Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Imaging Arterial Fibres Using Diffusion Tensor Imaging—Feasibility Study and Preliminary Results | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 904091 13 pages doi 2010 904091 Research Article Imaging Arterial Fibres Using Diffusion Tensor Imaging Feasibility Study and Preliminary Results Vittoria Flamini 1 Christian Kerskens 2 Kevin M. Moerman 3 CiaranK. Simms 3 and Caitriona Lally1 3 1 School of Mechanical and Manufacturing Engineering Dublin City University Dublin 9 Ireland 2 Trinity College Institute for Neuroscience Trinity College Dublin Dublin 2 Ireland 3 Trinity Centre for Bioengineering School of Engineering Trinity College Dublin Dublin 2 Ireland Correspondence should be addressed to Caitriona Lally Received 1 May 2009 Revised 13 August 2009 Accepted 21 November 2009 Academic Editor Joao Manuel R. S. Tavares Copyright 2010 Vittoria Flamini et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. MR diffusion tensor imaging DTI was used to analyze the fibrous structure of aortic tissue. A fresh porcine aorta was imaged at 7T using a spin echo sequence with the following parameters matrix 128 X 128 pixel slice thickness mm interslice spacing number of slices 16 echo time s field of view 28 mm X 28 mm. Eigenvectors from the diffusion tensor images were calculated for the central image slice and the averaged tensors and the eigenvector corresponding to the largest eigenvalue showed two distinct angles corresponding to near 0 and 180 to the transverse plane of the aorta. Fibre tractography within the aortic volume imaged confirmed that fibre angles were oriented helically with lead angles of 15 and 175 . The findings correspond to current histological and microscopy data on the fibrous structure of aortic tissue and therefore the eigenvector maps and fibre tractography appear to reflect the .
