System and method for image processing

A method of processing images in a computing device having a memory, an input device, a display and a processor interconnected with the memory, the input device and the display, the method comprising:

• acquiring a three-dimensional image of an anatomical structure of a patient and storing the three-dimensional image in the memory;
• at the processor, rendering on the display (i) an initial volume of the three-dimensional image corresponding to an initial portion of the anatomical structure, and (ii) a moveable control element corresponding to a plurality of intersecting planes;
• the initial volume having an initial outer surface defined by a position of the control element;
• receiving, at the processor from the input device, input data updating the position of the control element on the display relative to the initial volume;
• responsive to receiving the input data, controlling the display at the processor to render, in place of the initial volume, a further volume of the three-dimensional image, corresponding to a further portion of the anatomical structure and having a further outer surface defined by the updated position of the control element;
• the further volume selected at the processor by identifying a portion of the three-dimensional image that intersects with one of a plurality of quadrants defined by the intersecting planes, and excluding the identified portion from the further volume.