Descrition:
10英寸屏幕尺寸折叠键板动态rannge TGC增益控制B BB BM M 4B模式闪烁以获取图像storige flash for图像电视re静cine memory映像storige storige storige距离bpd bpd fl ac hc hc hc hc gs gs edd b视图：332
Ultrasound Scanner (also known asdiagnostic sonography或者超声检查）是diagnostic imagingtechnique based on the application of超声。It is used to see internal body structures such as肌腱,muscles，关节，血管和内部器官。它的目的通常是要找到疾病的来源或排除任何病理。检查的做法孕使用超声的妇女称为obstetric ultrasound，并且被广泛使用。
Ultrasoundis声波with频率which are higher than those audible to humans (>20,000 Hz). Ultrasonic images, also known as sonograms, are made by sending pulses of ultrasound intotissueusing a探测。The soundechoesoff the tissue; with different tissues reflecting varying degrees of sound. These echoes are recorded and displayed as an image to the operator.
可以使用超声仪形成许多不同类型的图像。最著名的类型是B模式图像，它显示了组织二维横截面的声阻抗。其他类型的图像可以显示血流量，随着时间的推移，组织的运动，血液的位置，特定分子的存在，stiffness of tissue, or theanatomy of a three-dimensional region。
与其他突出的医学成像方法相比，超声具有多个优点。它实时提供图像，是便携式的，可以带到床边，成本大大降低，并且不使用有害ionizing radiation。Drawbacks of ultrasonography include various limits on its field of view, such as the need for patient cooperation, dependence on physique, difficulty imaging structures behindboneand air, and the necessity of a skilled operator, usually a trained professional.
Reviews
尚无评论。