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Feasibility of diffusion tensor imaging (DTI) with fibre tractography of the normal female pelvic floor.

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Title: Feasibility of diffusion tensor imaging (DTI) with fibre tractography of the normal female pelvic floor.
Authors: Zijta FM (AUTHOR), Froeling M (AUTHOR), van der Paardt MP (AUTHOR), Lakeman MM (AUTHOR), Bipat S (AUTHOR), Montauban van Swijndregt AD (AUTHOR), Strijkers GJ (AUTHOR), Nederveen AJ (AUTHOR), Stoker J (AUTHOR), Zijta, F M1 (AUTHOR), Froeling, M (AUTHOR), van der Paardt, M P (AUTHOR), Lakeman, M M E (AUTHOR), Bipat, S (AUTHOR), van Swijndregt, A D Montauban (AUTHOR), Strijkers, G J (AUTHOR), Nederveen, A J (AUTHOR), Stoker, J (AUTHOR)
Source: European Radiology. Jun2011, Vol. 21 Issue 6, p1243-1249. 7p.
Abstract: Objectives: To prospectively determine the feasibility of diffusion tensor imaging (DTI) with fibre tractography as a tool for the three-dimensional (3D) visualisation of normal pelvic floor anatomy.Methods: Five young female nulliparous subjects (mean age 28 ± 3 years) underwent DTI at 3.0T. Two-dimensional diffusion-weighted axial spin-echo echo-planar (SP-EPI) pulse sequence of the pelvic floor was performed, with additional T2-TSE multiplanar sequences for anatomical reference. Fibre tractography for visualisation of predefined pelvic floor and pelvic wall muscles was performed offline by two observers, applying a consensus method. Three eigenvalues (λ1, λ2, λ3), fractional anisotropy (FA) and mean diffusivity (MD) were calculated from the fibre trajectories.Results: In all subjects fibre tractography resulted in a satisfactory anatomical representation of the pubovisceral muscle, perineal body, anal - and urethral sphincter complex and internal obturator muscle. Mean FA values ranged from 0.23 ± 0.02 to 0.30 ± 0.04, MD values from 1.30 ± 0.08 to 1.73 ± 0.12 × 10(-)³ mm²/s. Muscular structures in the superficial layer of the pelvic floor could not be satisfactorily identified.Conclusions: This study demonstrates the feasibility of visualising the complex three-dimensional pelvic floor architecture using 3T-DTI with fibre tractography. DTI of the deep female pelvic floor may provide new insights into pelvic floor disorders. [ABSTRACT FROM AUTHOR]
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Abstract:<bold>Objectives: </bold>To prospectively determine the feasibility of diffusion tensor imaging (DTI) with fibre tractography as a tool for the three-dimensional (3D) visualisation of normal pelvic floor anatomy.<bold>Methods: </bold>Five young female nulliparous subjects (mean age 28 ± 3 years) underwent DTI at 3.0T. Two-dimensional diffusion-weighted axial spin-echo echo-planar (SP-EPI) pulse sequence of the pelvic floor was performed, with additional T2-TSE multiplanar sequences for anatomical reference. Fibre tractography for visualisation of predefined pelvic floor and pelvic wall muscles was performed offline by two observers, applying a consensus method. Three eigenvalues (λ1, λ2, λ3), fractional anisotropy (FA) and mean diffusivity (MD) were calculated from the fibre trajectories.<bold>Results: </bold>In all subjects fibre tractography resulted in a satisfactory anatomical representation of the pubovisceral muscle, perineal body, anal - and urethral sphincter complex and internal obturator muscle. Mean FA values ranged from 0.23 ± 0.02 to 0.30 ± 0.04, MD values from 1.30 ± 0.08 to 1.73 ± 0.12 × 10(-)³ mm²/s. Muscular structures in the superficial layer of the pelvic floor could not be satisfactorily identified.<bold>Conclusions: </bold>This study demonstrates the feasibility of visualising the complex three-dimensional pelvic floor architecture using 3T-DTI with fibre tractography. DTI of the deep female pelvic floor may provide new insights into pelvic floor disorders. [ABSTRACT FROM AUTHOR]
ISSN:09387994
DOI:10.1007/s00330-010-2044-8