用于 DNP 化合物快速成像的光谱-空间激发。
Spectral-spatial excitation for rapid imaging of DNP compounds.
机构信息
Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
出版信息
NMR Biomed. 2011 Oct;24(8):988-96. doi: 10.1002/nbm.1743. Epub 2011 Jul 12.
Dynamic nuclear polarization and dissolution offer the exciting possibility of imaging biochemical reactions in vivo, including some of the key enzymatic reactions involved in cellular metabolism. The development of new pulse sequence strategies has been motivated by demanding applications, such as the imaging of hyperpolarized metabolite distributions in the heart. In this article, the key considerations surrounding the application of spectral-spatial imaging pulse sequences for hyperpolarized (13)C metabolic imaging in cardiac and cancer applications are explored. Spiral pulse sequences for multislice imaging of [1-(13)C]pyruvate in the heart were developed, as well as time-resolved, three-dimensional, echo-planar imaging sequences for the imaging of [1-(13)C]pyruvate-lactate exchange in cancer. The advantages and challenges associated with these sequences were determined by testing in pig and rat models.
动态核极化和溶解为在体内成像生化反应提供了令人兴奋的可能性,包括细胞代谢中涉及的一些关键酶反应。新的脉冲序列策略的发展是由高要求的应用所驱动的,例如在心脏中对超极化代谢物分布的成像。在本文中,探讨了应用于心脏和癌症应用中用于超极化(13)C代谢成像的光谱-空间成像脉冲序列的关键考虑因素。开发了用于心脏中[1-(13)C]丙酮酸的多层成像的螺旋脉冲序列,以及用于成像癌症中[1-(13)C]丙酮酸-乳酸交换的时间分辨的三维回波平面成像序列。通过在猪和大鼠模型中的测试,确定了这些序列的优点和挑战。