title: Three-dimensional photoacoustic imaging of blood vessels in tissue.
abstract: We applied photoacoustics as a tissue tomography technique for the detection of blood concentrations, e.g., angiogenesis around tumors. We imaged blood vessels in highly scattering samples, using 532-nm light, to depths of ~1 cm . The samples were real tissue (chicken breast) or 10% dilutions of Intralipid-10%. The blood flowed through nylon capillaries. Polyvinylidene difluoride (PVdF) piezoelectric detectors were used in a surface-scanning mode. We demonstrate the sensitivity of the technique by photoacoustic detection of single red blood cells upon a glass plate. Lateral resolution is limited by the detector diameter (200 microm). The depth resolution is ~10 microm.
authors: C G
authors: CG
authors: Hoelen
authors: F F
authors: FF
authors: de Mul
authors: R
authors: R
authors: Pongers
authors: A
authors: A
authors: Dekker