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• Technical Article •
Field map-based rectification of susceptibility distortion and signal compensation in diffusion tensor imaging
KANG Tai-shan  YANG Tian-he  LIN Jian-zhong  ZHANG Jia-xing 

DOI:10.12015/issn.1674-8034.2017.08.010.


[Abstract] Objective: This study was designed to employ the voxel-based field map to rectify the geometric deformation and compensate the signal loss of diffusion tensor imaging (DTI), and thus facilitate the studies and clinical applications of DTI.Materials and Methods: Brain field maps from 29 healthy persons were first used to get B1 field heterogeneous signals, and then the compensation and phase disconsolation of signals were performed. Finally, the geometry deformations of DTI were rectified and registered to 3D images. Magnetic sensitive bilateral temporal lobes and frontal lobes were selected as regions of interesting and meanwhile, magnetic insensitive thalamus was selected as control area.Results: Geometry deformations of DTI produced by different susceptibilities between specific tissues were completely rectified, and thus the signal loss was compensated and the accuracy of DTI was significantly enhanced.Conclusion: Signal compensations and deformation rectifications can be well achieved using field map, which may improve the applications of DTI in neurosurgery.
[Keywords] Diffusion tensor imaging；Deformation rectification；Field map；Signal compensation

KANG Tai-shan Department of MRI, Zhongshan Affiliated Hospital of Xiamen University, Xiamen 361004, China

YANG Tian-he* Department of MRI, Zhongshan Affiliated Hospital of Xiamen University, Xiamen 361004, China

LIN Jian-zhong Department of MRI, Zhongshan Affiliated Hospital of Xiamen University, Xiamen 361004, China

ZHANG Jia-xing Institute of Brain Diseases and Cognition, Medical College of Xiamen University, Xiamen 361102, China

*Correspondence to: Yang TH, E-mail: yth13606916211@163.com

Conflicts of interest   None.

ACKNOWLEDGMENTS  This work was part of General Program of National Natural Science Foundation of China No.81471630
Received  2017-04-14
Accepted  2017-06-25
DOI: 10.12015/issn.1674-8034.2017.08.010
DOI:10.12015/issn.1674-8034.2017.08.010.

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