In-vivo studies of new vector velocity and adaptive spectral estimators in medical ultrasound

Danish Medical Bulletin

Volumn 57, Issue 5, 2010, Pages 4-

  Hansen, Kristoffer Lindskov ^a  

^a University of Copenhagen   (Denmark)

Author keywords

[No Author keywords available]

Indexed keywords

ADULT; AMPLITUDE MODULATION; ARTICLE; BLOOD FLOW VELOCITY; BLOOD RHEOLOGY; COMPUTER ASSISTED TOMOGRAPHY; CONTROLLED STUDY; DIGITAL SUBTRACTION ANGIOGRAPHY; DOPPLER FLOWMETRY; ELECTROMAGNETIC FLOWMETER; FEMALE; HUMAN; HUMAN EXPERIMENT; IN VIVO STUDY; INTERMETHOD COMPARISON; LASER DOPPLER FLOWMETRY; MAGNETIC RESONANCE ANGIOGRAPHY; MALE; NORMAL HUMAN; NUCLEAR MAGNETIC RESONANCE IMAGING; OSCILLATION; PLETHYSMOGRAPHY; POSITRON EMISSION TOMOGRAPHY; QUALITATIVE ANALYSIS; QUANTITATIVE ANALYSIS; SINGLE PHOTON EMISSION COMPUTER TOMOGRAPHY; SPECTRAL SENSITIVITY; ULTRASOUND; VALIDATION PROCESS; WAVEFORM;

EID: 77954568164     PISSN: 16039629     EISSN: 16039629     Source Type: Journal    
DOI: None     Document Type: Article

References (147)

1. Jensen JA, Holm O, Jensen LJ, Bendsen H, Pedersen HM, Salomonsen K, et al. Experimental ultrasound system for real-time synthetic imaging. IEEE Ultrason Symp 1999;1595-9.
2. Jensen JA, Holm O, Jensen LJ, Bendsen H, Nikolov S, Tomov BG, et al. Ultrasound research scanner for real-time synthetic aperture image acquisition. IEEE Trans Ultrason Ferroelec Freq Contr 2005;52(5):881-91.
3. Caro CG, Pedley TJ, Schroter RC, Seed WA. The mechanics of the circulation. Oxford: Oxford University Press; 1978. 4. Griffiths PD, Hoggard N, Dannels WR, Wilkinson ID. In vivo measurement of cerebral blood flow: a review of methods and applications. Vasc Med 2001;6(1):51-60.
4. Masood S, Yang G-Z. Blood Flow Measurement. Encyclopedia of Biomedical Engineering. John Wiley & Sons, Inc.; 2005.
5. Headley JM. Invasive hemodynamic monitoring: physiological principles and clinical applications. Irvine: 2002.
6. Miles KA. Perfusion imaging with computed tomography: brain and beyond. Eur Radiol 2006 Nov;16 Suppl 7:M37-M43.
7. Ota H, Takase K, Rikimaru H, Tsuboi M, Yamada T, Sato A, et al. Quantitative vascular measurements in arterial occlusive disease. Radiographics 2005 Sep;25(5):1141-58.
8. Zaharchuk G. Theoretical basis of hemodynamic MR imaging techniques to measure cerebral blood volume, cerebral blood flow, and permeability. AJNR Am J Neuroradiol 2007 Nov;28(10):1850-8.
9. Turner J, Belch JJ, Khan F. Current concepts in assessment of microvascular endothelial function using laser Doppler imaging and iontophoresis. Trends Cardiovasc Med 2008 May;18(4):109-16.
10. Joyner MJ, Dietz NM, Shepherd JT. From Belfast to Mayo and beyond: the use and future of plethysmography to study blood flow in human limbs. J Appl Physiol 2001;91:2431-41.
11. Nair DG. About being BOLD. Brain Res Brain Res Rev 2005 Dec 15;50(2):229-43.
12. van der Geest RJ, Rob J, Niezen AR, van der Wall EE, de Roos A, Rieber JHC. Automated Measurement of Volume flow in the Ascending Aorta using MR Velocity Maps: Evaluation of Inter- and Intraobserver Variability in Healthy Volunteers. J Comput Assist Tomogr 1998;22:904-11.
