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Automated quantification of color Doppler signals: a preliminary study in breast tumors
R P Kedar1, D O Cosgrove, J C Bamber
1Department of Nuclear Medicine, Royal Marsden Hospital, Sutton, Surrey, England.
Purpose:
To quantify color Doppler (CD) signals reflected by breast lesions to improve differential diagnosis and serial comparisons.
Materials And Methods:
Frame-grabbed color-capture scans were remapped to original velocities on a pixel-by-pixel basis for statistical analysis. Total CD area and its percentage, peak and mean velocities, standard deviation of velocity, and integral CD velocity and its percentage were calculated. These indexes were applied to scans of 44 cancers, 16 fibroadenomas, and 14 benign breast changes in 74 patients.
Results:
With the region of interest confined to the lesion and a 5-mm margin, no CD signals were reflected by the benign breast changes. All carcinomas and 12 fibroadenomas (those that were vascular) reflected CD signals, and, except for mean and peak velocity, all scores for cancers were significantly higher than for fibroadenomas (P < .0001). Integral CD velocity was the best discriminator, with no overlap between carcinomas (range, 1,128-50,228 cm3/sec) and fibroadenomas (range, 0-1,027 cm3/sec).
Conclusion:
Automatic CD quantification improved differential diagnosis of breast masses.