Pixel-reassignment in ultrasound imaging

Tal I. Sommer, Ori Katz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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.

Original languageAmerican English
Article number123701
JournalApplied Physics Letters
Issue number12
StatePublished - 20 Sep 2021

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