13. Split A, Box FMA, van der Geest, Reiber RJ, Kunz P, Kamper AM, et al. Reproducibility of total Cerebral Blood Flow Measurements Using Phase Contrast Magnetic Resonance Imaging. J Magn Reson Imaging 2002;16:1-5.
14. Oktar SO, Yucel C, Karaosmanoglu D, Akkan K, Ozdemir H, Tokgoz N, et al. Blood-flow volume quantification in internal carotid and vertebral arteries: Comparison of 3 different ultrasound techniques with phase-contrast MR imaging. AJNR Am J Neuroradiology 2006;27(2):363-9.
15. Ho SS, Chan YL, Yeung DK. Blood flow volume quantification of cerebral ischemia: comparison of three noninvasive imaging techniques of carotid and vertebral arteries. AJR Am J Roentgenol 2002;178:551-6.
16. Bakker CJ, Kouwenhoven M, Hartkamp MJ. Accuracy and precision of time-averaged flow as measured by nontriggered 2D phase-contrast MR angiography, a phantom evaluation. Magn Reson Imaging 1995;13:959-65.
17. Kondo C, Caputo GR, Semelka R, Foster E, Shimakawa A, Higgins CB. Right and left ventricular stroke volume measurements with velocity-encoded cine MR imaging: in vitro and in vivo validation. AJR Am J Roentgenol 1991 Jul;157(1):9-16.
18. Stahlberg F, Ericsson A, Nordell B, Thomsen C, Henriksen O, Persson BR. MR imaging, flow and motion. Acta Radiol 1992 May;33(3):179-200.
19. Graves MJ. Magnetic resonance angiography. Br J Radiol 1997 Jan;70:6-28.
20. Jensen JA. Medical ultrasound imaging. Prog Biophys Mol Biol 2007 Jan;93(1-3):153-65.
21. Jensen JA. Estimation of Blood velocities using ultrasound: A signal processing approach. New York: Cambridge University Press; 1996.
22. Tola M, Yurdakul M. Effect of Doppler angle in diagnosis of internal carotid artery stenosis. J Ultrasound Med 2006 Sep;25(9):1187-92.
23. Hoskins PR. Peak velocity estimation in arterial stenosis models using colour vector Doppler. Ultrasound Med Biol 1997;23(6):889-97.
24. Tortoli P, Michelassi V, Bambi G, Guidi F, Righi D. Interaction between secondary velocities, flow pulsation and vessel morphology in the common carotid artery. Ultrasound Med Biol 2003 Mar;29(3):407-15.
25. Ford MD, Xie YJ, Wasserman BA, Steinman DA. Is flow in the common carotid artery fully developed? Physiol Meas 2008 Nov;29(11):1335-49.
26. Hansen KL, Udesen J, Thomsen C, Jensen JA, Nielsen MB. In vivo validation of a blood vector velocity estimator with MR angiography. IEEE Trans Ultrason Ferroelec Freq Control 2009 Jan;56(1):91-100.
27. Frazin LJ, Lanza G, Vonesh M, Khasho F, Spitzzeri C, McGee S, et al. Functional chiral asymmetry in descending thoracic aorta. Circulation 1990 Dec;82(6):1985-94.
28. Lee KL, Doorly DJ, Firmin DN. Numerical simulations of phase contrast velocity mapping of complex flows in an anatomically realistic bypass graft geometry. Med Phys 2006 Jul;33(7):2621-31.
29. Steinman DA, Thomas JB, Ladak HM, Milner JS, Rutt BK, Spence JD. Reconstruction of carotid bifurcation hemodynamics and wall thickness using computational fluid dynamics and MRI. Magnet Reson Med 2002;47(1):149-59.
30. Zhao SZ, Xu XY, Hughes AD, Thom SA, Stanton AV, Ariff B, et al. Blood flow and vessel mechanics in a physiologically realistic model of a human carotid arterial bifurcation. J Biomech 2000;33(8):975-84.
