An ultrasound imaging system for providing a three-dimensional image of a volume and for determining a distance between a first point and a second point in the three-dimensional image, the ultrasound imaging system comprising: a transducer array configured to provide an ultrasound receive signal, a controlling unit configured to receive the ultrasound receive signal and to provide display data representing the three-dimensional image, wherein the controlling unit is further configured to determine a distance between the first point and the second point identified in the three-dimensional image, a display configured to receive the display data and to display the three-dimensional image of the volume and a cursor for identifying the first point and the second point, and an input device configured to provide input data to the controlling unit, wherein the input data includes a movement of the cursor, wherein the ultrasound imaging system is configured to enable a user to perform a first movement of the cursor parallel to a plane displayed to the user when viewing the three-dimensional image displayed on the display based on input data, to identify a first coordinate and a second coordinate of at least one of the first and second points; and characterised in that the ultrasound imaging system is further configured to: without changing a perspective of the view displayed on the display, enable the user to perform a second movement of the cursor perpendicular to the plane that is displayed and into the three dimensional image, based on input data, to identify a third coordinate of the respective point, and wherein, during the second movement of the cursor perpendicular to the plane displayed on the display, the ultrasound imaging system is further configured to provide an indication on the display when the cursor touches a structure within the volume so as to inform the user that the cursor has touched the structure and so that the user may place the cursor properly on the structure in the direction perpendicular to the plane displayed on the display. a transducer array configured to provide an ultrasound receive signal, a controlling unit configured to receive the ultrasound receive signal and to provide display data representing the three-dimensional image, wherein the controlling unit is further configured to determine a distance between the first point and the second point identified in the three-dimensional image, a display configured to receive the display data and to display the three-dimensional image of the volume and a cursor for identifying the first point and the second point, and an input device configured to provide input data to the controlling unit, wherein the input data includes a movement of the cursor, wherein the ultrasound imaging system is configured to enable a user to perform a first movement of the cursor parallel to a plane displayed to the user when viewing the three-dimensional image displayed on the display based on input data, to identify a first coordinate and a second coordinate of at least one of the first and second points; and characterised in that the ultrasound imaging system is further configured to: without changing a perspective of the view displayed on the display, enable the user to perform a second movement of the cursor perpendicular to the plane that is displayed and into the three dimensional image, based on input data, to identify a third coordinate of the respective point, and wherein, during the second movement of the cursor perpendicular to the plane displayed on the display, the ultrasound imaging system is further configured to provide an indication on the display when the cursor touches a structure within the volume so as to inform the user that the cursor has touched the structure and so that the user may place the cursor properly on the structure in the direction perpendicular to the plane displayed on the display. without changing a perspective of the view displayed on the display, enable the user to perform a second movement of the cursor perpendicular to the plane that is displayed and into the three dimensional image, based on input data, to identify a third coordinate of the respective point, and wherein, during the second movement of the cursor perpendicular to the plane displayed on the display, the ultrasound imaging system is further configured to provide an indication on the display when the cursor touches a structure within the volume so as to inform the user that the cursor has touched the structure and so that the user may place the cursor properly on the structure in the direction perpendicular to the plane displayed on the display.