Title :
Deep vein thrombosis detection
Author :
Berrios, J.C. ; Pedersen, P.C.
Author_Institution :
Dept. of Electr. Eng., Worcester Polytech. Inst., MA, USA
Abstract :
A method for measuring vessel compliance for the purpose of localizing venous thrombi is presented. Vessel compliance can be determined by measuring vessel diameter variations due to changes in transmural pressure. A mechanical model was implemented using a latex tube in a water-filled enclosure with rigid walls. This implementation allows variations of the pressure inside the enclosure. To determine tube compliance, a low-frequency (1-20-Hz) sinusoidal vibration is applied to a moving plate. The blood clot is simulated by a plexiglass cylinder. A pulse-echo ultrasound system together with a differential correlation receiver (DCR) measures the diameter changes in the tube. Results using this mechanical model show negligible diameter variations in the tube segment containing the clot. Conversely, diameter variations are clearly measurable in the absence of the clot
Keywords :
biomechanics; biomedical measurement; biomedical ultrasonics; diameter measurement; elasticity; ultrasonic measurement; vibrations; 1 to 20 Hz; blood clot; latex tube; localizing venous thrombi; mechanical model; moving plate; pulse-echo ultrasound; rigid walls; sinusoidal vibration; transmural pressure; vessel compliance; vessel diameter variations; water-filled enclosure; Coagulation; Frequency; Pressure measurement; Pulse measurements; Thrombosis; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement; Veins; Vibration measurement;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171631
