Simultaneous measurement system for elastic biological wall motions and its inner flow motions - Is the aneurysm for a disease or for a self-defense?

Abstract

To understand the flow structure interactions (FSI) phenomena between the aneurysm and its inside flows, a new measurement technique has been proposed. An in-vitro test has been carried out for an aneurysm model. The constructed measurement system consists of four-camera system (500fps, 1028 x 1024 pixels), a laser source and a host computer. 4D-PTV(four-dimensional particle tracking velocimetry) technique has been applied for the measurement system. Two cameras are used for capturing the wall motions of the aneurysm, and the other two cameras are used for capturing the fluid motions inside of the aneurysm. All cameras are synchronized for FSI analyses of the aneurysm. For the analyses of the wall motions of the aneurysm, motion tracking algorithm has been constructed. For the analyses of the fluid motions of the aneurysm, volumetric PIV measurements have been carried. From the in-vitro tests for the pulsative input to the aneurysm, it seems that the aneurysm works as the pressure stabilizer as in the mechanical system. © 2010 International Federation for Medical and Biological Engineering.