Adding sideways motion data boosts ultrasound coverage from 40% to nearly full width.

Doctors often track tiny magnetic nanoparticles inside the body using ultrasound. Usually, these tools only measure tissue moving in one direction, along the ultrasound beam. This misses how soft tissue moves sideways and dynamically. To fix this, researchers created a new method that tracks movement in multiple directions at every pixel. It combines both up-and-down and side-to-side motion to map tissue mechanics. Testing showed that adding sideways data expanded the map coverage from roughly 40% to nearly the full width of the ultrasound view. The method also detected differences of up to 50% in stiffness and viscosity across samples. This lets scientists tell nanoparticle regions apart from normal tissue and track how well treatments work.

Why it matters

This method allows doctors to see how stiff or soft tissues are across a much wider area using ultrasound. That matters for detecting tumors or monitoring treatments that change tissue properties, because current methods miss large portions of the image. It also distinguishes areas containing magnetic nanoparticles from surrounding tissue, which could help track drug delivery or therapy effects.

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