6533b85cfe1ef96bd12bc765

RESEARCH PRODUCT

Intraluminal Doppler-sonography: a new device for data analysis and its in vitro test

Raimund ErbelRüdiger BrenneckeW. Van SeelenJ. MeyerTh. Roth

subject

Physics12-bitbusiness.industryAcoustics8-bitImpulse (physics)Converterssymbols.namesakeDoppler sonographyData acquisitionPersonal computersymbolsTelecommunicationsbusinessDoppler effect

description

Summary form only given. A special data acquisition unit has been developed which allows to process on-line not only the mean-phasic Doppler shift signal but also to analyze the spectral contents and the received A-mode signal. The probe consists of a 3f-catheter which is activated by a pulsed transmitter-receiver (Millar). The carrier frequency is 20 MHz and the impulse repetition rate is 62.5 kHz. Two modular A/D converters are used. One digitizes directly the Doppler shift frequencies in the range less than 20 kHz (sampling rate 100 kHz, resolution 12 bit); the other digitizes the RF-signal (sampling rate 200 MHz, resolution 8 bit). For further processing, data are transferred via separate bus systems to an IBM/AT compatible personal computer. An in vitro model has been developed to test the dependence of received signals on stenoses and different flow vehicles. >

yearjournalcountryeditionlanguage
2002-12-04[1990] Proceedings Computers in Cardiology
https://doi.org/10.1109/cic.1990.144288