Source:http://linkedlifedata.com/resource/umls/id/C0302622
SPN: An ultrasonic pulsed doppler imaging system is a device that combines the features of continuous wave doppler-effect technology with pulsed-echo effect technology and is intended to determine stationary body tissue characteristics, such as depth or location of tissue interfaces or dynamic tissue characteristics such as velocity of blood or tissue motion. This generic type of device may include signal analysis and display equipment, patient and equipment supports, component parts, and accessories.,UMD: Scanning systems that use sound waves at frequencies (typically in the range of 2 to 15 MHz) well above the level of human hearing to generate an image of tissue in a transverse plane of the body. These systems convert an electrical signal into ultrasonic energy that is transmitted into tissues. The intensity, time, and direction of the echoes are measured and processed to generate an amplitude display (A-mode), a two-dimensional "brightness modulated" image display (B-mode), or a one-dimensional graphic di