1. Holz K, Becker R, Schürmann R. Ultrasound in the investigation of tubal patency in infertile women. A meta-analysis of three comparative studies of Echovist 200. In press.
2. Degenhardt F, Jibril S, Eisenhauer B. Hysteringo-contrast sonography (HyCoSy) for determining tubal patency. Clin Radiol 1996; 51 (Suppl 1): 15–18.
3. Burns PB. Potential advantages of harmonic imaging. Advances in Echo-Contrast 1994; 4: 17–19.
4. Burns PB. Potential advantages of harmonic imaging. Advances in Echo-Contrast 1994; 4: 17–19.
5. Schwarz KQ, Bezante GP, Chen X et al. Quantitative echo contrast measurement by Doppler sonography. Ultrasound Med Biol 1993; 19: 289–97.