The catheter device (100,2000,3000,4000,540), the proximal edge (112) and the distal (2036) edge (114) the expansion body which it possesses (110) with, this expansion body (110) the distal (2036) edge (114) the acoustic transducer which is arranged in the vicinity (130,2300,3300,4300,544) with, 1 where it is supplied in itself or responding to the control signal above that, in order to adjust the direction which it is related to the sound wave which is connected to acoustic transducer dynamically the variable refraction acoustic lens which is formed (140,2200,3200,4200,542) with it possesses.カテーテル装置(100,2000,3000,4000,540)は、近位端(112)及び遠位端(114)を有する伸長体(110)と、この伸長体(110)の遠位端(114)の近くに配置される音響トランスデューサ(130,2300,3300,4300,544)と、自身に供給される1又はそれ以上の制御信号に応答して音響トランスデューサへ結合される音波に関連する方向を動的に調整するよう構成される可変屈折音響レンズ(140,2200,3200,4200,542)とを有する。