

anteversion.

• Clin. Orthop., 354:70–80, 1998.Clin. Orthop., 354:70 80, 1998.

(77)

Our Solution Our Solution Our Solution Our Solution

• Take X ray without concerning patient’s position.

p

• Find clues on this X ray and calculate the patient’s position

patient s position.

• Then correct the anteversion by the patient’s position.

(78)

(79)

Our Definition of Anteversion Our Definition of Anteversion Our Definition of Anteversion Our Definition of Anteversion

P l i di hi i th i f

• Pelvis radiographic axis: the axis from

center of sacrococcygeal junction pointed toward upper pole of symphysis pubis.

– The upper pole of symphysis pubis means the mid point of upper end of interpubic

fibracartilage.

• Radiographic standardized anteversion (Liaw’s version): the angle between the

( ) g

plane of acetabulum and pelvis radiographic axis g p

(80)

(81)

Obtain Patient’s Position Obtain Patient’s Position Obtain Patient s Position Obtain Patient s Position

• Define Cartesian coordinate system

• Obtain pelvis radiographic axis from plainObtain pelvis radiographic axis from plain X ray.

Obt i t f l i di hi i

• Obtain vector of pelvis radiographic axis.

• Obtain normal vector of acetabulum.Obta o a ecto o acetabu u

• Calculate the angle between the two ectors

vectors.

(82)

Cartesian Coordinate System

(83)

Normal Vector of Acetabulum Normal Vector of Acetabulum Normal Vector of Acetabulum Normal Vector of Acetabulum

• Anteversionθ =∠dge

• Inclinationφ = ∠Inclinationφ ∠cgecge

• Unit normal vector n= vector gd

• Vector n=

( i * θ * θ i θ)

( sinφ*cosθ, -cosφ*cosθ, sinθ)

(84)

Vector of Pelvis Radiographic Vector of Pelvis Radiographic

Axis Axis Axis Axis

• h mm: horizontal

di l t f

displacement of

sacrococcygeal junction related to upper pole of related to upper pole of symphysis pubis in

horizontal direction horizontal direction.

• h is positive if

sacrococcygeal junction sacrococcygeal junction is between this

acetabulum and the

upper pole of symphysis pubis, otherwise it is

negative.

(85)

Vector of Pelvis Radiographic Vector of Pelvis Radiographic

Axis Axis Axis

• v mm: vertical

Axis

displacement of displacement of

sacrococcygeal junction related to upper pole of pp p symphysis pubis in

vertical direction.

i iti if

• v is positive if

sacrococcygeal junction is higher than upper pole is higher than upper pole of symphysis pubis,

otherwise it is negative.

• vector a=

(-h, -v, (ssd ²-h²- v²) ^0.5)

ssd: distance from

sacrococcygeal junction to upper pole of symphysis publs

(86)

Angle between the Two Vectors Angle between the Two Vectors Angle between the Two Vectors Angle between the Two Vectors

• ω = angle between the two vectors

• cosω= (vector a dot vector n)/(length ofcosω (vector a dot vector n)/(length of vector a* length of vector n)

1(( t d t t )/(l th f

• ω= cos^-1((vector a dot vector n)/(length of vector a* length of vector n))

(87)

Radiographic Standardized Radiographic Standardized

Anteversion Anteversion

• radiographic standardized anteversion=

90 degrees – ω 90 degrees ω

=90 degrees –

cos^-1((-h* sinφ*cosθ+v*cosφ*cosθ+

sinθ*(ssd ²-h²- v²) ^0.5)/ssd) s θ (ssd ) )/ssd)

= sin^-1((-h* sinφ*cosθ+v*cosφ*cosθ+

sinθ*(ssd ² h² ²) ^{0 5})/ssd) sinθ*(ssd ²-h²- v²) ^0.5)/ssd)

(88)

Material and Methods Material and Methods Material and Methods Material and Methods

• We measure ssd of 109 normal adults from lumbar-saccral lateral view radiographs.

• We collect ten patients who received total hip arthroplasty in En Chu Kong Hospital in 1999. y g

• Inclusion criteria

– Radiographs include the acetabulum symphis pubisRadiographs include the acetabulum, symphis pubis, and sacrococcygeal junction.

• Exclusion criteriaExclusion criteria

– Average radiographic anteversion below 10 degrees

(89)

Material and Methods Material and Methods Material and Methods Material and Methods

• We measure the radiographic anteversion by Lewinnek’s method, and inclination, y , ,

and then radiographic standardized anteversion by our method

anteversion by our method.

(90)

Materials and Methods Materials and Methods Materials and Methods Materials and Methods

• We calculate the standard deviation for all measurement of each patient and RSD p

(Repeatability Standard Deviation) from ASTM E691 for comparison

ASTM E691 for comparison.

