Conclusion. Intraosseous ultrasound is a highly reliable technique for the intraoperative assessment of pedicle screw holes before pedicle screw placement.
结论：对于在椎弓根螺钉放置前术中评估椎弓根螺钉进针骨通道而言，骨内超声检查一项很可靠的技术。
In bridge condition monitoring and assessment system, optimal placement of sensors is key to ensure monitoring information being economic and effective. Moreover, it is one of the hot questions.
在桥梁结构状态监测评估系统中，传感器优化配置问题是监测信息经济可靠的关键，也是业内广泛关注的热点问题之一。
Vessel overlapping and foreshortening in angiographic images may cause errors in the assessment of lesions or the selection and placement of stents, and can be influenced by the viewing angles.
由于透视投影成像导致的血管重叠和投影缩短会引起血管狭窄估计及支架选择和放置错误，而血管重叠和投影缩短与造影角度的选择有关。
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