Dighe Manjiri K, Moshiri Mariam, Jolley Jennifer, Thiel Jeff, Hippe Dan
Department of Radiology, Body Imaging Section, University of Washington, Seattle, USA.
School of Medicine, University of California, Irvine, Irvine, USA.
Ultrasound. 2018 Aug;26(3):160-167. doi: 10.1177/1742271X18768841. Epub 2018 Apr 6.
B-Flow imaging directly displays the flowing intravascular echoes during real-time gray-scale ultrasound without using Doppler techniques. The objective of our study was to evaluate the feasibility of B-Flow imaging in the placenta and to evaluate the artifacts seen on B-Flow imaging. After IRB approval, 36 women (17 normal and 19 high risk women) were enrolled in our study. B-Flow images were acquired on GE LOGIC E9 machine. Retrospective analysis of the B-Flow and cine capture images was performed for artifacts and for vessels visualized. Pregnant women enrolled in the study ranged from 19 to 43 years of age with an average age of 31.7 years. Gestational age varied from 17 weeks and five days to 36 weeks and three days with an average of 26 weeks and three days. From a total of 161 B-Flow images reviewed by one researcher, 15 images were acceptable with no evidence of artifact. The remainder of the images had some artifact in them. For the 36 women with color Doppler and B-Flow images reviewed by the two independent blinded reviewers, a total of 144 reads were obtained. More small horizontal (p = 0.046) and small vertical running vessels (p < 0.001) were identified with B-Flow than color Doppler images. B-Flow is capable of showing perfusion in a human placenta; however, recognizing artifacts and modifying the image acquisition to reduce artifacts is necessary with this new technique to acquire the best images for interpretation.
B 流成像在实时灰阶超声检查过程中不使用多普勒技术即可直接显示血管内流动回声。我们研究的目的是评估 B 流成像在胎盘中的可行性，并评估 B 流成像中出现的伪像。经机构审查委员会（IRB）批准后，36 名女性（17 名正常女性和 19 名高危女性）纳入我们的研究。在 GE LOGIC E9 机器上采集 B 流图像。对 B 流图像和动态捕捉图像进行回顾性分析，以观察伪像和可见血管。纳入研究的孕妇年龄在 19 至 43 岁之间，平均年龄为 31.7 岁。孕周从 17 周零 5 天至 36 周零 3 天不等，平均为 26 周零 3 天。一名研究人员审查了总共 161 幅 B 流图像，其中 15 幅图像可接受，无伪像证据。其余图像均存在一些伪像。对于由两名独立的盲法审查员审查的 36 名女性的彩色多普勒图像和 B 流图像，共获得 144 次读数。与彩色多普勒图像相比，B 流成像识别出更多的小水平走行血管（p = 0.046）和小垂直走行血管（p < 0.001）。B 流成像能够显示人胎盘的灌注情况；然而，对于这项新技术，识别伪像并修改图像采集以减少伪像对于获取最佳解释图像是必要的。