• The RSD can be seen as standard deviation.

• The lower RSD, the better.The lower RSD, the better.

(91)

Materials and Methods Materials and Methods Materials and Methods Materials and Methods

f

• X_ij means the result of the jth patient, the ith X- rays’ measurement; means the mean result of

h j h i d h l b f

the jth patient; and n_j means the total number of measurement of the jth patient.

(92)

Results Results

• ssd

– Male: 137 to 190mm, 159 ± 12mm , – Female: 138 to 183mm, 160 ± 12mm

Total: 137 to 190mm 159 ±12mm – Total: 137 to 190mm, 159 ±12mm – No sex difference. (p=0.91)

– Considering magnification factor, we apply the result “ssd=159×0.9=143” to standardize

equation.

(93)

Results Results

Absolute difference Standard deviation

(94)

Results

Patien t

Number of radiogram of each patient

Radiographic Anteversion Standardized Anteversion

Min

* Median Max

* Mean STD^* MAD^* Min

* Median Max* Mean STD^* MAD^*

1 3 6 2 11 3 11 5 9 67 3 02 2 32 15 8 17 0 17 1 16 6 0 73 0 56

1 3 6.2 11.3 11.5 9.67 3.02 2.32 15.8 17.0 17.1 16.6 0.73 0.56

2 6 7.0 12.2 18.2 12.3 3.62 2.40 17.0 18.0 18.4 17.8 0.55 0.43

3 4 0 17.1 17.9 13.0 8.73 6.52 13.7 16.6 17.9 16.2 1.90 1.46

4 10 10.3 13.5 21.0 13.9 3.17 2.30 27.6 30.1 31.5 29.8 1.39 1.14

5 11 12.9 15.3 23.1 16.4 3.43 2.59 21.1 22.4 24.1 22.6 0.99 0.81

6 5 24.9 26.4 32.9 27.6 3.25 2.42 27.6 28.5 28.9 28.3 0.54 0.44

7 8 11.6 13.2 14.8 13.1 1.11 0.89 23.6 24.5 25.6 24.6 0.77 0.65

8 5 10 8 11 4 15 1 12 3 1 73 1 33 17 0 17 4 18 3 17 6 0 56 0 47

8 5 10.8 11.4 15.1 12.3 1.73 1.33 17.0 17.4 18.3 17.6 0.56 0.47

9 8 8.3 12.4 20.9 13.4 3.99 3.09 7.5 8.7 10.2 8.9 1.04 0.89

10 8 9.1 12.7 14.1 12.4 1.48 0.90 14.6 15.2 16.1 15.3 0.50 0.42

*Min: minimal Total:

68

**RSD:

3.50

Average:

2.30

**RSD:

0.99

Average:

0.75 Min: minimal

Max: maximal

STD: standard deviation

MAD: meanof absolute deviation

** RSD: Repeatability Standard Deviation

(95)

Discussion Discussion

• CT standardization method:

– average of absolute deviation: 2.3g ^o – standard deviation: 2.9^o

Li i

• Liaw version:

– average of absolute deviation: 0.75^o – repeatability standard deviation: 0.99^o

(96)

Summary Summary

W id di it l Si l t ld

• We provide a digital Simulator as gold standard for acetabular component

orientation study.

• We invent a new protractor.p

• We improve the precision of Widmer’s protractor

protractor.

• We invent a new two-dimensional

standardi ed ante ersion Lia ersion standardized anteversion, Liaw version, to solve the position problem.

(97)

Conclusion Conclusion

• Some of our studies have been

published in medical and mathematical p

journals (see Appendix E), we hope the future studies can use our inventions

future studies can use our inventions.

(98)

謝謝收看

謝謝收看 !!!!

謝謝收看

(99)

Publications Publications

• [A] Journal Papers

• Liaw CK, Yang RS, Hou SM, et al. A Simple Mathematical Standardized

Measurement of Acetabulum Anteversion after Total Hip Arthroplasty. Computational and Mathematical Methods in Medicine. (in press) (C*J*A 3*.5*5=7.5)

Liaw CK Yang RS Hou SM et al Measurement of the the Acetabular Cup

• Liaw CK, Yang RS, Hou SM, et al. Measurement of the the Acetabular Cup Anteversion on the Simulated Radiographs. J Arthroplasty. (in press). (SCI 9/43 impact 1.806) (C*J*A 3*5*5=75)

• Liaw CK, Fuh CS, Yang RS, Hou SM, Wu TY. The Importance of Knowing

Anteversion Values Before and After Rotational Acetabular Osteotomy (letter) J Anteversion Values Before and After Rotational Acetabular Osteotomy. (letter). J.

