Pixel-reassignment in ultrasound imaging

We present an adaptation of the pixel-reassignment technique from confocal fluorescent microscopy to coherent ultrasound imaging. The method, ultrasound pixel-reassignment (UPR), provides a resolution and signal to noise (SNR) improvement in ultrasound imaging by computationally reassigning off-focus signals acquired using traditional plane wave compounding ultrasonography. We theoretically analyze the analogy between the optical and ultrasound implementations of pixel reassignment and experimentally evaluate the imaging quality on tissue-mimicking acoustic phantoms. We demonstrate that UPR provides a 25% resolution improvement and a 3 dB SNR improvement in in vitro scans without any change in hardware or acquisition schemes.& nbsp;Published under an exclusive license by AIP Publishing.

Automated summary

The ultrasound pixel-reassignment (UPR) technique adapts the pixel-reassignment method from confocal fluorescent microscopy to improve resolution and signal to noise ratio in ultrasound imaging. The theoretical analysis and experimental evaluation demonstrate a 25% resolution improvement and 3 dB SNR improvement in in vitro scans without any hardware or acquisition scheme changes.