31. Zhao SZ, Papathanasopoulou P, Long Q, Marshall I, Xu XY. Comparative study of magnetic resonance imaging and image- based computational fluid dynamics for quantification of pulsatile flow in a carotid bifurcation phantom. Ann Biomed Eng 2003;31(8):962-71.
32. Krams R, Bambi G, Giudi F, Helderman F, van der Steen AFW, Tortoli P. Effect of Vessel Curvature on Doppler Derived Velocity Profiles and Fluid Flow. Ultrasound Med Biol 2005;31:663-71.
33. Fei DY, Liu DD, Fu CT, Makhoul RG, Fisher MR. Feasibility of angle independent Doppler color imaging for in vivo application: Preliminary study on carotid arteries. Ultrasound Med Biol 1997;23(1):59-67.
34. Phillips DJ, Beach KW, Primozich J, Strandness DE, Jr. Should results of ultrasound Doppler studies be reported in units of frequency or velocity? Ultrasound Med Biol 1989;15(3):205-12.
35. Udesen J, Nielsen MB, Nielsen KR, Jensen JA. Examples of In Vivo Blood vector velocity Estimation. Ultrasound Med Biol 2007;33(4):541-8.
36. Cheng C, Tempel D, van Harperen R, van der Baan A, Grosveld F, Daermen M, et al. Atherosclerotic lesion size and vulnerability are determined by patterns of fluid shear stress. Circulation 2006;113(23):2744-53.
37. Richter Y, Edelman ER. Cardiology is flow. Circulation 2006;113(23):2679-82.
38. Vera N, Steinman DA, Ethier CR, Johnston KW, Cobbold RS. Visualization of complex flow fields, with application to the interpretation of colour flow Doppler images. Ultrasound Med Biol 1992;18(1):1-9.
39. Birchall D, Zaman A, Hacker J, Davies G, Mendelow D. Analysis of haemodynamic disturbance in the atherosclerotic carotid artery using computational fluid dynamics. Eur Radiol 2006;16(5):1074-83.
40. Hoskins PR. A review of the measurement of blood velocity and related quantities using Doppler ultrasound. Proc Inst Mech Eng [H ] 1999;213(5):391-400.
41. Walker A, Olsson E, Wranne B, Ringqvist I, Ask P. Accuracy of spectral Doppler flow and tissue velocity measurements in ultrasound systems. Ultrasound Med Biol 2004 Jan;30(1):127-32.
42. Deane CR, Markus HS. Colour velocity flow measurement: in vitro validation and application to human carotid arteries. Ultrasound Med Biol 1997;23(3):447-52.
43. Stewart SF. Effects of transducer, velocity, Doppler angle, and instrument settings on the accuracy of color Doppler ultrasound. Ultrasound Med Biol 2001 Apr;27(4):551-64.
44. Gaitini D, Soudack M. Diagnosing carotid stenosis by Doppler sonography: state of the art. J Ultrasound Med 2005 Aug;24(8):1127-36.
45. Ranke C, Creutzig A, Becker H, Trappe H-J. Standardization of Carotid Ultrasound: A Hemodynamic Method to Normalize for Interindividual and Interequipment Variability. Stroke 1999;30:402-6.
46. Honish C, Sadanand V, Fladeland D, Chow V, Pirouzmand F. The reliability of ultrasound measurements of carotid stenosis compared to MRA and DSA. Can J Neurol Sci 2005;32(4): 465-471:-471
47. Paivansalo MJ, Suramo I, Merikanto J, Lindholm EL. Interobserver, interequipment and intersubject variability of echo- Doppler examination of the common carotid and vertebral arteries. Eur J Ultrasound 1998 Apr;7(2):145-51.
48. Henry-Feugeas M, Kilic Genauzeau I, Ayme N, Schouman-Claeys E. Variability of ultrasonography velocity assessment of the carotid arteries. J Radiol 2000 Apr;81(4):445-9.