Bone Joint Surg. Am. (SCI 3/43 impact 2.444). (C*J*A 2*5*5=50) http://www.ejbjs.org/cgi/eletters/88/9/1915

• Liaw CK, Fuh CS, Yang RS, Hou SM, Wu TY. Use of a Sentinel Pin as a Guide to Acetabular Component Anteversion in Total Hip Arthroplasty (letter) J Bone Joint Acetabular Component Anteversion in Total Hip Arthroplasty. (letter). J. Bone Joint Surg. Am. (SCI 3/43 impact 2.444). (C*J*A 2*5*5=50)

http://www.ejbjs.org/cgi/eletters/88/suppl_4/97

• Liaw CK, Hou SM, Yang RS, et al. A New Tool for Measuring Cup Orientation in Total Hip Arthroplasties from Plain Radiographs. Clin Orthop. 2006;451:134–139. (SCI 6/43 Hip Arthroplasties from Plain Radiographs. Clin Orthop. 2006;451:134 139. (SCI 6/43 impact 2.161) (C*J*A 3*5*5=75)

(100)

Publications Publications

吳岱穎陳建志楊榮森林光洋郭冠良黃惠娟廖振焜

• 吳岱穎, 陳建志, 楊榮森, 林光洋, 郭冠良, 黃惠娟, 廖振焜

: 退化性關節炎的另類治療. Taipei City Medical Journal. 2:9-15, 2005. (C*J*A 3*0.5*5=7.5)

• C. S. Wu, R. S. Yang, J. K. Liaw, S. M. Hou: Calcium Sulfate for the Treatment of Benign Bone Tumors. J.

Orthop Surg. R.O.C. 21:200-206, 2004. (C*J*A p g , ( 3*0.5*1=1.5)

• J. K. Liaw, S. H. Liaw, R. S. Yang, S. M. Hou Reverse drilling technique in inserting distal locking screws of drilling technique in inserting distal locking screws of interlocking nail. J. Orthop Surg. R.O.C. 18:115-119, 2001.

T i KJ Li JK Li CC H SM 2001 Mi i l

• Tsai KJ, Liaw JK, Lin CC, Hou SM, 2001: Minimal

invasive technique in compression hip screw insertion.

J Orthop Surg ROC 18: 130-135, 2001.

(101)

Publications Publications

• [B] Books

• 1 實用骨骼肌肉系統超音波學王崇禮王1. 實用骨骼肌肉系統超音波學. 王崇禮王亭貴陳文翔王廷明王貞棣張志豪廖振

焜侯君翰楊榮森 2006 合記圖書出版社

• 2. 臨床骨折學. 楊榮森蔡文基簡君儒廖

振焜蔡凱宙曾效祖 1998合記圖書出版社

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Publications Publications

• [C] Conference papers

• A Simplified Guide Ruler for Rotational Osteotomy. 廖振焜許祐堡楊南屏游敬孝傅楸善楊榮森王崇禮侯勝茂 2007 骨科醫學會聯合學術研討會

合學術研討會.

• Measurement of the the Acetabular Cup Anteversion on the

Simulated Radiographs. Chen-Kun Liaw Rong-Sen Yang Sheng- Mou Hou Chiou-Shann Fuh Tai-Yin Wu Fifth SICOT/SIROT

Annual International Conference 29 August 2007 Marrakech, Motocco.

• Percutaneous Repair of Neglected Achilles Tendons Rupture以經皮穿刺修補忽視的跟腱斷裂廖振焜戴瀚成吳長晉林大弘楊榮森皮穿刺修補忽視的跟腱斷裂廖振焜戴瀚成吳長晉林大弘楊榮森王崇禮侯勝茂中華民國骨科醫學會96年度春季聯合學術研討會

• Reverse Drilling Technique in Inserting Distal Locking Screws of Interlocking Nail 以＂反轉找洞法＂打骨髓內釘之遠端固定螺絲廖 Interlocking Nail 以反轉找洞法打骨髓內釘之遠端固定螺絲廖振焜 2007創傷骨科高峰論壇廣州.

(103)

Publications Publications

• An Improved Method to Measure Acetabular Cup Anteversion From Plain Radiographs 廖振焜

• An Improved Method to Measure Acetabular Cup Anteversion From Plain Radiographs. 廖振焜林大弘吳長晉戴瀚成傅楸善楊榮森侯勝茂 2006 骨科醫學會聯合學術研討會.

• Simulated Radiograph of Total Hip Arthroplasty for Verifying Measuring Instrument. Chen-Kun Liaw Rong-Sen Yang Sheng-Mou Hou Chiou-Shann Fuh Tai-Yin Wu Fourth SICOT/SIROT Annual International Conference 23-26 August 2006 Buenos Aires, Argentina.

