Single-Shot ${\text{T}}_{{2}}$ Mapping Through OverLapping-Echo Detachment (OLED) Planar Imaging.
Develop a reliable single-shot T2mapping method with extra robustness to motion and the potential for real-time dynamic and quantitative MR imaging.



A single-shot T2mapping sequence was proposed based on spin-echo planar imaging acquisition scheme. Two overlapped echo signals with different T2weighting were obtained simultaneously by using two small flip-angle excitation pulses and corresponding echo-shifting gradients. A detachment algorithm based on structure similarity constraint was proposed to separate the two echo signals. T2mapping was obtained from the two separated echo signals.



The robustness and efficiency of the method were demonstrated through simulation, phantom experiments, and human brain measurements.



Reliable T2mapping can be obtained within milliseconds even under continuous head motion.



Reliable T2mapping was achieved with a single shot for the first time. The proposed method will facilitate real-time dynamic and quantitative MR imaging.
Congbo
C
Cai
Yiqing
Y
Zeng
Yuchuan
Y
Zhuang
Shuhui
S
Cai
Lin
L
Chen
Xinghao
X
Ding
Lijun
L
Bao
Jianhui
J
Zhong
Zhong
Z
Chen
D000465:Algorithms; D017352:Echo-Planar Imaging / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted