The present invention relates to displaying spatial information of an interventional device in a live 2D X-ray image. In order to provide a facilitated visualization technique to provide 3D information of a subject, a device (10) for providing spatial information of an interventional device in a live 2D X-ray image is provided. The device comprises an input unit (12), and a processing unit (16). The input unit is configured to provide an actual 2D X-ray image (18) of a region of interest related to a portion of a patient's body. A target location (22) lies within the region of interest. At least a portion (20) of an interventional device is arranged in the region of interest. The input unit is configured to provide actual 3D ultrasound data of at least a part of the region of interest and at least a portion of an interventional device (19). The target location (22) lies within the region of interest. The processing unit is configured to register the actual 3D ultrasound data to the actual 2D X-ray image. The processing unit is also configured to identify the target location in the 3D ultrasound data, and to determine, based on the actual 3D ultrasound data, a spatial relation between the portion of the interventional device and the target location, to retrieve a distance value in a projection direction of the actual 2D X-ray image from the spatial relation, and, based on the distance value, to generate a graphical representation (32) indicative of the spatial relation, the graphical representation to be displayed with the actual 2D X-ray image.