Ultrasound methods and systems for measuring physiological properties

An ultrasound system comprising:

• an ultrasound scanner configured to generate ultrasound data based on reflections of ultrasound signals transmitted by the ultrasound scanner at an anatomy, the ultrasound scanner configured to acquire the ultrasound data at two locations of a same vessel that are separated by a distance, the ultrasound data acquired at the two locations within a time interval;
• one or more processors;
• and
• one or more computer-readable storage media having instructions stored thereon that, responsive to execution by the one or more processors, cause the one or more processors to:
• determine a vessel-diameter-change speed over time and a blood-flow-velocity change over time of the vessel at each of the two locations using the ultrasound data;
• determine, based on a correlation between the vessel-diameter-change speed and the blood-flow-velocity change of the vessel at the two locations, a phase delay of a pulse wave propagating through the vessel between the two locations;
• and
• determine a physiological property associated with the vessel based on the vessel-diameter-change speed, the blood-flow-velocity change, the phase delay, and the distance.