PROBLEM TO BE SOLVED: To provide a catheter for diagnostic imaging which can satisfactorily be delivered to a lesion where narrowing is developed.SOLUTION: A catheter for diagnostic imaging 100 comprises: a drive shaft 140 which is provided with a signal receiving part 145a at its tip and capable of rotating, advancing and treating； a sheath 110 which extends axially and has the drive shaft inserted therein； a first lumen 115a which is formed on the peripheral side of the sheath and can have a guide wire W inserted therethrough； and a second lumen 114a which is formed at a position on the tip side of the sheath and inside axially with respect to the first lumen and can have the guide wire inserted therethrough.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】狭窄が進行した病変部に好適に送達することのできる画像診断用カテーテルを提供する。【解決手段】画像診断用カテーテル１００は、先端部に信号送受信部１４５ａが設けられ、回転および進退移動可能な駆動シャフト１４０と、軸方向に延在し駆動シャフトが挿入されるシース１１０と、シースの外周側に形成され、ガイドワイヤＷが挿通可能な第１ルーメン１１５ａと、シースの先端側であって第１ルーメンに対して径方向の内方に形成され、ガイドワイヤが挿通可能な第２ルーメン１１４ａと、を有する。【選択図】図３