49. Daigle RE, Miller CW, Histand MB, McLeod FD, Hokanson DE. Nontraumatic aortic blood flow sensing by use of an ultrasonic esophageal probe. J Appl Physiol 1975;38:1153-60.
50. Fox MD. Multiple crossed-beam ultrasound Doppler velocimetry. IEEE Trans Son Ultrason 1978;25:281-6.
51. Trahey GE, Allison JW, Ramm OT. Angle independent ultrasonic detection of blood flow. IEEE Trans Biomed Eng 1987;34(12):965-7.
52. Bohs LN, Geiman BJ, Anderson ME, Gebhart SC, Trahey GE. Speckle tracking for multi-dimensional flow estimation. Ultrasonics 2000 Mar;38(1-8):369-75.
53. Newhouse VL, Censor D, Vontz T, Cisneros JA, Goldberg BB. Ultrasound Doppler probing of flows transverse with respect to beam axis. IEEE Trans Biomed Eng 1987;34:779-88.
54. Bonnefous O. Measurement of the complete (3D) velocity vector of blood flows. IEEE Ultrason Symp 1988;795-9.
55. Dunmire KW, Beach KW, Labs K-H, Plett M, Strandness DE. Cross-beam vector Doppler ultrasound for angle independent velocity measurements. Ultrasound Med Biol 2000;26:1213-35.
56. Overbeck JR, Beach KW, Strandness DE, Jr. Vector Doppler: accurate measurement of blood velocity in two dimensions. Ultrasound Med Biol 1992;18(1):19-31.
57. Kruskal JB, Newman PA, Sammons LG, Kane RA. Optimizing Doppler and color flow US: Application to hepatic sonography. Radiographics 2004;24(3):657-75.
58. Pozniak MA, Zagzebski JA, Scanlan KA. Spectral and color Doppler artifacts. Radiographics 1992 Jan;12(1):35-44.
59. Ferrara K, DeAngelis G. Color flow mapping. Ultrasound Med Biol 1997;23(3):321-45.
60. Stoica P, Moses R. Spectral analysis of signals. Upper Saddle River, N.J.: Prentice Hall; 2005.
61. Coats AJS, Murphy C, Conway J, Sleight P. Validation of the beat to beat measurement of blood velocity in the human ascending aorta by a new high temporal resolution Doppler ultrasound spectral analyser. Br Heart J 1992 Aug;68(8):223-9.
62. Tanaka N, Ohtsuki S. Estimation of Doppler shift frequency using selected phase information for high frame rate color flow mapping. J Med Ultrasonics 2004;31(1):5-12.
63. Udesen J, Gran F, Nielsen MB, Jensen JA. A Frequency Splitting Method for CFM Imaging. IEEE Ultrason Symp 2006;2019-22.
64. Gran F, Udesen J, Nielsen MB, Jensen JA. Coded ultrasound for blood flow estimation using subband processing. IEEE Trans Ultrason Ferroelec Freq Contr 2009;55(10):2211-20.
65. Oddershede N, Gran F, Jensen JA. Multi-frequency encoding for fast color flow or quadroplex imaging. IEEE Trans Ultrason Ferroelec Freq Control 2008 Apr;55(4):778-86.
66. Jensen JA. Spectral velocity estimation in ultrasound using sparse data sets. J Acoust Soc Am 2006;120(1):211-20.
67. Li J, Stoica P. An adaptive filtering approach to spectral estimation and SAR imaging. IEEE Trans Signal Process 1996;44(6):1469-84.
68. Herment A, Giovannelli JF. An adaptive approach to computing the spectrum and mean frequency of Doppler signals. Ultrason Imaging 1995 Jan;17(1):1-26.
69. Vaikus PJ, Cobbold RSC. A comparative study and assessment of Doppler ultrasound spectral estimation techniques, Part 1: Estimation methods. Ultrasound Med Biol 1988;14:661-72.
70. Vaikus PJ, Cobbold RSC, Johnston KW. A comparative study and assessment of Doppler ultrasound spectral estimation techniques, Part 2: Methods and results. Ultrasound Med Biol 1988;14:673-88.
