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For contrast enhanced perfusion imaging semi-quantitative methods (such as the bolus-, replenishment- or depletion-method) are commonly used to analyze the dynamic changes in concentration of contrast agent induced by insonification. In order to apply these methods and to decrease artifacts from tissue nonlinearity, perfusion imaging is conducted using decreased transmit power. However, echo signals...
Full angle spatial compounding is of interest for imaging small organs (breast, testicles) and small animals. Besides phase aberration and out of plane refraction the variations in speed of sound, usually assumed to be constant, also cause registration error. This error may be negligible regarding the visual appraisal of B-mode images; its effect on spatial compounding of the individual scans may,...
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