Variable power saving processing scheme for ultrasound beamformer functionality
In general, embodiments of the ultrasound imaging system save power in relation to a predetermined active aperture and or a predetermined update depth. With respect to a predetermined active aperture, the imaging system saves power by reducing or turning off a predetermined portion of the receive electronics when the predetermined receive electronics portion is not operating in relation to the active aperture range. That is, in a first power saving mode, the predetermined receive electronics portion operates only when it is collecting and or processing the data inside the active aperture range. Furthermore, with respect to a predetermined update depth, the imaging system saves power by reducing the operational frequency as the predetermined receive electronics portion collects or process the data from a deeper area. That is, in a second power saving mode, the predetermined receive electronics portion operates less frequently when it is collecting and or processing the data from the middle or far range than the near range. Lastly, the imaging system saves power by modifying the operation as the predetermined receive electronics portion collects or process the data depending upon the active aperture and or the update depth. That is, in a third power saving mode, the predetermined receive electronics portion operates at least less frequently when it is collecting and or processing the data from the outside the active aperture and or at a far update depth. In other words, the third power saving mode is a hybrid or combination of the first and second power saving modes.
1. A method of saving power in an ultrasound imaging device, comprising the steps of:
a) transmitting ultrasound pulses from transmit elements of a transducer array towards a region of interest of a subject;
b) receiving at receiving elements of the transducer array ultrasound echoes that have been reflected from the region of interest of the subject and converting the ultrasound echoes into channel signals;
c) saving power in the ultrasound imaging device by selectively performing interpolation for data of the channel signals at predetermined update depths with a decreased number of interpolated data, generated by the interpolation, along a depth direction in the region of interest; and
d) beamforming by using the data of the channel signals and the interpolated data at reception focal points arranged along the depth direction, wherein the depth direction corresponds to a direction toward a deeper side of the region of interest.
2. The method of saving power in an ultrasound imaging device according to claim 1 wherein said interpolation is eliminated at one of the predetermined update depths.