From SIUI Inc.;
'SIUI's newly developed CTS-485 is a portable ultrasound system with advanced technology. With its powerful features, such as 256 grayscale, cineloop, RS232C interface and broadband high-density, multi-frequency probes, the system is designed for professional applications in cardiology, abdominal, small parts, liver, gallbladder, kidney, obstetrics, gynecology, peripheral vascular, etc. The CTS-485 has passed FDA clearance and CE Marking.'

From SIUI Inc.;
'The CTS-285 is designed for the diagnosis of liver, gallbladder, kidney, pancreas, thyroid, breast, uterus, bladder, ovary, etc. It is a portable versatile ultrasound scanner with convex and linear array scanning.'

Hitachi Medical Systems America Inc.;
The EUB-525 is a mid-size ultrasound system with a full feature set. Capable of B-mode, M-mode, Doppler, color flow and color angiography it performs a variety of tasks in a simple and straightforward fashion. This system produces high quality images with excellent clarity and detail.

A rectal probe is a small ultrasound transducer with high frequency that is inserted directly into the rectum. Transrectal ultrasound is a well established examination for rectal or prostate carcinoma assessment. Rectal probes (e.g., a microconvex probe) generate a much sharper image, caused by the close proximity to the prostate or rectum, and the higher sensitivity.

Different sound velocities in tissue are causing refraction artifacts. With convex elastomer lens transducers, sound beam refraction at the skin interface can alter the transducer's focusing characteristics and beam profile, cause element to element nonuniformity, and cause phase changes in the acoustic wave. These cumulative refraction induced errors degrade the image quality through distortion and loss of resolution. Because the amount of refraction is proportional to the velocity mismatch, the greater the mismatch, the greater the refraction.