Ultrasound imaging system memory architecture
A multiple aperture ultrasound imaging system may be configured to store raw, un-beamformed echo data. Stored echo data may be retrieved and re-beamformed using modified parameters in order to enhance the image or to reveal information that was not visible or not discernible in an original image. Raw echo data may also be transmitted over a network and beamformed by a remote device that is not physically proximate to the probe performing imaging. Such systems may allow physicians or other practitioners to manipulate echo data as though they were imaging the patient directly, even without the patient being present. Many unique diagnostic opportunities are made possible by such systems and methods.
1. A method of ultrasound imaging, comprising:
transmitting an ultrasound ping from at least one transmit element into a patient;
storing transmit information pertaining to the ultrasound ping in raw data memory;
receiving echoes corresponding to the ultrasound ping with at least one receive element;
receiving transducer element location data that provides an acoustic position the at least one transmit element relative to the at least one receive element;
sampling the echoes at a plurality of sampling points to generate a digital record containing a signal magnitude and timestamp entry;
storing the digital record in raw data memory for each sampling point;
beamforming the digital record to form an ultrasound image; and
re-beamforming a selected region of the digital record to form a zoomed ultrasound image.
2. The method of claim 1 , further comprising:
performing a calibration operation of the transmit and receive elements to obtain updated calibration data; and
processing the digital record using the updated calibration data to form an ultrasound image.
3. The method of claim 1 , wherein a first resolution of the ultrasound image is the same as a second resolution of the zoomed ultrasound image.
4. The method of claim 1 , further comprising interpolating data in between displayed pixels of the zoomed ultrasound image.