| dc.contributor |
Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA |
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| dc.contributor |
Division of Gynecology, Department of Obstetrics and Gynecology, University of Michigan Medical School, Ann Arbor, Michigan, USA |
|
| dc.creator |
Chen, L. |
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| dc.creator |
Hsu, Y. |
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| dc.creator |
Ashton‐miller, J.a. |
|
| dc.creator |
DeLancey, J.O.L. |
|
| dc.date |
2017-01-10T19:02:56Z |
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| dc.date |
2017-01-10T19:02:56Z |
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| dc.date |
2006-03 |
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| dc.date.accessioned |
2022-05-19T10:35:06Z |
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| dc.date.available |
2022-05-19T10:35:06Z |
|
| dc.identifier |
Chen, L.; Hsu, Y.; Ashton‐miller, J.a. ; DeLancey, J.O.L. (2006). "Measurement of the pubic portion of the levator ani muscle in women with unilateral defects in 3â D models from MR images." International Journal of Gynecology & Obstetrics 92(3): 234-241. |
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| dc.identifier |
0020-7292 |
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| dc.identifier |
1879-3479 |
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| dc.identifier |
https://hdl.handle.net/2027.42/135155 |
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| dc.identifier |
10.1016/j.ijgo.2005.12.001 |
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| dc.identifier |
International Journal of Gynecology & Obstetrics |
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| dc.identifier |
Bump R.C., Mattiasson A., Bo K., Brubaker L.P., DeLancey J.O., Klarskov P., et al. The standardization of terminology of female pelvic organ prolapse and pelvic floor dysfunction. Am J Obstet Gynecol. 175 (1): 1996; 10 â 17 |
|
| dc.identifier |
Olsen A.L., Smith V.J., Bergstrom J.O., Colling J.C., Clark A.L. Epidemiology of surgically managed pelvic organ prolapse and urinary incontinence. Obstet Gynecol. 89: 1997; 501 â 506 |
|
| dc.identifier |
Boreham M.K., Wai C.Y., Miller R.T., Schaffer J.L., Word R.A. Morphometric analysis of smooth muscle in the anterior vaginal wall of women with pelvic organ prolapse. Am J Obstet Gynecol. 187: 2002; 56 â 63 |
|
| dc.identifier |
Boreham M.K., Wai C.Y., Miller R.T., Schaffer J.L., Word R.A. Morphometric properties of the posterior vaginal wall in women with pelvic organ prolapse. Am J Obstet Gynecol. 187: 2002; 1501 â 1509 |
|
| dc.identifier |
Takano C.C., Girao M.J., Sartori M.G., Castro R.A., Arruda R.M., Simoes M.J., et al. Analysis of collagen in parametrium and vaginal apex of women with and without uterine prolapse. Int Urogynecol J. 13 (6): 2002; 342 â 345 |
|
| dc.identifier |
Smith A.R.D., Hosker G.L., Warrell D.W. The role of partial denervation of the pelvic floor in the etiology of genitourinary prolapse and stress incontinence of urine: a neurophysiologic study. Br J Obstet Gynaecol. 96: 1989; 24 â 28 |
|
| dc.identifier |
DeLancey J.O., Kearney R., Chou Q., Speights S., Binno S. The appearance of levator ani muscle abnormalities in magnetic resonance images after vaginal delivery. Obstet Gynecol. 101 (1): 2003; 46 â 53 |
|
| dc.identifier |
Kirschnerâ Hermanns R., Wein B., Niehaus S., Schaefer W., Jakse G. The contribution of magnetic resonance imaging of the pelvic floor to the understanding of urinary incontinence. Br J Urol. 72: 1993; 715 â 718 |
|
| dc.identifier |
Tunn R., Paris S., Fischer W., Hamm B., Kuchinke J. Static magnetic resonance imaging of the pelvic floor muscle morphology in women with stress urinary incontinence. Neurourol Urodyn. 17 (6): 1998; 579 â 589 |
|
| dc.identifier |
Singh K., Jakab M., Reid W.M., Berger L.A., Hoyte L. Threeâ dimensional magnetic resonance imaging assessment of levator ani morphologic features in different grades of prolapse. Am J Obstet Gynecol. 188 (4): 2003; 910 â 915 |
|
| dc.identifier |
Ikai M., Fukunaga T. Calculation of muscle strength per unit crossâ sectional area of human muscle by means of ultrasonic measurement. Int Z Angew Physiol Einschl Arbeitsphysiol. 26 (1): 1968; 26 â 32 |
|
| dc.identifier |
Ikai M., Fukunaga T. A study on training effect on strength per unit crossâ sectional area of muscle by means of ultrasonic measurement. Int Z Angew Physiol Einschl Arbeitsphysiol. 28 (3): 1970; 173 â 180 |
|
| dc.identifier |
Lawson J.O. Pelvic anatomy: I. Pelvic floor muscles. Ann R Coll Surg Engl. 54: 1974; 244 â 252 |
|
| dc.identifier |
