Number | Date | Country | Kind |
---|---|---|---|
3037641 | Oct 1980 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4153894 | Alphonse et al. | May 1979 | |
4276885 | Tickner et al. | Jul 1981 |
Entry |
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Meltzer et al., "The Source of Ultrasound Contrast Effect;" Journal of Clinical Ultrasound; Apr. 1980, pp. 121-127. |
Anderson et al., "A New Noninvasive Technique for Cardiac Pressure Measurement II: Scattering from Encapsulated Bubbles;" Conference Report: Noninvasive Cardiovascular Measurements, Stanford, CA., Sep. 1978, pp. 121-127. |