71. Jensen JA, Munk P. A new method for estimation of velocity vectors. IEEE Trans Ultrason Ferroelec Freq Contr 1998;45:837-51.
72. Jensen JA. A new estimator for vector velocity estimation. IEEE Trans Ultrason Ferroelec Freq Contr 2001;48:886-94.
73. Udesen J, Jensen JA. Investigation of transverse oscillation method. IEEE Trans Ultrason Ferroelec Freq Contr 2006;53:959-71.
74. Jensen JA, Bjerngaard R. Directional velocity estimation using focusing along the flow direction: II: Experimental investigation. IEEE Trans Ultrason Ferroelec Freq Contr 2003;873-80.
75. Jensen JA. Directional velocity estimation using focusing along the flow direction: I: Theory and simulation. IEEE Trans Ultrason Ferroelec Freq Contr 2003;857-72.
76. Jensen JA. Field: A program for simulating ultrasound systems. Med Biol Eng Comp, vol 10th Nordic-Baltic Conference on Biomedical Imaging 1996;4:351-3.
77. Jensen JA, Svendsen NB. Calculation of pressure fields from arbitrarily shaped, apodized, and excited ultrasound transducers. IEEE Trans Ultrason Ferroelec Freq Contr 1992;39:262-7.
78. Holfort IK, Kortbek J, Jensen JA. In-vivo Vector Velocity Imaging Using Directional Cross-Correlation. IEEE Ultrason Symp 2006;2023-6.
79. Jensen JA. Velocity vector estimation in synthetic aperture flow and B-mode imaging. Proc IEEE Int Symp Biomed Imaging: from nano to macro 2004;1:33-6.
80. Jensen JA, Nikolov S. Transverse flow imaging using synthetic aperture directional beamforming. IEEE Ultrason Symp 2002;2:1488-92.
81. Jensen JA, Oddershede N. Estimation of velocity vectors in synthetic aperture ultrasound imaging. IEEE Trans Med Imag 2006;25:1637-44.
82. Nikolov S, Jensen JA. In-Vivo Synthetic aperture flow Imaging in Medical Ultrasound. IEEE Trans Ultrason Ferroelec Freq Contr 2003;50:848-56.
83. Oddershede N, Jensen JA. Experimental investigation of synthetic aperture flow angle estimation. Proc SPIE Med Imag 2005;5750:417-26.
84. Oddershede N, Jensen JA. Effects influencing focusing in synthetic aperture vector flow imaging. IEEE Trans Ultrason Ferroelec Freq Contr 2007;54:1811-25.
85. Udesen J, Gran F, Hansen KL, Jensen JA, Thomsen C, Nielsen MB. High frame-rate blood vector velocity imaging using plane waves: simulations and preliminary experiments. IEEE Trans Ultrason Ferroelec Freq Contr 2008;55(8):1729-43.
86. Udesen J, Gran F, Hansen KL, Jensen JA, Nielsen MB. Fast blood vector velocity imaging: Simulations and preliminary in vivo results. IEEE Ultrason Symp 2007;1005-8.
87. Friemel BH, Bohs LN, Trahey GE. Relative performance of two-dimensional speckle-tracking techniques: normalized DANISH MEDICAL BULLETIN 22 correlation, non-normalized correlation and sum-absolutedifference. IEEE Ultrason Symp 1995;2:1481-4.
88. Stoica P, Moses R. Introduction to spectral analysis. Upper Saddle River, N.J: Prentice Hall; 1997.
89. Gran F, Jakobsson A, Jensen JA. Adaptive spectral Doppler estimation. IEEE Trans Ultrason Ferroelec Freq Contr 2009;56(4):700-14.
90. Gran F, Jakobsson A, Jensen JA. Adaptive blood velocity estimation in medical ultrasound. Proc IEEE ICASSP 2007;1:293-6.
91. Stoica P, Jakobsson A, Li J. Matched-filterbank interpretation of some spectral estimators. Signal Processing 1998;66:45-59.
