HARMONIC IMAGING HARMONIC IMAGING The second new technology improving visualization, harmonic imaging,9 was developed in tandem with contrast media, following the realization that ultrasound has some nonlinear properties. Returning echoes produced by the media are not only at the original fundamental generated by the transducer but at several different frequencies-multiples of the original one and secondary to v.. 2009. 6. 9. 이전 1 ··· 2799 2800 2801 2802 2803 2804 2805 ··· 2808 다음
