Abstract: A method and processing device are presented for reconstructing an absorption and/or scattering image of a region of interest inside a scattering medium. A mathematical model is provided being representative of a relation between the distribution of the intensity and phase of electromagnetic radiation components scattered from a medium and a certain attenuation factor, which is function of spatial variations of scattering and absorption coefficients of the medium. The mathematical is used for processing a map of distribution of the intensity of electromagnetic radiation components scattered from known locations within the region of interest, thereby producing a halftone pattern of the region of interest.

Abstract: A method and apparatus are presented for detecting an effect of interactions of electromagnetic radiation with ultrasound radiation at different locations within a region of interest in a scattering medium to thereby enable imaging of said medium. A plurality of sequences of pulses of ultrasound radiation is transmitted towards a plurality of locations, respectively, in said region of interest within an X-Y plane perpendicular to axes of propagation of the ultrasound pulses. Said region of interest is illuminated with incident electromagnetic radiation of at least one wavelength. The phases of the ultrasound radiation or the phases of the electromagnetic radiation components are appropriately controlled in order to be enable identification of the interactions between the electromagnetic and ultrasound radiation that occur at different locations along the Z-axis.

Abstract: A method and processing device are presented for reconstructing an absorption and/or scattering image of a region of interest inside a scattering medium. A mathematical model is provided being representative of a relation between the distribution of the intensity and phase of electromagnetic radiation components scattered from a medium and a certain attenuation factor, which is function of spatial variations of scattering and absorption coefficients of the medium. The mathematical is used for processing a map of distribution of the intensity of electromagnetic radiation components scattered from known locations within the region of interest, thereby producing a halftone pattern of the region of interest.

Abstract: A method and apparatus are presented for detecting an effect of interactions of electromagnetic radiation with ultrasound radiation at different locations within a region of interest in a scattering medium to thereby enable imaging of said medium. A plurality of sequences of pulses of ultrasound radiation is transmitted towards a plurality of locations, respectively, in said region of interest within an X-Y plane perpendicular to axes of propagation of the ultrasound pulses. Said region of interest is illuminated with incident electromagnetic radiation of at least one wavelength. The phases of the ultrasound radiation or the phases of the electromagnetic radiation components are appropriately controlled in order to be enable identification of the interactions between the electromagnetic and ultrasound radiation that occur at different locations along the Z-axis.

Abstract: Method and apparatus for determining the oxygenation level of hemoglobin in a probed region of the human body. A probed region of the body is irradiated with diffuse light, the frequency of which is shifted with ultrasound focused at the probed region. The relation between the two states of the oxygenation of the hemoglobin is determined by the light absorption at the focal region of the ultrasound. The blood volume may be monitored by irradiating the probed region with light at the isosbestic point.

Abstract: Method of making a three-dimensional photonic band-gap crystal, in which a three-dimensional structure is built by successively forming a plurality of superimposed layers of photosensitive chalcogenide and creating a predetermined grating on each of them. A layer of photoresist is superimposed on each chalcogenide layer. The chalcogenide glasses are chosen among those that are photosensitive, have a high refractive index, a high ratio of high etching speed to low etching speed of at least 10. The refractive index of the glasses may be higher than 2.5. The ratio of high etching speed to low etching speed of the glasses may be at least 10.