Geodesic fiber tracking in white matter using activation function

Background and objective:The geodesic ray-tracing method has shown its effectiveness for the reconstruction of fibers in white matter structure. Based on reasonable metrics spaces diffusion tensors, it can provide multiple solutions get robust to noise curvatures fibers. The choice metric tensors a significant impact outcome this method. Our objective is suggest modifications algorithms leading more satisfactory results construction tracts as geodesics. Methods:Starting with DTI modality, we propose rescale initially chosen space increase geodetic cost isotropic regions. This change should be conformal order preserve angles between crossing We also enhance methods employ fourth tensor data handle fiber crossings properly. Results: way choose appropriate class where gets scaled according anisotropy. use logistic functions, which are commonly used statistics cumulative distribution functions. To prevent deviation geodesics from actual paths, hybrid approach. Furthermore, how diagonal projections 4th perform tracking Conclusions: based newly suggested were succesfuly implemented, their performance was tested both synthetic real data, compared some previously known approaches.