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Two-dimensional random arrays for real time volumetric imaging.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Davidsen, R. E. Jensen, J. A. Smith, Savannah |
| Copyright Year | 1994 |
| Abstract | Two-dimensional arrays are necessary for a variety of ultrasonic imaging techniques, including elevation focusing, 2-D phase aberration correction, and real time volumetric imaging. In order to reduce system cost and complexity, sparse 2-D arrays have been considered with element geometries selected ad hoc, by algorithm, or by random process. Two random sparse array geometries and a sparse array with a Mills cross receive pattern were simulated and compared to a fully sampled aperture with the same overall dimensions. The sparse arrays were designed to the constraints of the Duke University real time volumetric imaging system, which employs a wide transmit beam and receive mode parallel processing to increase image frame rate. Depth-of-field comparisons were made from simulated on-axis and off-axis beamplots at ranges from 30 to 160 mm for both coaxial and offset transmit and receive beams. A random array with Gaussian distribution of transmitters and uniform distribution of receivers was found to have better resolution and depth-of-field than both a Mills cross array and a random array with uniform distribution of both transmit and receive elements. The Gaussian random array was constructed and experimental system response measurements were made at several ranges. Comparisons of B-scan images of a tissue mimicking phantom show improvement in resolution and depth-of-field consistent with simulation results. |
| File Format | PDF HTM / HTML |
| DOI | 10.1006/uimg.1994.1009 |
| PubMed reference number | 7839555 |
| Journal | Medline |
| Volume Number | 16 |
| Issue Number | 3 |
| Alternate Webpage(s) | http://orbit.dtu.dk/files/111862993/84710091.pdf |
| Alternate Webpage(s) | https://doi.org/10.1006/uimg.1994.1009 |
| Journal | Ultrasonic imaging |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