92. Proakis JG, Manolakis DG. Digital signal processing: Principles, algorithms and applications. 4. ed. Upper Saddle River, N.J.: Prentice Hall; 2007.
93. Chenevert TL, Fechner KP, Gelblum DY. Improvements in MR angiography using phase-corrected data sets. Magn Reson Med 1989 Apr;10(1):38-49.
94. Tublin ME, Bude RO, Platt JF. Review. The resistive index in renal Doppler sonography: where do we stand? AJR Am J Roentgenol 2003 Apr;180(4):885-92.
95. Altman DG. Practical statistics for medical research. London: Chapmann & Hall/CRC; 1991.
96. Landis JR, Koch GG. The measurement of observer agreement for categorical data. Biometrics 1977;33:159-74.
97. Fleiss JL. Measuring nominal scale agreement among many raters. Psychol Bull 1971;76(5):378-82.
98. Kim WY, Poulsen JK, Terp K, Staalsen NH. A new Doppler method for quantification of volumetric flow: in vivo validation using color Doppler. J Am Coll Cardiol 1996 Jan;27(1):182-92.
99. Kripfgans OD, Rubin JM, Hall AL, Gordon MB, Fowlkes JB. Measurement of volumetric flow. J Ultrasound Med 2006 Oct;25(10):1305-11.
100. Jenni R, Matthews F, Aschkenasy SV, Lachat M, van Der LB, Oechslin E, et al. A novel in vivo procedure for volumetric flow measurements. Ultrasound Med Biol 2004 May;30(5):633-7.
101. Soustiel JF, Levy E, Zaaroor M, Bibi R, Lukaschuk S, Manor D. A new angle-independent Doppler ultrasonic device for assessment of blood flow volume in the extracranial internal carotid artery. J Ultrasound Med 2002 Dec;21(12):1405-12.
102. Rothoerl RD, Schebesch KM, Woertgen C, Brawanski A. Ultrasonic blood flow volume assessment in the extracranial internal carotid artery in arteriovenous malformations. Neurol Res 2005 Mar;27(2):209-11.
103. Shuping GE, Liping BU, Honghai Z, Schelbert E, Disterhoft M. A Real-time 3-dimensional Digital Doppler Method for Measurement for Flow Rate and Volume Thorugh Mitral Valve in Children: A Validation Study Caompared With Magnetic Resonance Imaging. J Am Soc Echocardiogr 2005;18:1-7.
104. Forsberg F, Stein AD, Lui J, Deng X, Ackerman W, Herzog D, et al. Validating volume Flow Measurements from a Novel Semiautomated Four-dimensional Doppler Ultrasound Scanner. Acad Radiol 2006;13(10):1204-10.
105. Schrank E, Phillips DJ, Moritz WE, Strandness DE, Jr. A triangulation method for the quantitative measurement of arterial blood velocity magnitude and direction in humans. Ultrasound Med Biol 1990;16(5):499-509.
106. Steel R, Ramnarine KV, Davidson F, Fish PJ, Hoskins PR. Angle- independent estimation of maximum velocity through stenoses using vector Doppler ultrasound. Ultrasound Med Biol 2003 Apr;29(4):575-84.
107. Steel R, Ramnarine KV, Criton A, Davidson F, Allan PL, Humphries N, et al. Angle-dependence and reproducibility of dual-beam vector doppler ultrasound in the common carotid arteries of normal volunteers. Ultrasound Med Biol 2004 Feb;30(2):271-6.
108. Ricci S, Diciotti S, Francalanci L, Tortoli P. Accuracy and Reproducibility of a Novel Dual-Beam Vector Doppler Method. Ultrasound Med Biol 2008 Dec 23.
109. Fei DY, Fu CT. New method to obtain ultrasonic angle independent Doppler color images using a sector transducer. Ann Biomed Eng 1999 Mar;27(2):187-93.
