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Article Dans Une Revue Optics Letters Année : 2013

Improving visibility in photoacoustic imaging using dynamic speckle illumination

Résumé

In high-frequency photoacoustic imaging with uniform illumination, homogeneous photoabsorbing structures may be invisible because of their large size or limited-view issues. Here we show that, by exploiting dynamic speckle illumination, it is possible to reveal features that are normally invisible with a photoacoustic system comprised of a 20 MHz linear ultrasound array. We demonstrate imaging of a ∅5 mm absorbing cylinder and a 30 μm black thread arranged in a complex shape. The hidden structures are directly retrieved from photoacoustic images recorded for different random speckle illuminations of the phantoms by assessing the variation in the value of each pixel over the illumination patterns.
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Dates et versions

hal-01974514 , version 1 (10-12-2020)

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Jérôme Gateau, Thomas Chaigne, Ori Katz, Sylvain Gigan, Emmanuel Bossy. Improving visibility in photoacoustic imaging using dynamic speckle illumination. Optics Letters, 2013, 38 (23), pp.5188-5191. ⟨10.1364/ol.38.005188⟩. ⟨hal-01974514⟩
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