Mai V M, Chen Q, Bankier A A, Zhang M, Hagspiel K D, Berr S S, Edelman R R
Department of Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA.
Magn Reson Med. 2000 Jun;43(6):793-5. doi: 10.1002/1522-2594(200006)43:6<793::aid-mrm3>3.0.co;2-e.
A technique is described for imaging pulmonary blood flow using a phase-sensitive selective inversion recovery (PS-SIR) sequence. PS-SIR image reconstruction provides excellent contrast, differentiating fully relaxed inflowing blood from inverted blood and lung tissue. The magnetization of the inverted tissues remains negative at any inversion delay less than that at which the magnetization of the lung tissue is nulled, whereas that of the fully relaxed inflowing blood is always positive. Pulmonary blood flow can be observed by tracking the propagation of the pixels with positive values. Five healthy volunteers were imaged. The normal pattern of blood flow advancing from the central arteries toward the peripheries and into the lung parenchyma with return toward the center via draining veins was depicted. The method offers promise for evaluating pulmonary blood flow without the need for image subtraction or contrast administration. Magn Reson Med 43:793-795, 2000.
描述了一种使用相敏选择性反转恢复（PS-SIR）序列对肺血流进行成像的技术。PS-SIR图像重建提供了出色的对比度，可将完全弛豫的流入血液与反转血液及肺组织区分开来。在任何小于肺组织磁化归零的反转延迟时间内，反转组织的磁化仍为负，而完全弛豫的流入血液的磁化始终为正。通过跟踪具有正值的像素的传播可以观察到肺血流。对五名健康志愿者进行了成像。描绘了血流从中央动脉向周边推进并进入肺实质，然后通过引流静脉返回中心的正常模式。该方法有望在无需图像减法或注射造影剂的情况下评估肺血流。《磁共振医学》43:793 - 795, 2000年。
