Transcription of Signal Processing Overview of Ultrasound Systems for ...
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Signal Processing Overview of Ultrasound Systems for ...
WhitePaperSPRAB12 November2008 SignalProcessingOverviewofUltrasoundSyst emsforMedicalImagingMurtazaAli, :thefrontend(thatincludestransmission,re ception,anddigitizationofultrasoundsigna l),followedbybeamforming(tofocusonaparti cularscanline),themidend(thatperformsdem odulation,envelopedetection,andcompressi on),andfinally,thebackend(thatperformsva riousimageenhancementandrenderingfunctio ns).TheprocessingrequiredinDopplermodeis describedand,finally,theprocessingandiss uesrelatedto3 ,obstetrics,gynecology,abdominalimaging, , ,( ,inguidinginterventionalprocedures). ,digitalsignalprocessors(DSP) (SOC) [20]. , (DAS) , ,whichiscomposedofimageenhancement,noise reduction, , ,Section8brieflyintroducesthebasicconcep tsusedfor3 November2008 SubmitDocumentationFeedback2 UltrasoundSystem:BasicConceptsRegion of InterestScan LinesFocal ,bynomeans, , ,ultrasoundsystemsoperateinthe2 MHzto20 MHzfrequencyrange,althoughsomesystemsare approaching40 MHzforharmonicimaging[3].
The system processing for B-mode imaging can be roughly divided into three components: the front end (that includes transmission, reception, and digitization ... (VCA) before being sampled by analog-to-digital converters (ADC). The VCA is configured so that the gain profile being applied to the received signal is a function of
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