'China based Shantou Institute of Ultrasonic Instruments (SIUI) has been engaged in the development and manufacture of medical ultrasonic diagnosis scanners, industrial ultrasonic detectors and ultrasonic transducers since the early 1960's. Starting as a small scientific research institute, SIUI has developed into a key high-tech corporation at the national level, and is the leading manufacturer of ultrasonic instruments in China.'
'SIUI is dedicated to providing all customers with the ultrasonic scanners of high quality and reasonable price. The annual production amounts to 5,000 ultrasonic scanners and 10,000 transducers. SIUI takes the lead in attaining ISO9001 certification, FDA clearance and CE marking in China. Due to the high ratio of performance to price as well as the guarantee on quality, the products are exported to over 80 countries and areas around the world. The export volume ranks No. 1 in this field in China. The market share continues to improve.'

Ultrasound Systems:

The skinline is the ultrasonic penetration depth corresponding to the skin / transducer interface on the display.

The dimension of the ultrasound beam and the transducer array are the origin of the slice thickness artifact. This artifact is also called partial volume artifact or volume averaging artifact.

See also Validation.

As the sound travels through a relatively homogeneous medium it propagates in essentially a straight line. When the sound reaches an interface a part of the incident beam is reflected, and a part is refracted (transmitted). Snells law governs the direction of the transmitted beam when refraction occurs:
sin qt = (c2/c1) x sin qi (qt is the transmit and qi is the incident angle)
The amount of sound that is reflected depends on the degree of difference between the two media; the greater the acoustic mismatch, the greater the amount of sound reflected. In addition, the amount of ultrasound reflected or refracted depends on the angle at which the sound beam hits the interface between the different media. As the angle of incidence approaches 90°, a higher percentage of the ultrasound is reflected.

See also Sonographic Features.

(TIS) The bone thermal index is an exposure model for the case that the ultrasound beam heats primarily soft tissue.