'Focus' p9 Searchterm 'Focus' found in 55 articles 4 terms [ • ] - 51 definitions [• ] Result Pages : •
As far as ultrasound is concerned, 4D ultrasound (also referred to as live 3D ultrasound or 4B-mode) is the latest ultrasound technology - the fourth dimension means length, width, and depth over time. 4D Ultrasound takes 3D ultrasound images and adds the element of time to the progress so that a moving three-dimensional image is seen on the monitor. A 4D scan takes the same amounts of time as a 2D or 3D scan; the difference is the ultrasound equipment being used. One advantage of a 4D fetal ultrasound to a 2D-mode is that parents can see how their baby will generally look like. However, there are different opinions over the medical advantages. To scan a 3D ultrasound image, the probe is swept over the maternal abdomen. A computer takes multiple images and renders the 3D picture. With 4D imaging, the computer takes the images as multiple pictures while the probe is hold still and a 3D image is simultaneously rendered in real time on a monitor. In most cases, the standard 2D ultrasound is taken, and then the 3D/4D scan capability is added if an abnormality is detected or suspected. The 3D/4D sonogram is then focused on a specific area, to provide the details needed to assess and diagnose a suspected problem. A quick 4D scan of the face of the fetus may be performed at the end of a routine exam, providing the parents with a photo. See also Obstetric and Gynecologic Ultrasound, Pregnancy Ultrasound, Fetal Ultrasound and Abdominal Ultrasound. •
The prostate is a walnut-shaped gland surrounding the beginning of the urethra in front of the rectum and below the bladder. The prostate can become enlarged (particularly in men over age 50) and develop diseases like prostate cancer or inflammation (prostatitis). A large tumor can be felt by a rectal examination. The most effective way of detecting the early signs of prostate cancer is a combination of a prostate-specific antigen (PSA) blood test and a prostate ultrasound examination. An abnormally high level of PSA can indicate prostate cancer or other prostate diseases such as benign prostatic hypertrophy or prostatitis. The transrectal sonography is an important diagnostic ultrasound procedure in determining whether there is any benign enlargement of the prostate or any abnormal nodules. The imaging is performed with a rectal probe, yielding high resolution. High resolution 3D ultrasound provides reliable and accurate determination of the size and the location of cancer. Additionally, ultrasound elastography is a technique in development to improve the specificity and sensitivity of cancer detection. Ultrasound is also used to detect whether cancerous tissue is still only within the prostate or whether it has begun to spread out and to guide a diagnostic biopsy or ultrasound therapy. See also Brachytherapy, and High Intensity Focused Ultrasound. ![]() Further Reading: News & More:
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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.
• ![]() 'The perfect practice system... The SD 240E is a compact and ergonomically designed system, standard equipped with two probe connectors. The user has a choice out of more than 12 linear, curved and annular phased array probes which can be used with this perfect office unit. Total Image Focus and cine memory technology are just the icing on the cake.' This product is not available in the US, Australia, or New Zealand from Philips Medical Systems.' Specifications for this system will be available soon. • ![]() 'SonoSite began as a division of ATL Ultrasound in 1997 focused on the development of all-digital, handheld ultrasound devices. In February 1995, the U.S. Defense Advanced Research Project Administration (DARPA) had awarded to ATL a two-year matching grant to develop a highly portable ultrasound device for use on the battlefield or in natural or man-made disasters to diagnose victims of severe trauma. This program culminated with a prototype in October 1998. ATL spun off SonoSite as a public company on April 6, 1998.' In March 2012 Fujifilm Holdings completes the acquisition of SonoSite. Ultrasound Systems:
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