Modeling the recoveryof the optoacoustic image of oxygenated erythrocyte

Abstract

Optoacousticimaging makes it possible to detect the generated ultrasonic waves in the medium under study, while absorbing pulsed laser radiation based on the optoacoustic effect. This method combines the advantages of spectral optical contrast and scalable acoustic resolution at depths from millimeter to centimeter and is gradually becoming a practical tool for many biomedical applications. Optoacoustic imaging is a hybrid, non-invasive technique.In recent years, much attention has been paid to the restoration of optoacoustic images, in particular, various reconstruction methods are being developed, such as rear projection, frequency do-main reconstruction, time reversal and model-based reconstruction. Although these methods are based on various propagation theories, they have relatively simple implementations for im-age reconstruction in homogeneous environments. However, in the case of heterogeneous lay-ered media, the existing propagation models need to be modified to take into account various acoustic effects at the interface of the layers, which complicates the reconstruction process. To eliminate distortions caused by diffraction of acoustic waves, the method of moving a virtu-al detector is used for image reconstruction. The proposed method can be used to obtain imag-es in layered inhomogeneous media.