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Differentiation of Benign from Malignant Solid Breast Masses: Conventional US versus Spatial Compound Imaging¹

¹ From the Dept of Radiology, Seoul Municipal Boramae Hosp, Seoul, Korea (J.H.C.); Dept of Radiology and Clinical Research Inst, Seoul National Univ Hosp and the Inst of Radiation Medicine, 28, Yongon-dong, Chongno-gu, Seoul 100-744, Korea (W.K.M., N.C., S.Y.C., G.C., J.G.I.), Dept of Radiology, Univ of Ulsan College of Medicine, Asan Medical Ctr, Seoul, Korea (S.H.P.); Dept of Radiology, College of Medicine, Iowa Univ, Iowa City, Iowa (J.M.P.); Dept of Radiology, Samsung Medical Ctr, Sungkyunkwan Univ School of Medicine, Seoul, Korea (B.K.H., Y.H.C.). Received Aug 26, 2004; revision requested Oct 29; revision received Dec 17; accepted Jan 20, 2005. Supported by grant 05-2003-0060 from Seoul National University Hospital Research Fund. Address correspondence to W.K.M. (e-mail: moonwk{at}radcom.snu.ac.kr).

View larger version (128K): [in a new window]   Figure 1a. US images obtained in 40-year-old woman with infiltrating ductal carcinoma. Comparison between (a) transverse spatial compound image and (b) conventional US image demonstrates enhanced delineation of tumor margin owing to speckle reduction and disappearance of posterior acoustic shadowing (*) on spatial compound image. Both images show punctate echogenic dots (arrows) within a hypoechoic mass that correspond to microcalcifications seen at mammography. Final assessment by all readers was "highly suggestive of malignancy" at both spatial compound imaging and conventional US.

View larger version (134K): [in a new window]   Figure 1b. US images obtained in 40-year-old woman with infiltrating ductal carcinoma. Comparison between (a) transverse spatial compound image and (b) conventional US image demonstrates enhanced delineation of tumor margin owing to speckle reduction and disappearance of posterior acoustic shadowing (*) on spatial compound image. Both images show punctate echogenic dots (arrows) within a hypoechoic mass that correspond to microcalcifications seen at mammography. Final assessment by all readers was "highly suggestive of malignancy" at both spatial compound imaging and conventional US.

View larger version (156K): [in a new window]   Figure 2a. US images obtained in 34-year-old woman with fibroadenoma. Comparison between (a) transverse spatial compound image and (b) conventional US image demonstrates enhanced delineation of tumor margin owing to speckle reduction on spatial compound image. Posterior acoustic enhancement (*) is reduced on spatial compound image. Final assessment by all readers was "probably benign" at both spatial compound imaging and conventional US.

View larger version (166K): [in a new window]   Figure 2b. US images obtained in 34-year-old woman with fibroadenoma. Comparison between (a) transverse spatial compound image and (b) conventional US image demonstrates enhanced delineation of tumor margin owing to speckle reduction on spatial compound image. Posterior acoustic enhancement (*) is reduced on spatial compound image. Final assessment by all readers was "probably benign" at both spatial compound imaging and conventional US.