Method for determining e.g. fiber directions of muscle fibers of blood vessel in left ventricle of human heart, involves comparing local elongations and elongation portions to determine intrinsic anisotropy of tissue

摘要

#CMT# #/CMT# The method involves reading data of a detected three-dimensional (3D) movement of predetermined positions (P1, P2) of a hollow body wall (6). 3D local elongations of the predetermined positions are determined from the detected movement. Geometrically defined elongation portions in the predetermined positions are calculated by simulation. A compensated 3D elongation state is calculated by correction of the 3D local elongations with the elongation portions. The 3D local elongations and the elongation portions are compared for determining intrinsic anisotropy of a tissue. #CMT# : #/CMT# An independent claim is also included for a computer program product comprising a set of instructions for performing a method for determining an intrinsic anisotropy of a wall material of a flexible hollow body. #CMT#USE : #/CMT# Method for determining an intrinsic anisotropy e.g. fiber directions (claimed) and material property, of a wall material i.e. muscle fibers, of a tissue i.e. blood vessel, in a flexible hollow body i.e. left ventricle, of heart of a human and animal. #CMT#ADVANTAGE : #/CMT# The method enables comparing the 3D local elongations and the geometrically defined elongation portions for determining the intrinsic anisotropy of the tissue such that the fiber directions of the required fibers can be obtained, thus allowing evaluation of amount of contraction of the heart in a better and precise manner without requirement of precise knowledge of inner pressure. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a photograph representation illustrating a short axis image of a left ventricle with two local non-cylindrical heart coordinate systems. C1, C2 : Circumferential directions P1, P2 : Predetermined positions of hollow body wall 1 : Muscle fibers 5 : Short meridional section 6 : Hollow body wall.