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Quantitative characterization of color Doppler images: Reproducibility, accuracy, and limitations by Stefan Delorme; Gerald Weisser; Ivan Zuna; Martin Fein; Adolf Lorenz; Gerhard van Kaick is a Medicine article available to read on EtoBox.
What is Quantitative characterization of color Doppler images: Reproducibility, accuracy, and limitations about?
## Abstract A computer‐based quantitative analysis for color Doppler images of complex vascular formations is presented. The red‐green‐blue‐signal from an Acuson XP10 is frame‐grabbed and digitized. By matching each image pixel with the color bar, color pixels are identified and assigned to the corresponding flow velocity (color value). Data analysis consists of delineation of a region of interest and calculation of the relative number of color pixels in this region (color pixel density) as well as the mean color value. The mean color value was compared to flow velocities in a flow phantom. The thyroid and carotid artery in a volunteer were repeatedly examined by a single examiner to assess intra‐observer variability. The thyroids in five healthy controls were examined by three experienced physicians to assess the extent of inter‐observer variability and observer bias. The correlation between the mean color value and flow velocity ranged from 0.94 to 0.96 for a range of velocities determined by pulse repetition frequency. The average deviation of the mean color value from the flow velocity was 22% to 41%, depending on the selected pulse repetition frequency (range of deviations, −4
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- Author
- Stefan Delorme; Gerald Weisser; Ivan Zuna; Martin Fein; Adolf Lorenz; Gerhard van Kaick
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0091-2751)
- Published
- 1995
- Language
- EN
- Field
- Medicine (Health Sciences)