High-resolution MR venography at 3.0 Tesla.

摘要: Purpose: The aim of this study was to investigate the visualization small venous vessels in normal human brain at a field strength 3 Tesla. Methods: T2 * -weighted, three-dimensional gradient-echo images were acquired by exploiting magnetic susceptibility difference between oxygenated and deoxygenated hemoglobin vasculature microvasculature. spatial resolution 0.5 x 1 mm , sequence parameters varied obtain good vessel delineation. Improved visibility obtained creating phase mask from resonance multiplying these magnitude images. Venograms created performing minimum intensity projection over targeted volumes. Results: Highly detailed structures deep superficial cortical areas without administration an exogenous contrast agent; compared with similar studies performed 1.5 T, echo time could be reduced typically 40-50 ms 17-28 ms. Conclusion: Imaging high-field offers possibility improved delineation smaller lower strengths.