Widder B
Ultraschall Med. 1985 Oct;6(5):286-90. doi: 10.1055/s-2007-1006071.
In contrast to cw-Doppler sonography, ultrasound B-mode imaging is rarely applied in routine examinations for carotid artery stenosis. This may be due to the fact that B-mode imaging without accompanying Doppler sonography lacks reliability, and that Duplex scanners with pulsed Doppler modules are expensive. In this paper a method is described for constructing a cw-Duplex scanner by slight modification and combination of conventional B-mode and cw-Doppler devices. Our experience with this equipment shows that it facilitates clear distinction of the carotid branches on the B-mode image, and that it is capable of visualising carotid occlusions as well as overlapping and atypical vascular courses, all of which frequently limit the diagnostic potential of Doppler sonography. For routine examinations of the carotid bifurcation, ease of application and considerably lower costs make the cw-Duplex scanner preferable to pulsed Duplex devices.
与连续波多普勒超声检查不同，超声B模式成像很少用于颈动脉狭窄的常规检查。这可能是因为没有伴随多普勒超声的B模式成像缺乏可靠性，而且带有脉冲多普勒模块的双功能扫描仪价格昂贵。本文描述了一种通过对传统B模式和连续波多普勒设备进行轻微修改和组合来构建连续波双功能扫描仪的方法。我们使用该设备的经验表明，它有助于在B模式图像上清晰区分颈动脉分支，并且能够显示颈动脉闭塞以及重叠和非典型血管走行，所有这些情况经常限制多普勒超声检查的诊断潜力。对于颈动脉分叉的常规检查，连续波双功能扫描仪应用简便且成本低得多，比脉冲双功能设备更可取。
