Ultrafast MR Imaging of the Pelvic Floor

Unterweger, M; Marinček, Borut; Gottstein-Aalame, Nadine M.; Debatin, Jörg F.; Seifert, Burkhardt; Ochsenbein-Imhof, N; Perucchini, Daniele; Kubik‐Huch, Rahel A.

doi:10.2214/ajr.176.4.1760959

Cited by 43 publications

(15 citation statements)

References 14 publications

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“…Current pelvimetry and prediction are principally based on two-dimensional images [1,3,10,11]. Stefan Sporri et al assessed the clinical value of MRI for diagnosing cephalo-pelvic disproportion and for dystocia prognosis in patient with risk.…”

Section: Discussionmentioning

confidence: 99%

“…(Grant No: 10372065, 10672014) tomography, pelvirography, pelvioscopy or external examine. Recently, some researchers have paid attention to MRI-based pelvimetry [1][2][3]. Previous measurements, however, can only provide the information on the shapes of these bony or soft tissues, and can not evaluate the functions of these structures during the obstetric delivery process.…”

Section: Introductionmentioning

confidence: 99%

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Reconstruction of Three-dimensional Model of Normal Female Pelvic Cavity Based on Magnetic Resonance Imaging

Jin

et al. 2007

2007 IEEE/ICME International Conference on Complex Medical Engineering

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Obstetric prognosis is important to both maternal and fetal health. An accurate three-dimensional pelvic model is necessary for offering an advisable suggestion or making a correct decision before operations. Although several models have already been created for the purpose of demonstrating the anatomic structure and measuring the volume of pelvic floor muscles, none of these models includes all the structures needed for biomechanical analysis with finite element method (FEM). The primary goal of this project is to reconstruct a comprehensive magnetic resonance imaging (MRI) -based three-dimensional pelvic model, including both bony (ilium, ischium, fifth lumbar, pubis, sacrum, coccyx, part of femurs) and soft tissues (uterus, rectum, bladder). Firstly, T2-weighted MRI images were acquired, and were segmented semi-automatically. Then, three-dimensional models of each organ and structure were constructed separately and integrated into one model. After that, the whole model was smoothed, while the crucial vertices and sharp edges were kept. Finally, three-dimensional pelvimetry was implemented on the constructed model. The constructed model and measured parameters will be used for future biomechanical simulation of delivery process.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reconstruction of Three-dimensional Model of Normal Female Pelvic Cavity Based on Magnetic Resonance Imaging

Jin

et al. 2007

2007 IEEE/ICME International Conference on Complex Medical Engineering

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“…To assess the diagnostic accuracy, each radiologist compared the final MR imaging diagnoses with regard to pelvic floor weakness that were obtained with the routine pulse sequence at 1.5 T and the new sequence at 3.0 T (independent analysis by each reviewer) using the regular MR imaging criteria for analysis of the pelvic floor [1,3,[18][19][20][21][22][23][24]. If the clinical tests suggested pelvic floor weakness and 1.5-T MRI failed to confirm this, the results of the clinical tests were taken as gold standard.…”

Section: Image Analysismentioning

confidence: 99%

Dynamic pelvic floor MR imaging at 3 T in patients with clinical signs of urinary incontinence-preliminary results

