1 April 2016 Determining cardiac fiber orientation using FSL and registered ultrasound/DTI volumes
Author Affiliations +
Abstract
Accurate extraction of cardiac fiber orientation from diffusion tensor imaging is important for determining heart structure and function. However, the acquisition of magnetic resonance (MR) diffusion tensor images is costly and time consuming. By comparison, cardiac ultrasound imaging is rapid and relatively inexpensive, but it lacks the capability to directly measure fiber orientations. In order to create a detailed heart model from ultrasound data, a three-dimensional (3D) diffusion tensor imaging (DTI) with known fiber orientations can be registered to an ultrasound volume through a geometric mask. After registration, the cardiac orientations from the template DTI can be mapped to the heart using a deformable transformation field. This process depends heavily on accurate fiber orientation extraction from the DTI. In this study, we use the FMRIB Software Library (FSL) to determine cardiac fiber orientations in diffusion weighted images. For the registration between ultrasound and MRI volumes, we achieved an average Dice similarity coefficient (DSC) of 81.6±2.1%. For the estimation of fiber orientations from the proposed method, we achieved an acute angle error (AAE) of 22.7±3.1° as compared to the direct measurements from DTI. This work provides a new approach to generate cardiac fiber orientation that may be used for many cardiac applications.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James Dormer, James Dormer, Xulei Qin, Xulei Qin, Ming Shen, Ming Shen, Silun Wang, Silun Wang, Xiaodong Zhang, Xiaodong Zhang, Rong Jiang, Rong Jiang, Mary B. Wagner, Mary B. Wagner, Baowei Fei, Baowei Fei, "Determining cardiac fiber orientation using FSL and registered ultrasound/DTI volumes", Proc. SPIE 9790, Medical Imaging 2016: Ultrasonic Imaging and Tomography, 979015 (1 April 2016); doi: 10.1117/12.2217296; https://doi.org/10.1117/12.2217296
PROCEEDINGS
7 PAGES


SHARE
Back to Top