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最近,三维(3D)超声显像(US)已进入临床实践,产科是其一个主要的应用领域。虽然胎儿和胎盘的各种先天性疾病能用常规(2D)US论断,但在获得适当的切面影像或产生“胎儿体表”确切印象方面却常遇到困难,且冗长费时。3DUS方法产生容积数据库,在此容积内,可提取任何平面,获得2DUS达不到而又关键的观察面影像,其扫查的解剖结构可以交互操作的方式显示,并从三个互相垂直的平面同时观察。另外,容积数据可重建为结构的体表像,此种功能2DUS做不到。3DUS临床应用的有效性依赖于对获得的立体数据的适当处理和显示。 当前可选显示方式有:①任意平面像;②突出软组织和骨骼的体表重建像;③应用液晶或红/蓝眼镜进行立体观察;④选通数据资料电影回放;⑤实时处理3DUS。 容积数据产生影像的旋转在了解或领会解剖结构时是重要的,旋转角范围视临床情况而定。另外,随着观察量的增加需要存储更多数据。
Recently, three-dimensional (3D) ultrasound imaging (US) has entered clinical practice and obstetrics is one of its major fields of application. Although various congenital diseases of the fetus and placenta can be diagnosed with the conventional (2D) US, it is often difficult and time-consuming to obtain the appropriate sectional image or produce the exact impression of the fetal body surface. The 3DUS method generates a volumetric database within which any plane can be extracted to obtain an unobtainable 2DS view of the key observation surface that is scanned interactively and viewed from three mutually perpendicular planes At the same time observe. In addition, the volume data can be reconstructed as a structure of the body surface, this function can not do 2DUS. The effectiveness of 3DUS clinical applications depends on the proper handling and display of the acquired stereo data. Currently available display modes are: ① any plane like; ② prominent soft tissue and bone surface reconstruction like; ③ liquid crystal or red / blue glasses for stereoscopic observation; ④ strobe data information movie playback; ⑤ real-time processing 3DUS. Volumetric Data Generation The rotation of the image is important to understand or understand the anatomy, and the range of rotation angles depends on the clinical situation. In addition, more data needs to be stored as the amount of observations increases.