et al. 2008

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To prospectively evaluate feasibility, image quality and diagnostic accuracy of dynamic MR imaging the pelvic floor at 3.0 T in patients with urinary incontinence and to compare these results with those of MRI performed at 1.5 T. Ten patients with the diagnosis of urinary incontinence (clinical symptoms, clinical examination, pelvic ultrasound) were examined with a dynamic balanced FFE (B-FFE) sequence at 1.5 T and 3.0 T on the same day in a randomized order. Spatial (1.5 x 1.5 x 8 mm) and temporal (0.44 s) resolution at 3.0 T were comparable to the 1.5-T B-FFE sequence. Two radiologists assessed visual signal to noise (three-point scale), artefact level (five-point scale) and final MR diagnoses with regard to pelvic floor weakness (independent analysis). The diagnoses obtained at 1.5-T field strength and the results of the clinical tests served as standard of reference. In addition, ROI-based quantitative measurements were performed to assess different tissue contrasts at both field strengths. Data were analyzed for statistical differences by using the Wilcoxon's matched pairs test and the marginal homogeneity test. Visual signal to noise was rated higher at 3.0 T for all ten studies by both radiologists. With regard to artefact level, there was no statistically significant difference between the studies obtained at 3.0 T as compared to the corresponding 1.5-T studies (marginal homogeneity test: p = 0.18 for reviewer 1 and 0.41 for reviewer 2). Mean artefact level was rated minor to moderate by both reviewers for both field strengths (excellent interobserver agreement with Kendall-W value of 0.973). Except for a higher tissue contrast between fat and urethra at 1.5 T, there were no statistically significant differences between tissue contrast at 1.5 T as compared to 3.0 T (Wilcoxon's test). Final MR diagnoses regarding pelvic floor weakness did not differ between 3.0-T and 1.5-T field strength and correlated well with the results of the clinical tests. Dynamic pelvic floor MR imaging is feasible at 3.0 T. Our preliminary data indicate that evaluation of pelvic floor disease seems to be possible with 3.0 T equally well as compared to 1.5 T.

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“…Ist die "Hängematte" lateral abgerissen, dann ist dieser Kontinenzfaktor geschwächt. Kräftigung des Beckenbodens mit Physiotherapie kann das Widerlager muskulär stabilisieren helfen, vor allem wenn der Beckenboden bei abdominaler Belastung reflexartig aktiviert wird [4,16].…”

Section: Schädigung Des Halteapparatsunclassified

Struktur und Funktion des vorderen Beckenbodenkompartiments der Frau

Perucchini

2001

coloproctology

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ZusammenfassungHintergrund: Harninkontinenz und Senkungszustände sind weit verbreitete stille Leiden, welche mit der zunehmenden Überalterung der Bevölkerung häufiger diagnostiziert werden.Pathophysiologie: Das vordere Kompartiment des Beckenbodens spielt einerseits eine wichtige Rolle im Verschluss des knöchernen Beckens im ventralen Bereich; Läsio-nen manifestieren sich als Urethrozelen oder Zystozelen. Andererseits gewährleisten die Harnröhre und die Strukturen des vorderen Kompartiments die Harnkontinenz. Dabei können Inkontinenz und Senkungszustände unabhängig voneinander auftreten.Ätiologie: Durch Geburtsschädigung,Alterung und Überlastung kann es zu multiplen Schädigungen kommen, diese können sich klinisch als Senkungszustände oder aber auch als Inkontinenz manifestieren, wobei die relative Bedeutung der Schädigung der einzelnen Strukturen auf die Symptomatik noch erforscht werden muss.Schlüsselwörter: Harninkontinenz . Harnröhre . Zystozele . Lateraldefekt . Urethrozele . Deszensus coloproctology Abstract Background: Industrialized countries experience a dramatic increase of older women and it has been shown that both incontinence and prolapse are common among women. Urinary incontinence is a debilitating condition and not only leads to medical problems and costs, but is associated with embarrassment that can lead to isolation and loss of independence.

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Ultrafast MR Imaging of the Pelvic Floor

Cited by 43 publications

References 14 publications

Reconstruction of Three-dimensional Model of Normal Female Pelvic Cavity Based on Magnetic Resonance Imaging

Reconstruction of Three-dimensional Model of Normal Female Pelvic Cavity Based on Magnetic Resonance Imaging

Dynamic pelvic floor MR imaging at 3 T in patients with clinical signs of urinary incontinence-preliminary results

Struktur und Funktion des vorderen Beckenbodenkompartiments der Frau

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