Phase sensitive reconstruction for water/fat separation in MR imaging using inverse gradient.
This paper presents a novel method for phase unwrapping for phase sensitive reconstruction in MR imaging. The unwrapped phase is obtained by integrating the phase gradient by solving a Poisson equation. An efficient solver, which has been made publicly available, is used to solve the equation. The proposed method is demonstrated on a fat quantification MRI task that is a part of a prospective study of fat accumulation. The method is compared to a phase unwrapping method based on region growing. Results indicate that the proposed method provides more robust unwrapping. Unlike region growing methods, the proposed method is also straight-forward to implement in 3D.
Center for Medical Image Science and Visualization (CMIV), Linköping University, Sweden.
Joakim
J
Rydell
Hans
H
Knutsson
Johanna
J
Pettersson
Andreas
A
Johansson
Gunnar
G
Farnebäck
Olof
O
Dahlqvist
Peter
P
Lundberg
Fredrik
F
Nyström
Magnus
M
Borga
D000273:Adipose Tissue / Q000033:anatomy & histology*; D000328:Adult; D000465:Algorithms; D016477:Artifacts; D001834:Body Water; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D051598:Whole Body Imaging / Q000379:methods*