Michael
Bach1, 2, Klaus Fritzsche3, Sena Minjoli2,
Bram Stieltjes1, Frederik Bernd Laun, 12
1Quantitative Imaging-based Disease Characterization, German Cancer Research Center, Heidelberg, Germany; 2Dept. of Medical Physics in Radiology, German Cancer Research Center, Heidelberg, Germany; 3Medical Imaging and Biological Informatics, German Cancer Research Center, Heidelberg, Germany
The phantom presented here consists of six circular fiber strands of different cross sections (5x5 mm^2, 3x3 mm^2, 2.5x2.5 mm^2, 2x2 mm^2, 1.5x1.5 mm^2, 1x1 mm^2). These fiber strands are characterized by a homogeneous and high FA (up to 0.9). The precision, with which the fiber strands can be produced, opens up new possibilities with regard to the validation of the whole diffusion tensor imaging process. Presented data shows resolution and partial volume effects in DTI and tracked fibers. For example, a rotation of the field of view leads to more pronounced partial volume effects and therefore thicker strands.