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  • An innovation: Matrix...

An innovation: Matrix imaging improves ultrasound resolution

Hina ZahidBy Hina ZahidPublished On 2020-06-12T18:00:00+05:30  |  Updated On 2020-06-12T18:00:22+05:30
An innovation: Matrix imaging improves ultrasound resolution

Ultrasound is a flexible and powerful medical imaging tool. In conventional ultrasounds, variations in soft tissue structure distort ultrasound wavefronts. They blur the image and can hence prove detrimental to medical diagnosis. Researchers at the Institut Langevin (CNRS/ESPCI Paris-PSL)* have developed a new non-invasive ultrasound method that avoids such aberrations. In an...

Ultrasound is a flexible and powerful medical imaging tool. In conventional ultrasounds, variations in soft tissue structure distort ultrasound wavefronts. They blur the image and can hence prove detrimental to medical diagnosis.

Researchers at the Institut Langevin (CNRS/ESPCI Paris-PSL)* have developed a new non-invasive ultrasound method that avoids such aberrations. In an article published in the journal PNAS** on 10 June 2020, the scientists showed how this method can subtly compensate for the distortions that a focused wave undergoes as it travels through the studied tissue, with an ideal resolution and contrast optimized for each pixel in the image. This approach can be extended to any type of wave, and can be controlled by a multi-sensor network. Applications range from biomedical diagnosis to optical microscopy, detection of cracks in industrial materials, and the monitoring of volcanoes and fault zones in geophysics.

This imaging method, known as matrix imaging, was also the subject of an article published recently in the journal Physical Review X***, as it can also help develop new approaches to imaging. This research was funded by an ERC Consolidator grant (no. 819261) as part of the European Union's Horizon 2020 Programme for Research and Innovation, and led to the filing of a patent by the CNRS, published in February 2020 (WO2020016250A1). 

This process is particularly efficient in random scattering media, where traditional approaches such as adaptive focusing fail. Here, we first present an experimental proof of concept on a tissue-mimicking phantom and then, apply the method to in vivo imaging of human soft tissues. While introduced here in the context of acoustics, this approach can also be extended to optical microscopy, radar, or seismic imaging.

The noninvasive reflection method accesses a transmission matrix, which connects any point inside the medium with a sensor array outside. This matrix is the holy grail for imaging and it is shown that it enables in vivo imaging with close-to-ideal resolution and contrast at every pixel.

http://dx.doi.org/10.1073/pnas.1921533117 

proceedings of the national academy of sciences matrix imaging ultrasound resolution 
Source : Proceedings of the National Academy of Sciences
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

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