Abstract
In an experimental study the value of the spectral broadening index (SBI) in continuous-wave (CW) Doppler measurements has been evaluated. The minimum SBI-value per heart beat (i.e. during systole) was calculated from intraoperatively obtained near-field and far-field Doppler spectra of the infrarenal aorta of 10 dogs. Near-field Doppler spectra show the same shape as far-field Doppler spectra but have a significantly different SBI. The minimum SBI of CW Doppler only contains useful information if the Doppler measurements are performed in the far field using a wide ultrasound beam (low emitting frequency). In that case the velocity profile in the blood vessel can be deduced from the SBI. The SBI depends strongly on the distance between the main axis of the ultrasound beam and the centre of the insonated blood vessel. A proper centring of the ultrasound beam corresponds with SBI-curves during the heart cycle which shown minimal spectral broadening. A real-time display of the SBI-curve on the spectrum analyser provides the means of securing optimal CW Doppler spectra by minimising the SBI-curve during acquisition.
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References
Angelson, B. A. J. (1975) Transcutaneous measurement of aortic blood velocity by ultrasound. Thesis, Trondheim, Norway.
Ascer, E., Veith, F. J., Morin, L., White-Flores, S. A., Scher, L. A., Samson, R. H., Weiser, R. K., Rivers, S. andGupta, S. K. (1984) Quantitative assessment of outflow resistance in lower extremity arterial reconstructions.J. Surg. Res.,37, 8–15.
Bandyk, D., Zierler, R., Berni, G. andThiele, B. (1983) Pulsed Doppler velocity patterns produced by arterial anastomoses.Ultrasound Med. Biol.,9, 79–87.
Bandyk, D., Zierler, R. andThiele, B. (1984) Detection of technical error during arterial surgery by pulsed Doppler spectral analysis.Arch. Surg.,119, 421–428.
Blackshear, W. M., Philips, D. J., Thiele, B. L., Hirsch, J. H., Chikos, P. M., Marinelli, D. S., Ward, K. J. andStrandness, D. E. (1979) Detection of pulsed Doppler spectrum analysis.Surgery,86, 698–706.
Bowald, S., Ericksson, I. andFagerberg, S. (1978) Intraoperative angiography in arterial surgery.Acta Chir. Scan.,144, 463–469.
Creekmore, S. P., Graham, M. M., Jahn, G. E., Targett, R. C. andMcIlroy, M. B. (1982) Comparison of methods of recording and analysis of Doppler blood velocity signals in normal subjects.Ultrasound Med. Biol.,8, 525–535.
Douville, Y., Johnston, K., Kassam, M., Zuech, P., Cobbold, R. andJares, A. (1983) Anin vitro model and its application for the study of carotid Doppler spectral broadening.,9, 347–356.
Evans, D. (1982) Some aspects of the relationship between instantaneous volumetric blood flow and continuous wave Doppler ultrasound recordings (I).,8, 605–609.
Feinberg, D. A., Crooks, L., Hoenninger, J., Arakawa, M. andWatts, J. (1984) Pulsatile bloodflow velocity in human arteries displayed by magnetic resonance imaging.Radiology,153, 117–180.
Fung, Y. C. (1984)Biodynamics circulation. Springer Verlag, New York, USA.
Giddens, D., Madon, R. andCassanova, R. (1976) Measurement of disordered flows distal to subtotal vascular stenoses in the thoracic aortas of dogs.Circul. Res.,39, 112–119.
Gosling, G. (1978) Doppler ultrasound assessment of occlusive arterial disease.The Practitioner, April 1978.
Hoeks, A. P. G. (1982) On the development of a multi-gate pulsed Doppler system with serial data-processing. Thesis, Maastricht, The Netherlands.
Newhouse, V. L., Varner, L. W. andBendick, P. J. (1977) Geometrical spectrum broadening in ultrasonic Doppler systems.IEEE Trans.,BME-24, 478–480.
Newhouse, V. L., Furgason, E. S., Johnson, G. F. andWolf, D. A. (1980) The dependence of ultrasound Doppler band width on beam geometry.IEEE Trans.,SU-27, 50–59.
Randall, D. R., Shircliffe, A. C. andPlonk, G. W. (1982) Femoral artery cuff plethysmography in arterial occlusive disease.American Surgeon,28, 333–338.
Roederer, G. O., Langlois, Y. andStrandness, D. E. (1984) Comprehensive noninvasive evaluation of extracranial cerebrovascular disease. InNoninvasive diagnosis of vascular disease. Hershey, F. B., Barnes, R. W. Butterworths, London, U.K., 177–216.
Wells, P. N. T. (1977)Biomedical ultrasonics. Academic Press, London, UK, 26–30.
Wien, K. D. andHarder, D. (1982) Characteristics of the pulsed ultrasound field.Brit. J. Cancer [Suppl],45, 59–63.
Woodcock, J. (1979)Ultrasonics. (Medical Physics Handbooks 1). Adam Hilger Ltd, Bristol, UK.
Zierler, R., Bandyk, D., Berni, G. andThiele, B. (1983) Intraoperative pulsed Doppler assessment of carotid endarterectomy.Ultrasound Med. Biol.,9, 65–71.
Zuech, P., Cobbold, R. S., Kassman, M. andJohnston, K. W. (1982) The application of CCD transversal filters for real time spectral analysis of Doppler ultrasound signals.,8, 57–69.
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Wijn, P.F.F., van der Sar, P., Gootzen, T.H.J.M. et al. Value of the spectral broadening index in continuous wave Doppler measurements. Med. Biol. Eng. Comput. 25, 377–385 (1987). https://doi.org/10.1007/BF02443357
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DOI: https://doi.org/10.1007/BF02443357