A system for visualizing, in a first bull's eye plot, results of a first quantitative analysis of an object represented in first image data, the first image data comprising a first plurality of data slices, the system comprising: - a slice unit for associating a data slice of the first plurality of data slices with a concentric ring of the first bull's eye plot; - a radius unit for computing the length of a radius of the concentric ring of the first bull's eye plot; and - a value unit for computing at least one value for displaying in the concentric ring of the first bull's eye plot, on the basis of the data slice associated with the concentric ring of the first bull's eye plot; and wherein the length of the radius of the concentric ring of the first bull's eye plot is defined on the basis of the position of the data slice, of the first plurality of data slices, associated with the concentric ring of the first bull's eye plot, with respect to the object; wherein the system is further adapted for visualizing, in a second bull's eye plot, results of a second quantitative analysis of the object represented in second image data, the second image data comprising a second plurality of data slices, wherein: - the slice unit is adapted for associating a data slice of the second plurality of data slices with a concentric ring of the second bull's eye plot; - the radius unit is adapted for computing the length of a radius of the concentric ring of the second bull's eye plot; and - the value unit is adapted for computing at least one value for displaying in the concentric ring of the second bull's eye plot on the basis of the data slice associated with the concentric ring of the second bull's eye plot; and wherein the length of the radius of the concentric ring of the second bull's eye plot is defined on the basis of the position of the data slice, of the second plurality of data slices, associated with the concentric ring of the second bull's eye plot, with respect to the object; characterised in that the system further comprises: - an indicator input unit for receiving a user input for indicating a first location in the first bull's eye plot, using a first indicator, and a second location in the second bull's eye plot, using a second indicator; and - an indicator unit for indicating the first location in the first bull's eye plot, using the first indicator, and the second location in the second bull's eye plot, using the second indicator, based on the user input; wherein the first and second locations are the same relative to the respective first and second bull's eye plots. - a slice unit for associating a data slice of the first plurality of data slices with a concentric ring of the first bull's eye plot; - a radius unit for computing the length of a radius of the concentric ring of the first bull's eye plot; and - a value unit for computing at least one value for displaying in the concentric ring of the first bull's eye plot, on the basis of the data slice associated with the concentric ring of the first bull's eye plot; - the slice unit is adapted for associating a data slice of the second plurality of data slices with a concentric ring of the second bull's eye plot; - the radius unit is adapted for computing the length of a radius of the concentric ring of the second bull's eye plot; and - the value unit is adapted for computing at least one value for displaying in the concentric ring of the second bull's eye plot on the basis of the data slice associated with the concentric ring of the second bull's eye plot; - an indicator input unit for receiving a user input for indicating a first location in the first bull's eye plot, using a first indicator, and a second location in the second bull's eye plot, using a second indicator; and - an indicator unit for indicating the first location in the first bull's eye plot, using the first indicator, and the second location in the second bull's eye plot, using the second indicator, based on the user input;