灌注成像

J. Dyke
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引用次数: 0

摘要

什么是灌注?灌注描述了在一定时间内输送到组织块毛细血管床的血液量。•将氧气、葡萄糖和其他营养物质从血液输送到组织。•发生在毛细血管水平(半径~ 5 μm)•它的典型特征是三个量:脑血容量(CBV),脑血流量(CBF)和平均传递时间(MTT)。典型的成像体素包含数千个毛细血管。•CBF和MTT测量必须依赖于对运动敏感的技术(例如,丸跟踪技术),CBV可以用其他方法测量(例如,在稳定状态下)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Perfusion Imaging
What is Perfusion • Perfusion describes the amount of blood delivered to the capillary beds of a block of tissue in a certain time period. • Transport of oxygen, glucose and other nutrients from blood to tissue. • Occurs at the capillary level (radius ~ 5 μm) • It is typically characterized by three quantities: cerebral blood volume (CBV), cerebral blood flow (CBF), and mean transit time (MTT). The typical imaging voxel contains several thousand capillaries. • CBF and MTT measurements necessarily rely on techniques sensitive to motion (for instance, bolus tracking techniques), CBV may be measured with other methods (for instance, in a steady state).
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