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病理生理学：肺血流再分布涉及由于某处肺血管床内肺血管阻力增高而致的任何违背于正常分
布的肺内血流。
X 线胸片和CT 表现： 肺血流再分布表现在一个或多个肺区内可见肺血管的大小和数量的减少，
而在其他肺区内血管的数量和大小有相应的增加。二尖瓣病变病人的血流转移向上叶是肺血流再分
布的典型范例。
Pathophysiology.—Pulmonary blood flow redistribution refers to any departure from the normal distribution of blood flow in the lungs that is caused by an increase in pulmonary vascular resistance elsewhere in the pulmonary vascular bed.
Radiographs and CT scans.—Pulmonary blood flow redistribution is indicated by a decrease in the size and/or number of visible pulmonary vessels in one or more lung regions (Fig 1), with a corresponding increase in number and/or size of pulmonary vessels in other parts of the lung. Upper lobe blood diversion in patients with mitral valve disease is the archetypal example of redistribution .
Figure 1: Chest radiograph shows redistribution of blood flow to upper lung zones.
(本文编译参考自Fleischner Society: Glossary of Terms for Thoracic Imaging -- Hansell et al. Radiology 2008;246:697-722.）
文章来自：影像园
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