The invention relates to a system (200) for displaying images comprised in a stack of images on a display, the system comprising a path unit (210) for updating path data for determining a next position of a lumen indicator for indicating a next lumen in a next image comprised in the stack of images, wherein updating the path data is based on a current position of a lumen indicator for indicating a current lumen in a current image comprised in the stack of images, an input unit (220) for receiving a user input for selecting a next image from the stack of images, an image unit (230) for selecting the next image from the stack of images for displaying on the display, based on the user input, and an indicator unit (240) for determining the next position of the lumen indicator based on the path data and user input. The user input for selecting the next image from the stack of images comprises an input for an intuitive navigation up and down the stack of images. Advantageously, the system (200) also allows inspecting images which do not comprise a current lumen, e.g., images based on slices of data located above colon flexures, because manual navigation allows viewing every image comprised in the stack of images.