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8. *ADVERTISEMENT* BioAcoustic technologies from Siemens Healthineers

Over the last two years, Siemens Healthineers has introduced a new portfolio of ultrasound systems designed to optimise image quality with no compromise. 


An important design goal for the ACUSON Sequoia™ system was to introduce an ultra-premium ultrasound system that meets and exceeds demanding requirements in key critical clinical capabilities: 

Breakthrough B-mode, colour flow Doppler, and spectral Doppler image quality to reduce operator dependence and provide consistently high exam quality across operators in an ultrasound lab or department.  The result being a user experience to enhance productivity in very busy labs. 




InFocus Coherent Image Formation 

InFocus coherent image formation automatically focuses the image at all depths without compromise in frame rate and exploits high beamformer output capacity, which increases image uniformity compared to prior systems. This secondary beamforming enabled with InFocus, physics-based delay, phase and amplitude corrections can be made across transmit events to significantly sharpen the image and improve spatial and temporal resolution beyond what is typical for a given transducer frequency. 


AutoTEQ Technology 

The image former of the ACUSON Sequoia system also provides significant benefits to the Doppler workflow. Its new AutoTEQ™ tissue  


equalization technology automatically optimizes relevant parameters so that operator adjustments are kept to a minimum.  

Several acquisition parameters such as gain, velocity scale, wall filter, AutoTEQ and other post-processing parameters can now be adjusted on a frozen sweep before images are saved to PACS. 



AutoTEQ Off             AutoTEQ On 


Fig.1 Workflow automation with Doppler AutoTEQ reduces user interaction and improves exam consistency. 


Auto Flash Artifact Suppression 

Auto Flash Artifact Suppression is a Siemens Healthineers proprietary technology that detects and prevents artifacts associated with transducer and patient motion and enhances colour imaging sensitivity when no motion is detected. It is integrated into the platform architecture of the ACUSON Sequoia system and, as such, can support higher image quality and greater diagnostic certainty without adding additional steps to the clinician’s workflow. 




Fig.2 Conventional colour Doppler image with motion artifacts (top).  Same patient (bottom) with Auto Flash Artifact Suppression technology. 


Slow flow State 

Colour Doppler technology can allow a user to determine presence or absence of blood flow as well as direction information and velocity.   However, small, weaker signals can be lost from the surrounding signal clutter or rejected as noise by filters within the system which remove this information altogether. Slow flow uses an intelligent algorithm combined with smart system filters to detect and separate the weaker signals offering PRF between 250 and 800 Hz. Once detected, these signals are amplified and used to help improve smaller, low flow vessel visualization, as well as visualize these challenging vessels further into the tissue being imaged. 




Fig 3. Image of the kidney using conventional colour Doppler (top) and Slow flow Doppler (bottom). 


Deep Vascular Transducer 

The new 7L2 single crystal linear deep vascular transducer is designed for peripheral vascular imaging cases with low Doppler frequencies for high-flow states and sensitivity at depths up to 20cm.