[Magnetic resonance tomography as the basis for biomechanical analysis. The simulation of the birth process as an example of the expanded information potentials of segmental imaging procedures].
A method is presented that enables the use of (static) informations from magnetic resonance imaging (MRI) for (dynamic) biomechanical analysis. Using a specially developed software MRI pixel matrices are colour-coded and--according to the principle of same density--line data are created. After sectional attribution of the resulting polygons a three-dimensional mesh of so-called finite elements is created which can then be used in deformation analysis. This method is exemplified by a project dealing with the simulation of birth mechanics, which is finally aimed at validating the results from radiologic pelvimetry. First analyses show that even under foetal head moulding conditions, being considered as normal, such sensitive structures as the cerebellum, brain stem as well as the ventricles with the plexus chorioidei are to be found within the maximum isobars within a range of 104-140 N(10.6-14.3 kp).
Wischnik
A
A
Frauenklinik, Klinikum Mannheim.
Lehmann
K J
KJ
Nalepa
E
E
Wentz
K U
KU
Georgi
M
M
Melchert
F
F
D000328:Adult; D001696:Biomechanical Phenomena; D003116:Color; D003198:Computer Simulation; D003201:Computers; D005260:Female; D006801:Humans; D007746:Labor Presentation; D007743:Labor, Obstetric; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008954:Models, Biological; D011247:Pregnancy; D012984:Software