UltraSound - Technology Information PortalSunday, 24 September 2017
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Analog Output SignalMRI Resource Directory:
 - UltraSound Physics -
 
The analog output signal is voltage output corresponding to the parameter measured by a device. The produced signal is calibrated by a scaling factor.
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Analog to Digital ConverterMRI Resource Directory:
 - Devices Machines Scanners Systems -
 
(ADC) A system that receives analog input data and produces digital values at its output. Analog to digital converters are used by the ultrasound scanner to convert the received signal into a format more compatible with the computer systems.
Ultrasound front-end-systems as well as many others sophisticated electronic systems use these analog signal processing components in connection with e.g., low-noise amplifier (LNA), and time gain compensation amplifier (TGC) as key elements in determining the overall system performance.
See also Digital to Analog Converter, and Digitization.
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 Further Reading:
  Basics:
Defining and Testing Dynamic Parameters in High-Speed ADCs, Part 1Open this link in a new window
Tuesday, 13 February 2001   by www.maxim-ic.com    
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AnechoicMRI Resource Directory:
 - UltraSound Physics -
 
Anechoic areas are regions without internal echoes (echo free). Cysts or fluid filled regions are anechoic and may demonstrate enhanced echoes posterior to the fluid.
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  News & More:
Ultrasound appearances of pelvic inflammatory disease. Patient A: Hydrosalpinx. Patient B: Pyosalpinx. Patient C: Tubo-ovarian abscess.Open this link in a new window
   by rad.usuhs.mil    
AngiographyMRI Resource Directory:
 - Vascular -
 
Angiography means the imaging of veins and arteries. Without the need of X-rays, vessels and their surrounding tissue can be depicted with different methods including Doppler techniques to measure blood flow.
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• View the DATABASE results for 'Angiography' (9).Open this link in a new window.

Angle of IncidenceMRI Resource Directory:
 - UltraSound Physics -
 
(Doppler look angle) The angle of incidence is the angle at which the ultrasound beam strikes an interface, or the angle at which the Doppler beam intersects the blood flow. Doppler signals are best obtained at angles of 60° or less.
See also Snells Law.
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Contrast Agents - Ultrasound Gel - Renal - Manufacturers - DICOM - UltraSound Physics
 
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