Augmented Reality (AR) applications have strong growth potential in clinical practices such as needle biopsy and surgery guidance and require important amounts of video data to be transferred with very low latency. In this context, devices and wires see their numbers grow in the Operating Room (OR) and a way to reduce this number is to use 5G transmission. The goal of this paper is to start demonstrating and measuring 5G capabilities inside the OR by setting up a real time AR application merging images from two medical modalities and over a 5G network. To provide a precise synchronization of the different incoming images, we will operate DICOM-RTV [1] (Real Time video) streams.