Matches in SemOpenAlex for { <https://semopenalex.org/work/W2063458506> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W2063458506 abstract "Ultrasonic methods can be used for calculating flow when the mean Doppler frequency is representative of spatial average velocity. We have examined the capabilities of two commercially available methods of Doppler spectral analysis for providing measurements of spatial average velocity and flow. In a steady state flow model, Doppler audio spectra were recorded using a 5-MHz duplex scanner. Fast Fourier transform (FFT) spectral analysis was used to determine mean (M), mode (MO), and maximum (MAX) frequencies. An analog method (offset zero crossing detector = ZC) was used to determine root mean square (RMS) frequencies. The results of comparing Doppler flow estimates (QM, QMO, QMAX and QRMS) with direct flow measurements (n = 10; range = 128-1098 ml/min) were (1) QM = 0.67Q + 23 ml/min (SEE = 36 ml/min); (2) QMO = 0.96Q + 152 ml/min (SEE = 32 ml/min); (3) QMAX = 1.19Q + 171 ml/min (SEE = 23 ml/min); and (4) QRMS = 0.93Q + 76ml/min (SEE = 92 ml/min). Estimates of flow using M and RMS frequencies were adversely affected by experimental conditions likely to result in turbulence. We conclude that application of commercially available FFT determined M frequencies could result in significant errors in calculations of spatial average velocity and flow. Alternatively, FFT determined MO frequencies and ZC determined RMS frequencies resulted in accurate estimates of flow in this model. This study demonstrates the importance of evaluating the capabilities of commercially available methods of Doppler spectral analysis when using ultrasound for determining velocity and flow." @default.
- W2063458506 created "2016-06-24" @default.
- W2063458506 creator A5049899018 @default.
- W2063458506 creator A5055234231 @default.
- W2063458506 creator A5073075400 @default.
- W2063458506 creator A5086589001 @default.
- W2063458506 date "1985-09-01" @default.
- W2063458506 modified "2023-09-25" @default.
- W2063458506 title "A comparison of digital and analog methods of doppler spectral analysis for quantifying flow" @default.
- W2063458506 cites W1973076466 @default.
- W2063458506 cites W1975318317 @default.
- W2063458506 cites W1983099788 @default.
- W2063458506 cites W1986924439 @default.
- W2063458506 cites W1989746297 @default.
- W2063458506 cites W2006549170 @default.
- W2063458506 cites W2016013646 @default.
- W2063458506 cites W2028553674 @default.
- W2063458506 cites W2050728862 @default.
- W2063458506 cites W2059888483 @default.
- W2063458506 cites W2069578398 @default.
- W2063458506 cites W2088121888 @default.
- W2063458506 cites W2105076839 @default.
- W2063458506 cites W222988264 @default.
- W2063458506 cites W2327460702 @default.
- W2063458506 cites W2400933213 @default.
- W2063458506 cites W2991180006 @default.
- W2063458506 cites W614134218 @default.
- W2063458506 cites W657130071 @default.
- W2063458506 doi "https://doi.org/10.1016/0301-5629(85)90106-1" @default.
- W2063458506 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/2932830" @default.
- W2063458506 hasPublicationYear "1985" @default.
- W2063458506 type Work @default.
- W2063458506 sameAs 2063458506 @default.
- W2063458506 citedByCount "17" @default.
- W2063458506 crossrefType "journal-article" @default.
- W2063458506 hasAuthorship W2063458506A5049899018 @default.
- W2063458506 hasAuthorship W2063458506A5055234231 @default.
- W2063458506 hasAuthorship W2063458506A5073075400 @default.
- W2063458506 hasAuthorship W2063458506A5086589001 @default.
- W2063458506 hasConcept C11413529 @default.
- W2063458506 hasConcept C121332964 @default.
- W2063458506 hasConcept C126322002 @default.
- W2063458506 hasConcept C1276947 @default.
- W2063458506 hasConcept C142757262 @default.
- W2063458506 hasConcept C158846371 @default.
- W2063458506 hasConcept C196558001 @default.
- W2063458506 hasConcept C2524010 @default.
- W2063458506 hasConcept C33923547 @default.
- W2063458506 hasConcept C38349280 @default.
- W2063458506 hasConcept C52305850 @default.
- W2063458506 hasConcept C57879066 @default.
- W2063458506 hasConcept C62520636 @default.
- W2063458506 hasConcept C71907059 @default.
- W2063458506 hasConcept C71924100 @default.
- W2063458506 hasConcept C75172450 @default.
- W2063458506 hasConceptScore W2063458506C11413529 @default.
- W2063458506 hasConceptScore W2063458506C121332964 @default.
- W2063458506 hasConceptScore W2063458506C126322002 @default.
- W2063458506 hasConceptScore W2063458506C1276947 @default.
- W2063458506 hasConceptScore W2063458506C142757262 @default.
- W2063458506 hasConceptScore W2063458506C158846371 @default.
- W2063458506 hasConceptScore W2063458506C196558001 @default.
- W2063458506 hasConceptScore W2063458506C2524010 @default.
- W2063458506 hasConceptScore W2063458506C33923547 @default.
- W2063458506 hasConceptScore W2063458506C38349280 @default.
- W2063458506 hasConceptScore W2063458506C52305850 @default.
- W2063458506 hasConceptScore W2063458506C57879066 @default.
- W2063458506 hasConceptScore W2063458506C62520636 @default.
- W2063458506 hasConceptScore W2063458506C71907059 @default.
- W2063458506 hasConceptScore W2063458506C71924100 @default.
- W2063458506 hasConceptScore W2063458506C75172450 @default.
- W2063458506 hasLocation W20634585061 @default.
- W2063458506 hasLocation W20634585062 @default.
- W2063458506 hasOpenAccess W2063458506 @default.
- W2063458506 hasPrimaryLocation W20634585061 @default.
- W2063458506 hasRelatedWork W2003404603 @default.
- W2063458506 hasRelatedWork W2005326229 @default.
- W2063458506 hasRelatedWork W2014390579 @default.
- W2063458506 hasRelatedWork W2081251253 @default.
- W2063458506 hasRelatedWork W2091739919 @default.
- W2063458506 hasRelatedWork W2128660649 @default.
- W2063458506 hasRelatedWork W2168534323 @default.
- W2063458506 hasRelatedWork W2377904794 @default.
- W2063458506 hasRelatedWork W318229835 @default.
- W2063458506 hasRelatedWork W93908154 @default.
- W2063458506 isParatext "false" @default.
- W2063458506 isRetracted "false" @default.
- W2063458506 magId "2063458506" @default.
- W2063458506 workType "article" @default.