Generating Bubbles, Diagnosing by Bubbles, and Treating with Bubbles: From Generation of Ultrasonic Contrast Agent to Its Medical Application (2): Application to diagnosis: Contrast Imaging

Abstract

An ultrasonic contrast echo method using two beams with different frequencies is described. Summation and difference components in the echo signals received from the microbubbles are generated. Thus, the blood flow is estimated by the Dopplar frequency of those components. This method has advantages of SNR improvements and absolute value measurement.