1. Sequential velocity development in the ascending and descending aorta;Falsetti;Circulation,1971
2. Determination of mean velocity of circumferential fiber shortening by echo cardiography;Fortuin;Circulation,1971
3. Blood flow measured by Doppler frequency shift of back-scattered ultrasound;Franklin;Science,1961
4. Phaselock Techniques;Gardner,1966
5. Supra-sternal vascular ultrasonography;Goldberg;Circulation,1971