High velocity investigation with Multi Line Vector Doppler
| Autor: | Valentino Meacci, Claudio Giangrossi, Stefano Ricci, Piero Tortoli, Alessandro Dallai, Enrico Boni, Riccardo Matera |
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| Rok vydání: | 2019 |
| Předmět: |
Pulse repetition frequency
Aperture Computer science Image quality Acoustics Plane wave 01 natural sciences 030218 nuclear medicine & medical imaging Power (physics) 03 medical and health sciences symbols.namesake 0302 clinical medicine Transmission (telecommunications) 0103 physical sciences Line (geometry) Vector map symbols 010301 acoustics Doppler effect |
| Zdroj: | 2019 IEEE International Ultrasonics Symposium (IUS). |
| DOI: | 10.1109/ultsym.2019.8925613 |
| Popis: | Vector methods based on the transmission of Plane Waves (PWs) produce impressive 2D maps of blood velocity. They are based on complex algorithms that process intensively huge amount of data. Producing 2D vector maps in real-time stresses the system hardware, limiting the achievable Pulse Repetition Frequency (PRF) which is frequently insufficient to measure, e.g., the blood velocities in stenoses, which may be higher than 2m/s. This work shows how the Multi Line Vector Doppler (MLVD) method, implemented on ULA-OP 256, overcomes part of the difficulties by using the new ‘Virtual Real-Time’ (VRT) processing architecture. In real-time, channel data are saved in the system memory, while in VRT data are re-processed from the memory as if they were coming from the probe. The ULA-OP 256 calculation power is used in real-time to achieve maximum PRF at the expenses of image quality, while in VRT the maximum image quality is restored as well. Experiments are reported where MLVD is shown capable of investigating flow jets up to 3 m/s with PRF of 16 kHz. |
| Databáze: | OpenAIRE |
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