• A New Tool for Measuring Cup Orientation in Total Hip Arthroplasty. Chen-Kun Liaw Rong- Sen Yang Sheng-Mou Hou Chiou-Shann Fuh Tai-Yin Wu Fourth SICOT/SIROT Annual International Conference 23-26 August 2006 Buenos Aires, Argentina.

• Accuracy of Measurement of Acetabulum Anteversion with Radiographs of Total Hip

Replacements. Chen-Kun Liaw Rong-Sen Yang Sheng-Mou Hou Chiou-Shann Fuh Tai-Yin Replacements. Chen Kun Liaw Rong Sen Yang Sheng Mou Hou Chiou Shann Fuh Tai Yin Wu Fourth SICOT/SIROT Annual International Conference 23-26 August 2006 Buenos Aires, Argentina.

• Automatic Digital PE Wear Measurement. Chen-Kun Liaw Rong-Sen Yang Sheng-Mou Hou Chiou-Shann Fuh Tai-Yin Wu Fourth SICOT/SIROT Annual International Conference 23-26 August 2006 Buenos Aires Argentina

August 2006 Buenos Aires, Argentina.

• A New Tool for Measuring Cup Orientation in Total Hip Arthroplasty 廖振焜傅楸善楊榮森侯勝茂 2006 中華骨科學術交流會議

• OCM Approach for Hip Arthroplasty-En Chu Kong Experience廖振焜侯勝茂中華民國骨科醫學會95年度春季聯合學術研討會

• Automatic Digital PE Wear Measurement. 廖振焜林大弘吳長晉戴瀚成傅楸善楊榮森侯勝茂 2005 骨科醫學會聯合學術研討會.

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Publications Publications

• Simulated Radiograph of Total Hip Arthroplasty for Verifying

Measuring Instrument. 廖振焜林大弘吳長晉戴瀚成傅楸善楊榮森侯勝茂 2005 骨科醫學會聯合學術研討會.

• Accuracy of Measurement of Acetabulum Anteversion withAccuracy of Measurement of Acetabulum Anteversion with

Radiographs of Total Hip Replacements 廖振焜林大弘吳長晉戴瀚成傅楸善楊榮森侯勝茂 2005 骨科醫學會聯合學術研討會.

• Automatic Digital PE Wear Measurement. Chen-Kun Liaw, Tai-g , Yin Wu, Sheng-Mou Hou, Rong-Sen Yang, Chiou-Shann Fuh, Shong-Hon Liao, Chang-Chin Wu, Han-Cheng Tai, Dah-Hsiang Liu. 2005 AAOS annual meeting Scientific Exhibition.

A N T l f M i C O i t ti i MIS T t l Hi

• A New Tool for Measuring Cup Orientation in MIS Total Hip Arthroplasty Chen-Kun Liaw, Sheng-Mou Hou. 4th annual

scientific symposium Orthopaedic Update: MIS Surgery Series, 2005 Gold Coast

2005, Gold Coast.

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Publications Publications

• Templater: Solution for Preoperative Planning on Picture Archiving and

Communication Systems (PACS) 廖振焜吳長晉劉大祥戴瀚成傅楸善楊榮森侯勝茂 2004 骨科醫學會聯合學術研討會.

• Recent advances on diagnosis of femoral head avascular necrosis股骨頭部缺血性

壞死診斷的最新進展廖振焜侯勝茂施庭芳 2004第四屆華裔骨科醫學會專題演講

中國北京.

• Small Incision Hip Arthroplasty廖振焜侯勝茂2002 骨科醫學會聯合學術研討會.

• A New Tool for Measuring The Orientation of the Total Hip Arthroplasty 廖振焜侯勝茂楊榮森 2002 骨科醫學會聯合學術研討會

勝茂楊榮森 2002 骨科醫學會聯合學術研討會.

• Reverse Drilling Technique in Inserting Distal Locking Screws of Interlocking Nail

以＂反轉找洞法＂打骨髓內釘之遠端固定螺絲廖振焜廖祥宏楊榮森侯勝茂 2001

骨科醫學會聯合學術研討會.

• 病人資料管理系統廖振焜侯勝茂 2001 骨科醫學會聯合學術研討會

• 病人資料管理系統廖振焜侯勝茂 2001 骨科醫學會聯合學術研討會.

• The Limited Anterior Approach for Operative Treatment of Humeral Supracondyle Fracture廖振焜釋高上王廷明王至弘 2000 骨科醫學會聯合學術研討會.

• Subscapularis transposition in repairing massive Rotator Cuff tear廖振焜周宏法陳澄男劉文俊 1996 骨科醫學會聯合學術研討會

陳澄男劉文俊 1996 骨科醫學會聯合學術研討會.

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Publications Publications

• [D] 專利專利

• 髖臼方向量尺廖振焜楊榮森侯勝茂髖臼方向量尺廖振焜楊榮森侯勝茂 2005 台灣專利: 第228409 號.