A method for determining wall thickness of an anatomic detail, in particular of the heart, of a subject of interest by magnetic resonance imaging, the method comprising steps of - defining, on a surface representation of at least a portion of the anatomic detail, and based on operator input, at least a first location and a second location on the surface representation; - generating a line-structure of interest, wherein the line-structure comprises a plurality of locations on the surface representation, including the first location and the second location; - determining, for each location of the plurality of locations, a normal direction that is perpendicular to the surface of the anatomic detail at the location; - determining a mean normal direction from the determined normal directions of the plurality of locations; - determining a mean imaging plane being defined by the linear span of a vector having the mean normal direction and a vector that is arranged parallel to a straight line connecting the first location and the second location; - determining a measure that is representative of angular deviations (Δβ i) of the determined normal directions of the plurality of locations from the mean imaging plane; - based on the determined measure, determining at least a second imaging plane, wherein the at least second imaging plane is generated by rotating the mean imaging plane about an axis given by the straight line connecting the first location and the second location; - determining the measure that is representative of angular deviations of the determined normal directions of the plurality of locations with regard to the second imaging plane; - acquiring magnetic resonance images for all imaging planes (68, 70); and - determining the wall thickness at a specific location of the plurality of locations from the magnetic resonance image acquired in that imaging plane of the imaging planes that has the lowest angular deviation to the normal direction at the specific location. - defining, on a surface representation of at least a portion of the anatomic detail, and based on operator input, at least a first location and a second location on the surface representation; - generating a line-structure of interest, wherein the line-structure comprises a plurality of locations on the surface representation, including the first location and the second location; - determining, for each location of the plurality of locations, a normal direction that is perpendicular to the surface of the anatomic detail at the location; - determining a mean normal direction from the determined normal directions of the plurality of locations; - determining a mean imaging plane being defined by the linear span of a vector having the mean normal direction and a vector that is arranged parallel to a straight line connecting the first location and the second location; - determining a measure that is representative of angular deviations (Δβ i) of the determined normal directions of the plurality of locations from the mean imaging plane; - based on the determined measure, determining at least a second imaging plane, wherein the at least second imaging plane is generated by rotating the mean imaging plane about an axis given by the straight line connecting the first location and the second location; - determining the measure that is representative of angular deviations of the determined normal directions of the plurality of locations with regard to the second imaging plane; - acquiring magnetic resonance images for all imaging planes (68, 70); and - determining the wall thickness at a specific location of the plurality of locations from the magnetic resonance image acquired in that imaging plane of the imaging planes that has the lowest angular deviation to the normal direction at the specific location.