Title :
Feasibility study of blood velocity vector estimation using three types of transducer
Author :
Hyungjoon Lim ; Hwan Shim ; Youngtae Kim ; Byeonggeun Cheon
Author_Institution :
Digital Media & Commun. R&D Center, Samsung Electron. Co., Ltd., Suwon, South Korea
Abstract :
Ultrasound color Doppler imaging has been a useful technique for obtaining vascular blood flow information. The conventional method, however, suffers from angle dependency when the blood flow is normal to the ultrasound beam direction so that it is difficult to visualize the blood flow. To overcome this angle dependency, various vector Doppler imaging methods with multiple transmit and receive sub-apertures have been proposed and showed an angle independent vessel flow information. However, most of them are evaluated on a linear array transducer. This paper evaluates a vector Doppler algorithm consisting of one transmit (TX) sub-aperture and two receive (RX) sub-apertures based on the convex and phased array transducer. Vessel flow velocity magnitudes and directions obtained by the vector Doppler using the convex and phased array show, for convex transducer mean direction error of 8.6843 degrees and 0.3860 m/s of mean velocity magnitude error and for phased array 16.1693 degrees and 0.0247 m/s mean errors respectively. These result indicate that convex and phased array also provide an reasonable vessel velocity magnitude and flow direction comparing to the vessel information of linear transducer which are errors of 2.9440 degrees and 0.1710 m/s respectively.
Keywords :
Doppler effect; biomedical transducers; biomedical ultrasonics; blood vessels; haemodynamics; vectors; blood velocity vector estimation; convex array transducer; linear array transducer; phased array transducer; receive subaperture; transmit subaperture; ultrasound beam direction; ultrasound color Doppler imaging; vascular blood flow information; vascular blood flow visualization; vector Doppler algorithm; vector Doppler imaging method; vessel flow velocity direction; vessel flow velocity magnitude; Apertures; Arrays; Doppler effect; Geometry; Transducers; Ultrasonic imaging; Vectors; Vector Doppler; ultrasound; vessel flow;
Conference_Titel :
Ultrasonics Symposium (IUS), 2012 IEEE International
Conference_Location :
Dresden
Print_ISBN :
978-1-4673-4561-3
DOI :
10.1109/ULTSYM.2012.0085