Enhanced Transcranial Ultrasonic Imaging utilizing Dual Frequency Transducers

In the present work the development of a dual frequency ultrasonic imaging method is proposed to assist the transcranial acoustic wave propagation for medical applications. This method depends on the significantly altered acoustic properties of the skull, compared to the soft brain tissues, mainly on the increased absorption coefficient. The latter leads in a differentiated acoustic wave propagation at separate frequencies and the fusion of the acquired data provide an enhanced perception of the inner, to the skull, regions. The theoretical analysis is performed based on realistic human skull and brain tissue properties, while it is validated via an accurate numerical model, both in A-scan and B-scan modes.