| Autor: |
Park EY; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Cai X; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Foiret J; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Bendjador H; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Hyun D; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Fite BZ; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Wodnicki R; Department of Biomedical Engineering, University of Southern California, Los Angeles, CA 90089, USA., Dahl JJ; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Boutin RD; Department of Radiology, Stanford University, Stanford, CA 94305, USA., Ferrara KW; Department of Radiology, Stanford University, Stanford, CA 94305, USA. |
| Abstrakt: |
Volumetric ultrasound imaging has the potential for operator-independent acquisition and enhanced field of view. Panoramic acquisition has many applications across ultrasound; spanning musculoskeletal, liver, breast, and pediatric imaging; and image-guided therapy. Challenges in high-resolution human imaging, such as subtle motion and the presence of bone or gas, have limited such acquisition. These issues can be addressed with a large transducer aperture and fast acquisition and processing. Programmable, ultrafast ultrasound scanners with a high channel count provide an unprecedented opportunity to optimize volumetric acquisition. In this work, we implement nonlinear processing and develop distributed beamformation to achieve fast acquisition over a 47-centimeter aperture. As a result, we achieve a 50-micrometer -6-decibel point spread function at 5 megahertz and resolve in-plane targets. A large volume scan of a human limb is completed in a few seconds, and in a 2-millimeter dorsal vein, the image intensity difference between the vessel center and surrounding tissue was ~50 decibels, facilitating three-dimensional reconstruction of the vasculature. |