110. Nyrnes SA, Lovstakken L, Torp H, Haugen BO. Blood flow imaging-a new angle-independent ultrasound modality for the visualization of flow in atrial septal defects in children. Echocardiography 2007 Oct;24(9):975-81.
111. Lovstakken L, Ibrahim KS, Vitale N, Henriksen ST, Kirkeby-Garstad I, Torp H, et al. Blood flow imaging: a new twodimensional ultrasound modality for enhanced intraoperative visualization of blood flow patterns in coronary anastomoses. J Am Soc Echocardiogr 2008 Aug;21(8):969-75.
112. Pastorelli A, Torricelli G, Scabia M, Biagi E, Masotti L. A realtime 2-D vector Doppler system for clinical experimentation. IEEE Trans Med Imaging 2008 Oct;27(10):1515-24.
113. Ho SS, Metreweli C. Preferred technique for blood flow volume measurement in cerebrovascular disease. Stroke 2000 Jun;31(6):1342-5.
114. Powell AJ, Maier SE, Chung T, Geva T. Phase-velocity cine magnetic resonance imaging measurement of pulsatile blood flow in children and young adults: in vitro and in vivo validation. Pediatr Cardiol 2000 Mar;21(2):104-10.
115. Hundley WG, Li HF, Hillis LD. Quantitation of cardiac output with velocity-encoded, phase-difference magnetic resonance imaging. Am J Cardiol 1995;75:1250-5.
116. Rebergen SA, van der Wall EE, Doornbos J, de RA. Magnetic resonance measurement of velocity and flow: technique, validation, and cardiovascular applications. Am Heart J 1993 Dec;126(6):1439-56.
117. Lotz J, Meier C, Leppert A, Galanski M. Cardiovascular flow measurement with phase-contrast MR imaging: basic facts and implementation. Radiographics 2002 May;22(3):651-71.
118. Higginbotham MB, Morris KG, Williams S, McHale PA, Coleman RE, Cobb FR. Regulation of Stroke Volume during Submaximal and Maximal Upright Exercise in Normal Man. Circ Res 1986;58:281-91.
119. Polak JF. Peripheral Vascular Sonography: A Practical Guide. 2. ed. Lippincott Williams & Wilkins; 2004.
120. Oshinski JN, Curtin JL, Loth F. Mean-average wall shear stress measurements in the common carotid artery. J Cardiovasc Magn Reson 2006;8(5):717-22.
121. Brands PJ, Hoeks AP, Hofstra L, Reneman RS. A noninvasive method to estimate wall shear rate using ultrasound. Ultrasound Med Biol 1995;21(2):171-85.
122. Rubin JM. Spectral Doppler US. Radiographics 1994 Jan;14(1):139-50.
123. Friemel BH, Bohs LN, Nightingale KR, Trahey GE. Wall filtering challenges in two-dimensional vector velocity estimation. IEEE Ultrason Symp 1993;2:1031-4.
124. Oddershede N, Hansen KL, Nielsen MB, Jensen JA. In-vivo examples of synthetic aperture vector flow imaging. Proc SPIE Med Imag 2007;8:6510-3.
125. Marshall I, Papathanasopoulou P, Wartolowska K. Carotid flow rates and flow division at the bifurcation in healthy volunteers. Physiol Meas 2004 Jun;25(3):691-7.
126. Belz GG. Elastic properties and Windkessel function of the human aorta. Cadiovasc Drugs Ther 1995;9(1):73-83.
127. Qui Y, Quijano RC, Wang SK, Hwang HC. Fluid dynamics of venous valve closure. Ann Biomed Eng 1995;23(6):750-9.
128. Lurie F, Kistner RL, Eklof B, Kessler D. Mechanism of venous valve closure and role of the valve in circulation: A new concept. J Vasc Surg 2003;38(5):955-61.
129. Fisher J, Vaghaiwalla F, Tsitlik J, Levin H, Brinker J, Weisfleldt M, et al. Determinants and clinical significance of jugular venous valve competence. Circulation 1982;65(1):188-96.
