A device for vascular treatment outcome visualization, comprising; - a processing unit; - an interface unit; and - a display unit; wherein the interface unit is configured to provide the processing unit with first image data of a region of interest of a vascular structure at a first point in time; and to provide the processing unit with at least second image data of the region of interest of a vascular structure at a second point in time; wherein, between the first point in time and the second point in time, a vascular treatment is applied to the vascular structure; wherein the first point in time relates to a pre-treatment state, and the second point in time relates to a post-treatment state; wherein between the pre-treatment state and the post-treatment state, a medical intervention has been performed affecting the vascular structure in the region of interest; wherein the processing unit is configured to combine the first and the at least one second image data to generate a joint outcome visualization image data; wherein the display unit is configured to display the joint outcome visualization image data; wherein, for the joint outcome visualization image data, the processing unit is configured to generate an image showing a lumen of the vasculature before and after the vascular treatment, wherein the image is showing the lumen before stenting overlaid to the lumen after stenting; and wherein, as the first image data, a first angiographic image from a first sequence of first angiographic images is selected; and, as the second image data, a second angiographic image from a second sequence of second angiographic images is selected; wherein as first image and as second image the best-injected images or the images of the highest contrast are selected, and wherein the vascular treatment comprises a placement of a predetermined medical device inside the vascular structure. - a processing unit; - an interface unit; and - a display unit; wherein the interface unit is configured to provide the processing unit with first image data of a region of interest of a vascular structure at a first point in time; and to provide the processing unit with at least second image data of the region of interest of a vascular structure at a second point in time; wherein, between the first point in time and the second point in time, a vascular treatment is applied to the vascular structure; wherein the first point in time relates to a pre-treatment state, and the second point in time relates to a post-treatment state; wherein between the pre-treatment state and the post-treatment state, a medical intervention has been performed affecting the vascular structure in the region of interest; wherein the processing unit is configured to combine the first and the at least one second image data to generate a joint outcome visualization image data; wherein the display unit is configured to display the joint outcome visualization image data; wherein, for the joint outcome visualization image data, the processing unit is configured to generate an image showing a lumen of the vasculature before and after the vascular treatment, wherein the image is showing the lumen before stenting overlaid to the lumen after stenting; and wherein, as the first image data, a first angiographic image from a first sequence of first angiographic images is selected; and, as the second image data, a second angiographic image from a second sequence of second angiographic images is selected; wherein as first image and as second image the best-injected images or the images of the highest contrast are selected, and wherein the vascular treatment comprises a placement of a predetermined medical device inside the vascular structure.