What does Cereb Hill mean on ultrasound
Synonyms: sonography, "ultrasound"
English: ultrasound, sonography
Under Sonography In medicine, one understands the use of ultrasound to examine organic tissue. The image produced by sonography is called a sonogram.
Sonography is one of the most frequently used imaging procedures in medicine.
2 basic principle
Sonography is based on the echo principle. Directed ultrasound is emitted and reflected to a greater or lesser extent by the successive layers of the sonicated object. The layer structure of the object can be reconstructed from the transit time of the reflected signal.
Optical coherence tomography (OCT) and coherence radar represent a similar principle on an optical basis. In the radio wave range, radar uses the echo principle.
3 display methods
The informative value of sonography can be increased by using the Doppler effect, which is used, for example, in color Doppler sonography.
In B-mode, currently the most common application of ultrasound, the following rough rule applies: Everything that is displayed in black (dark) is more or less liquid. Everything that is represented in white is either air, bone or other lime. In order to be able to differentiate the tissues better, special contrast media are also used in abdominal sonography.
In the sonogram, the representation of the structures or tissue with regard to their echogenicity is described as:
4.1 Structures that can be easily represented
All liquid or soft structures accessible from the outside can be easily represented, e.g .:
4.2 Structures that are difficult to visualize
All structures that contain air or are surrounded or covered by hard tissue (bones), e.g.
The different forms of sonography are usually named after the examined organ or the access route of the transducer. Examples are:
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