The present invention relates to an ultrasound apparatus for medical examination of a subject. The ultrasound apparatus comprises a plurality of ultrasound transducers for emitting and receiving ultrasound waves and for providing different ultrasound signals on the basis of the ultrasound waves. A connection layer is provided, which is attachable to the subject, wherein the ultrasound transducers are coupled to the connection layer. A processing unit, which is connectable to the ultrasound transducers is provided for receiving the ultrasound signals and for determining at least one parameter on the basis of the ultrasound signals. The processing unit is adapted to determine at least one parameter indicative of a relative position of the ultrasound transducers to each other and/or a shape of the connection layer and the ultrasound waves are surface acoustic waves transmitted through the connection layer or a layer attached to the connection layer.
