A method of visualising a dynamic anatomical structure, the method comprising the steps of a) providing a sequence of three-dimensional medical images (M 1, M 2, M 3,... M Z) spanning a time period, each three-dimensional medical image of the sequence showing the dynamic anatomical structure at a point in time during the time period; b) providing a dynamic model of at least a part of the dynamic anatomical structure, wherein the dynamic model is a simplification of the dynamic anatomical structure which follows the movement of the dynamic anatomical structure across the time period, and which has been derived from and is registered with the sequence of three-dimensional medical images (M 1, M 2, M 3,... M Z); c) determining a volume of interest containing an anatomical feature of interest within each of the three-dimensional images (M 1, M 2, M 3,... M Z), wherein the volume of interest follows the position and/or the shape of the anatomical feature of interest across the time period, wherein the volume of interest is smaller than the complete field of view of the three-dimensional medical images (M 1, M 2, M 3,... M Z), and wherein the volume of interest is defined by identifying a set of landmark points of the anatomical feature of interest, by defining an approximation surface spanning the set of landmark points, and by defining a volume extending above and/or below and/or to the side of the approximation surface; and d) providing a three-dimensional visualisation environment (50, 70) as part of a user interface for displaying the dynamic anatomical structure across the time period, wherein a visualisation corresponding to a particular point in time within the time period comprises (i) a volume rendering only of the volume of interest of the three-dimensional image corresponding to the particular point in time; and (ii) a visualisation of the dynamic model at the particular point in time and in the same coordinate system as the volume rendering of the volume of interest. a) providing a sequence of three-dimensional medical images (M 1, M 2, M 3,... M Z) spanning a time period, each three-dimensional medical image of the sequence showing the dynamic anatomical structure at a point in time during the time period; b) providing a dynamic model of at least a part of the dynamic anatomical structure, wherein the dynamic model is a simplification of the dynamic anatomical structure which follows the movement of the dynamic anatomical structure across the time period, and which has been derived from and is registered with the sequence of three-dimensional medical images (M 1, M 2, M 3,... M Z); c) determining a volume of interest containing an anatomical feature of interest within each of the three-dimensional images (M 1, M 2, M 3,... M Z), wherein the volume of interest follows the position and/or the shape of the anatomical feature of interest across the time period, wherein the volume of interest is smaller than the complete field of view of the three-dimensional medical images (M 1, M 2, M 3,... M Z), and wherein the volume of interest is defined by identifying a set of landmark points of the anatomical feature of interest, by defining an approximation surface spanning the set of landmark points, and by defining a volume extending above and/or below and/or to the side of the approximation surface; and d) providing a three-dimensional visualisation environment (50, 70) as part of a user interface for displaying the dynamic anatomical structure across the time period, wherein a visualisation corresponding to a particular point in time within the time period comprises (i) a volume rendering only of the volume of interest of the three-dimensional image corresponding to the particular point in time; and (ii) a visualisation of the dynamic model at the particular point in time and in the same coordinate system as the volume rendering of the volume of interest.