A method for determining wall thickness of an anatomic detail (52), in particular of the heart, of a subject of interest (20) by magnetic resonance imaging, comprising steps of—defining (82) a first location (54) and a second location (56) on a surface representation；—generating (84) a line-structure of interest (60),—determining (86), for each location (62) of a plurality of locations (62), a normal direction (64)；—determining (88) a mean normal direction (66)；—determining (90) a mean imaging plane (68)；—determining (92) a measure that is representative of angular deviations (4(3,) of the determined normal directions (64)；—based on the determined measure, determining (96) imaging planes (70)；—determining (98) deviations of the determined normal directions (64) to the imaging planes (70)；—acquiring (100) magnetic resonance images for all imaging planes (68, 70)； and—determining (102) the wall thickness at a specific location (62) from the magnetic resonance image acquired in that imaging plane (70) that has the lowest angular deviation to the normal direction (64) at the specific location (62)； a magnetic resonance imaging system (10) having a control unit (26) that is configured to carry out steps (78-102) of such a method； and a software module (50) for carrying out such a method, wherein the method steps (78-102) to be conducted are converted into a program code that is implementable in a memory unit (28) and is executable by a processor unit (30) of the magnetic resonance imaging system (10).
