The soft-tissue surfaces reflect the sound and the resulting pattern of sound reflection is processed by a computer to produce a moving image on a screen or on photographic film. The sound is produced by a rapidly oscillating crystal and, with a frequency greater than 20 kHz, is inaudible to humans. As ultrasound
equipment information goes, the crystal vibrates for one millionth of a second about 500 times per second. A transducer is used to transmit the sound and receive the echoes. Ultrasound can be used to examine the arterial system; the heart; the pancreas; the peritoneal cavity; the urinary tract; the ovaries; the venous system; the brain; and the spinal cord. When ultrasound is used to examine the heart, it is known as echocardiography. Echocardiography is used to study congenital heart disease, coronary artery disease, tumours of the heart, and other cardiac disorders. Ultrasound can also be used to guide surgical procedures, for example during amniocentesis or the insertion of a biopsy needle into a particular area. Ultrasound sales of machinery
for Doppler ultrasound, used to measure the flow of a body liquid, blood flow etc, are on the rise .
Clinical departments provide ultrasonic equipment information that include a range of special diagnostic facilities such as X-ray, computerized axial tomography, and ultrasound scanning, electrodiagnostic facilities and pathology laboratories; pharmaceutical services; physiotherapy. New and better methods of seeing inside the human body were developed in the latter half of the 20th century. In the 1970s a special camera sensitive to gamma radiation was developed for locating specific cancers. Diagnosis of head injury was aided greatly by the invention in 1975 of a computer-assisted X-ray device called a computerized axial tomography (CAT) scanner; other imaging systems include positron emission tomography and nuclear magnetic resonance imaging,that require ultrasound services. Very-high-frequency sound waves have been used in this way for several years.
And more of ultrasound equipment information further below. Ultrasonic cleaners, also called supersonic cleaners, may be used at 20-40 kHz frequencies for lenses and other optical parts, jewelry, watches, surgical instruments, dental instruments, and industrial parts. Ultrasound, when used in particular configurations, can generate interesting phenomena called sonoluminescence. These phenomena are probed moderately because of the likelihood of bubble fusion. Speaking about ultrasound sales, it is useful to mention that ultrasound speaker/generator systems are extensively sold these days with claims, that advertised units can frighten away insects and rodents, although there are no scientific proofs that it is really so. Home ultrasonic cleaners are also available today and cost from approx $100 US.
Now back to medical field where we will review some of medical ultrasound equipment information.
Medical ultrasound equipment transmits analog 2 to 20 MHz signal into the human body and then uses signal that has been reflected from various human body organs to visualize images of body`s internal organs. The reconstructed picture is then transmitted and displayed on the operator screen. Tissues of the body reflect and transmit beams, forming card signals. Each channel on the channel card increases the received signal and also converts it with the help of high speed A/D converter. Then the digital data from all channels are used in the process of receive-beam-forming. System architecture affects the number of channels on a particular receive channel card. And we conclude the article with ultrasound equipment information about ultrasound services and ultrasound sales market research. It has recently been revealed, that the increase in use of ultrasound equipment by new and new groups of users increases in its turn market revenues. Comprehensive ultrasound equipment information, including the information on ultrasound sales and ultrasound services, is available at the web sites of major ultrasound equipment manufacturers.