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Hyperpolarized 13C pyruvate mouse brain metabolism with absorptive-mode EPSI at 1 T

机译:1T时具有吸收模式EPSI的超极化13C丙酮酸小鼠大脑新陈代谢

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摘要

The expected signal in echo-planar spectroscopic imaging experiments was explicitly modeled jointly in spatial and spectral dimensions. Using this as a basis, absorptive-mode type detection can be achieved by appropriate choice of spectral delays and post-processing techniques. We discuss the effects of gradient imperfections and demonstrate the implementation of this sequence at low field (1.05 T), with application to hyperpolarized [1-13C] pyruvate imaging of the mouse brain. The sequence achieves sufficient signal-to-noise to monitor the conversion of hyperpolarized [1-13C] pyruvate to lactate in the mouse brain. Hyperpolarized pyruvate imaging of mouse brain metabolism using an absorptive-mode EPSI sequence can be applied to more sophisticated murine disease and treatment models. The simple modifications presented in this work, which permit absorptive-mode detection, are directly translatable to human clinical imaging and generate improved absorptive-mode spectra without the need for refocusing pulses.
机译:回波平面光谱成像实验中的预期信号明确地在空间和光谱维度上共同建模。以此为基础,可以通过适当选择频谱延迟和后处理技术来实现吸收模式类型检测。我们讨论了梯度缺陷的影响,并演示了该序列在低场(1.05 T)下的实现,并将其应用于小鼠脑的超极化[1- 13 C]丙酮酸成像。该序列获得了足够的信噪比,可以监测小鼠脑中超极化的[1- 13 C]丙酮酸向乳酸的转化。使用吸收模式EPSI序列的小鼠脑代谢的超极化丙酮酸成像可以应用于更复杂的鼠类疾病和治疗模型。这项工作中提出的简单修改允许吸收模式检测,可直接转换为人类临床成像,并产生改进的吸收模式光谱,而无需重新聚焦脉冲。

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