Localization of brain landmarks such as the anterior and posterior commissures based on geometrical fitting

A system for estimating the position of one or more landmarks, including at least one of the AC and PC landmarks, within an image of the brain of an individual, the system including a processor arranged to:

• (a) receive the image of the brain of the individual;
• (b) register a plurality of points on the image which are on the surface of the brain;
• (c) use the identified points to construct a geometrical object in the space of the image and defined by a plurality of parameter values;
• and
• (d) using the geometrical object, and one or more predefined numerical values representative of typical individuals, to estimate the position of the one or more landmarks.

A computer program product comprising software which, upon being run by a computer system, causes the computer system to estimate the position of one or more landmarks, including at least one of the AC and PC landmarks, within an image of the brain of an individual, by:

• (a) registering the choice of a plurality of points in the image which are on the surface of the brain;
• (b) using the identified points to construct a geometrical object in the space of the image and defined by a plurality of parameter values;
• and
• (c) using the geometrical object, and one or more predefined numerical values representative of typical individuals, to estimate the position of the one or more landmarks.