Color flow mapping

被引:58
作者
Ferrara, K [1 ]
DeAngelis, G [1 ]
机构
[1] UNIV VIRGINIA, DEPT RADIOL, CHARLOTTESVILLE, VA 22908 USA
关键词
Doppler; color flow mapping; contrast agents; second harmonic imaging; wall filters; wideband estimation techniques; narrowband estimation techniques; flow discrimination; aliasing; artifacts;
D O I
10.1016/S0301-5629(96)00216-5
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Color flow mapping systems have become widely used in the short time since their development. These systems overlay a pseudo-color velocity map upon the gray-scale two-dimensional image. Between 4 and 16 pulses are directed to each line-of-sight, and this requirement reduces the frame rate in comparison with the gray-scale image. Other limitations of color flow mapping include its ability to estimate only the velocity toward or away from the transducer and an increase in the variance in comparison with spectral Doppler. Potential artifacts include aliased velocities and the detection of how in hypoechoic or hyperechoic nonvascular structures. Clinical applications include cardiology, studies of the abdominal and peripheral vasculature, evaluation of organ perfusion and the differentiation of tumors. Most current systems use narrowband estimators that examine a fixed sample volume and detect a change in phase between two pulses. Wideband estimators that can track red blood cells in two or three dimensions are under evaluation. Narrowband estimators, including the autocorrelator, the short Fourier transform and second order autoregressive filters, are compared with wideband estimators including cross-correlation, sum-absolute-difference and the wideband maximum likelihood estimator. Because the intensity of blood echoes is far smaller than echoes from surrounding tissue, high pass filters have been developed that can reject the larger signal from tissue using the return from a small number of pulses. Other areas of research include strategies for how estimation with contrast agents, three-dimensional color flow mapping and power Doppler flow mapping. (C) 1997 World Federation for Ultrasound in Medicine & Biology.
引用
收藏
页码:321 / 345
页数:25
相关论文
共 78 条
[51]   PERIVASCULAR COLOR ARTIFACT - PATHOLOGIC SIGNIFICANCE AND APPEARANCE ON COLOR DOPPLER US IMAGES [J].
MIDDLETON, WD ;
ERICKSON, S ;
MELSON, GL .
RADIOLOGY, 1989, 171 (03) :647-652
[52]  
MITCHELL DG, 1990, J ULTRAS MED, V9, P255
[53]  
MITCHELL DG, 1990, RADIOLOGY, V177, P1
[54]   FEMORAL-ARTERY PSEUDOANEURYSM - DIAGNOSIS WITH CONVENTIONAL DUPLEX AND COLOR DOPPLER US [J].
MITCHELL, DG ;
NEEDLEMAN, L ;
BEZZI, M ;
GOLDBERG, BB ;
KURTZ, AB ;
PENNELL, RG ;
RIFKIN, MD ;
VILARO, M ;
BALTAROWICH, OH .
RADIOLOGY, 1987, 165 (03) :687-690
[55]   A STOCHASTIC-MODEL OF THE BACKSCATTERED DOPPLER ULTRASOUND FROM BLOOD [J].
MO, LYL ;
COBBOLD, RSC .
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1986, 33 (01) :20-27
[56]   AN INFINITE GATE PULSE DOPPLER [J].
NOWICKI, A ;
REID, JM .
ULTRASOUND IN MEDICINE AND BIOLOGY, 1981, 7 (01) :41-50
[57]   TOWARDS AN IDEAL BLOOD ANALOG FOR DOPPLER ULTRASOUND PHANTOMS [J].
OATES, CP .
PHYSICS IN MEDICINE AND BIOLOGY, 1991, 36 (11) :1433-1442
[58]   VECTOR DOPPLER - ACCURATE MEASUREMENT OF BLOOD VELOCITY IN 2 DIMENSIONS [J].
OVERBECK, JR ;
BEACH, KW ;
STRANDNESS, DE .
ULTRASOUND IN MEDICINE AND BIOLOGY, 1992, 18 (01) :19-31
[59]  
PETERSON RB, 1993, COMP IIR INITIALIZAT
[60]   3-DIMENSIONAL COLOR DOPPLER IMAGING [J].
PICOT, PA ;
RICKEY, DW ;
MITCHELL, R ;
RANKIN, RN ;
FENSTER, A .
ULTRASOUND IN MEDICINE AND BIOLOGY, 1993, 19 (02) :95-104