Digital Ultrasound Scanner B/W – NSL Eco-1 Chison (China)

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    Digital Ultrasound Scanner(also known asdiagnostic sonographyorultrasonography) is adiagnostic imagingtechnique based on the application of超声. It is used to see internal body structures such astendons,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pathology. The practice of examiningpregnantwomen using ultrasound is calledobstetric ultrasound,并且被广泛使用。

    Ultrasoundissound waveswith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.

    Many different types of images can be formed using sonographic instruments. The most well-known type is a B-mode image, which displays the acoustic impedance of a two-dimensional cross-section of tissue. Other types of image can displayblood flow,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.

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