A new susceptibility-weighted image reconstruction method for the reduction of background phase artifacts.

摘要: Purpose To significantly reduce the background phase effects, especially at air–tissue interface, and to enhance desirable local structures of veins in susceptibility-weighted imaging. Methods In proposed reconstruction method called Magnitude Complex Filtering, a complex-valued magnetic resonance image is acquired using flow-compensated high-resolution 3D gradient-echo sequence magnitude set 1 so that information, which contains details susceptibility, emphasized. Then, nonlinear filter Filtering applied with constant magnitude. This utilizes low-pass high-pass filtered complex data selectively effects while enhancing structures. The output then processed generate image. Results Compared conventional images generated by homodyne filter, from show significant improvement; undesirable artifacts interface regions brain boundaries are reduced, contrast enhanced. Conclusion The successfully reduced most without requiring additional processing or scan time. Magn Reson Med 71:1324–1335, 2014. © 2013 Wiley Periodicals, Inc.