The digital IF receiving and the high-speed digital signal processing technologies are adopted to achieve the high resolution and the high-speed 2-d imaging.
该系统采用数据中频接收和高速数字信号处理技术来实现高分辨率、高速二维成像。
Methods: The imaging findings of 6 cases of ureter cyst in 2-d ultrasound and CDFI were analyzed retrospectively.
方法：对6例输尿管囊肿的二维灰阶超声及彩色多普勒血流显像表现进行了回顾性分析。
The main difficulties in implementing 3-d imaging by a 2-d array are the need for more elements and more channels, the system complexity and weak signals.
基于二维阵列的三维成像在实现上具有阵元多、通道数多、系统复杂、回波信号弱等困难。
Methods 49 patients with venous valvular insufficiency were examined using 2-D color Doppler flow imaging to observe the anatomic structures of valves and hemodynamics of venous flow in legs.
方法应用二维彩色多普勒血流显像检查下肢静脉瓣功能不全49例，观察下肢静脉血管及瓣膜的解剖结构和血流动力学的改变。
Objective To evaluate the diagnosis evidence of malignant tumors in the parotid gland by using two -dimensional ultrasonography (2-d) and color Doppler flow imaging (CDFI).
目的：采用二维超声图像并结合彩色多谱勒血流显像探讨腮腺恶性肿瘤的超声诊断依据。
This article reports 17 cases with retroperitoneal masses diagnosed by 2-d imaging and duplex Doppler, including 3 benign masses (17.6%), 13 malignant tumor, (76.5%) and one malignant potential.
本文报告了17例经二维及双功能多普勒超声诊断的腹膜后肿物，其中良性肿物3例(17.6%)，恶性肿瘤13例(76.5%)，有恶性倾向的肿瘤1例。
This article reports 17 cases with retroperitoneal masses diagnosed by 2-d imaging and duplex Doppler, including 3 benign masses (17.6%), 13 malignant tumor, (76.5%) and one malignant potential.
本文报告了17例经二维及双功能多普勒超声诊断的腹膜后肿物，其中良性肿物3例(17.6%)，恶性肿瘤13例(76.5%)，有恶性倾向的肿瘤1例。
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