Kearney R., Sawhney R., DeLancey J.O. Levator ani muscle anatomy evaluated by originâ insertion pairs. Obstet Gynecol. 104 (1): 2004; 168 â 173 |
|
| dc.identifier |
Singh K., Reid W.M., Berger L.A. Magnetic resonance imaging of normal levator ani anatomy and function. Obstet Gynecol. 99 (3): 2002; 433 â 438 |
|
| dc.identifier |
Strohbehn K., Ellis J.H., Strohbehn J.A., DeLancey J.O.L. Magnetic resonance imaging of levator ani with anatomic correlation. Obstet Gynecol. 87 (2): 1996; 277 â 285 |
|
| dc.identifier |
Janda S., van der Helm F.C., de Blok S.B. Measuring morphological parameters of the pelvic floor for finite element modelling purposes. J Biomech. 36 (6): 2003; 749 â 757 |
|
| dc.identifier |
Bernstein I.T. The pelvic floor muscles: muscle thickness in healthy and urinaryâ incontinent women measured by perineal ultrasonography with reference to the effect of pelvic floor training. Estrogen receptor studies. Neurourol Urodyn. 16 (4): 1997; 237 â 275 |
|
| dc.identifier |
Aukee P., Usenius J.P., Kirkinen P. An evaluation of pelvic floor anatomy and function by MRI. Eur J Obstet Gynecol Reprod Biol. 112 (1): 2004; 84 â 88 |
|
| dc.identifier |
Hoyte L., Schierlitz L., Zou K., Flesh G., Fielding J.R. Twoâ and 3â dimensional MRI comparison of levator ani structure, volume, and integrity in women with stress incontinence and prolapse. Am J Obstet Gynecol. 185 (1): 2001; 11 â 19 |
|
| dc.identifier |
Hoyte L., Ratiu P. Linear measurements in 2â dimentional pelvic floor imaging: the impact of slice tilt angles on measurement reproducibility. Am J Obstet Gynecol. 185: 2001; 537 â 544 |
|
| dc.identifier.uri |
http://localhost:8080/xmlui/handle/CUHPOERS/100308 |
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| dc.description |
ObjectiveDevelop a method to quantify the crossâ sectional area of the pubic portion of the levator ani muscle, validate the method in women with unilateral muscle defects, and report preliminary findings in those women.MethodMultiâ planar proton density magnetic resonance images of 12 women with a unilateral defect in the pubic portion of their levator ani were selected from a larger study of levator ani muscle anatomy in women with and without genital prolapse. Threeâ dimensional bilateral models of the levator ani were reconstructed (using 3â D Slicer, version 2.1b1) and divided into iliococcygeal and pubic portions. Muscle crossâ sectional areas were calculated at four equally spaced locations perpendicular to a line drawn from the pubic origin to the visceral insertion using the Iâ DEAS® computer modeling software.ResultsThe crossâ sectional area of the muscle on the side with the defect was smaller than the normal side at all the four locations. The average bilateral difference was up to 81% at location 1 (nearest pubic origin). Almost all of the volume difference (13.7%, P = 0.0004) was attributable to a reduction in the pubic portion (24.6%, P < 0.0001), not the iliococcygeal portion (P = 0.64), of the muscle.ConclusionsA method was developed to quantify crossâ sectional area of the pubic portion of the levator ani perpendicular to the intact muscle direction. Significant bilateral crossâ sectional area differences were found between intact and defective muscles in women with a unilateral defect. |
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| dc.description |
Peer Reviewed |
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| dc.description |
http://deepblue.lib.umich.edu/bitstream/2027.42/135155/1/ijgo234.pdf |
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| dc.format |
application/pdf |
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| dc.publisher |
Wiley Periodicals, Inc. |
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| dc.rights |
IndexNoFollow |
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| dc.subject |
Crossâ sectional area |
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| dc.subject |
MR image |
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| dc.subject |
3â D reconstruction |
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| dc.subject |
Injury |
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| dc.subject |
Muscle |
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| dc.subject |
Levator ani |
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| dc.subject |
Obstetrics and Gynecology |
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| dc.subject |
Health Sciences |
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| dc.title |
Measurement of the pubic portion of the levator ani muscle in women with unilateral defects in 3â D models from MR images |
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| dc.type |
Article |
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