Measuring transducer movement methods and systems for multi-dimensional ultrasound imaging

A system for measuring transducer movement for multi-dimensional ultrasound imaging, the system comprising:

• a transducer;
• a flow detector connected with the transducer and operable to output ultrasound data;
• an adaptor connected with the transducer;
• an optical sensor on the adaptor such that the optical sensor is directed towards a skin surface during use of the transducer;
• and
• a processor operable to:
• determine movement of the transducer in response to a signal from the optical sensor;
• measure motion from the ultrasound data representing at least one scan plane position;
• and
• determine a first distance between scan plane positions including the at least one scan plane position as a function of a substantially maintained transducer angle other than perpendicular to a skin surface at each scan plane position, as a function of the measured motion from the ultrasound data representing the at least one scan plane position, and as a function of the determined movement of the transducer in response to the signal from the optical sensor.