130. Nedelmann M, Techner D, Dieterich M. Analysis of internal jugular vein insufficiency - a comparison of two ultrasound methods. Ultrasound Med Biol 2007;33(6):857-62.
131. Akkawi NM, Agosti C, Borroni B, Rozzini L, Magoni M, Vignolo LA, et al. Jugular valve incompetence: A study using air contrast ultrasonography on a general population. J Ultrasound Med 2002;21(7):747-51.
132. Shipkowitz T, Rodgers VGJ, Frazin LJ, Chandran KB. Numerical study on the effect of secondary flow in the human aorta on local shear stresses in abdominal aortic branches. J Biomech 2000;33(6):717-28.
133. Xue YJ, Gao PY, Duan Q, Lin Y, Dai CB. Preliminary study of hemodynamic distribution in patient-specific stenotic carotid bifurcation by image-based computational fluid dynamics. Acad Radiol 2008;49(5):558-65.
134. Schuierer G, Huk WJ. Diagnostic significance of flow separation within the carotid bifurcation demonstrated by digital subtraction angiography. Stroke 1990;21(12):1674-9.
135. Stokholm R, Oyre S, Ringgaard S, Flaagoy H, Paaske W, Pedersen EM. Determination of Wall Shear Rate in the Human Carotid Artery by Magnetic Resonance Techniques. Eur J Vasc Endovasc surg 2000;20(5):427-33.
136. Papathanasopoulou P, Zhao SZ, Kohler U, Robertson MB, Long Q, Hoskins P, et al. MRI measurement of time-resolved wall shear stress vectors in a carotid bifurcation model, and comparison with CFD predictions. J Magn Reson Imaging 2003;17(2):153-62.
137. Marshall I, Zhao S.Z., Papathanasopoulou P, Hoskins P, Xu XY. MRI and CDF studies of pulsatile flow in healthy and stenosed carotid bifurcation models. J Biomech 2004;37(5):679-87.
138. Timmers M, Wieling W, Karemaker JM, Lenders JWM. Denervation of carotid baro- and chemoreceptors in humans. J Physiol 2003;553(1):3-11.
139. Mancia G, Ferrari A, Gregorini L, Valentini R, Ludbrook J, Zanchetti A. Circulatory reflexes form carotid and extracarotid baroreceptor areas in man. Circ Res 1977;41:309-15.
140. Conley RB, Doux JD, Lee PY, Bazar KA, Daniel SM, Yun AJ. Integrating the theories of Darwin and Bernoulli: Maladaptive baroreceptor network dysfunction may explain the pathogenesis of aortic aneurysms. Med Hypotheses 2005;65:266-72.
141. Illig KA, Ouriel JA, Holen J, Green RM. Measurement of carotid birfurcation pressure gradients using the Bernoulli principle. J Vasc Surg 1996;4:130-4.
142. Henze L. In-vivo Vector Velocity Estimation Using Ultrasound, Masters Thesis. Copenhagen: Tehcnical University of Denmark; 2009.
143. Feng N, Zhang J, Wang W. An adaptive clutter rejection method based on AR model in color flow imaging. Ultrasonics 2006 Dec 22;44 Suppl 1:e85-e88.
144. Wang PD, Shen Y, Feng NZ. A novel clutter rejection scheme in color flow imaging. Ultrasonics 2006 Dec 22;44 Suppl 1:e303-e305.
145. Allam ME, Greenleaf JF. Isomorphism between pulsed-wave Doppler ultrasound and direction-of-arrival estimation - part I: Basic principles. IEEE Trans Ultrason Ferroelec Freq Contr 1996;43(5):911-22.
146. Allam ME, Kinnick RR, Greenleaf JF. Isomorphism between pulsed-wave Doppler ultrasound and direction-of-arrival estimation - part II: Experimental results. IEEE Trans Ultrason Ferroelec Freq Contr 1996;43(5):923-35.
147. Jensen JA, Hansen M, Tomov BG, Nikolov S, Holten-Lund H. System Architecture of an Experimental Synthetic Aperture Real-time Ultrasound System. IEEE Ultrason Symp 2007;636-40.