Hata Toshiyuki, Dai Shu-Yan, Kanenishi Kenji, Tanaka Hirokazu
Department of Perinatology and Gynecology, Kagawa University School of Medicine, Miki, Kagawa, Japan.
J Obstet Gynaecol Res. 2009 Apr;35(2):258-61. doi: 10.1111/j.1447-0756.2008.00964.x.
The purpose of this study was to present our first experience of normal embryonic brain vesicle shapes in the early first trimester of pregnancy, reconstructed by three-dimensional (3D) volume-rendered imaging using the inversion mode.
Twenty-three women who were between 7.4 and 9.7 weeks of gestation were studied using 3D ultrasound with a mechanical 3.7-9.3 or 4.5-11.9 MHz 3D transvaginal probe. In order to clarify the anatomical correlation of the embryonic and fetal brain vesicles, the inversion mode was used.
One patient who was at 7.4 weeks of gestation was excluded from the study because of the relative shallow scanning range of the 3D transvaginal transducer and very small embryonic brain structures. When viewed by means of transvaginal 3D volume-rendered imaging using the inversion mode, the brain vesicles were the most prominent structures at each week, and were clearly seen as multilobular consecutive structures. All embryos studied had five secondary brain vesicles. Moreover, the dramatic change of embryonic brain vesicle shapes with advancing gestation was noted during this period.
Our results suggest that transvaginal 3D volume-rendered imaging using the inversion mode provides accurate visualization of embryonic brain vesicle structures in utero.
本研究旨在介绍我们首次通过使用反转模式的三维（3D）容积再现成像重建的妊娠早期正常胚胎脑泡形态的经验。
使用配备机械3.7 - 9.3或4.5 - 11.9 MHz 3D经阴道探头的3D超声对23名妊娠7.4至9.7周的女性进行研究。为了阐明胚胎和胎儿脑泡的解剖学相关性，采用了反转模式。
一名妊娠7.4周的患者因3D经阴道换能器的扫描范围相对较浅以及胚胎脑结构非常小而被排除在研究之外。当通过使用反转模式的经阴道3D容积再现成像观察时，脑泡在每周都是最突出的结构，并且清晰地呈现为多叶连续结构。所有研究的胚胎均有五个次级脑泡。此外，在此期间还注意到随着孕周增加胚胎脑泡形态的显著变化。
我们的结果表明，使用反转模式的经阴道3D容积再现成像可在子宫内准确显示胚胎脑泡结构。
