1. A system ( 100 ) for determining a property of blur in an image ( 202 ), the system ( 100 ) comprising: a receiver ( 102 ) for receiving the image ( 202 ) of an object-of-interest ( 212 , 220 , 302 , 408 ) of a body, the image ( 202 ) comprising blur, a determining subsystem ( 122 ) for determining a value of a characteristic of the blur in the image ( 202 ) on individual lines of a plurality of lines ( 206 , 208 , 214 , 216 , 308 ) intersecting with the object-of-interest ( 212 , 220 , 302 , 408 ) at different angles and thus extending in different directions, wherein the determination of the value comprises analyzing the image ( 202 ) along the respective lines ( 206 , 208 , 214 , 216 , 308 ), and an obtaining subsystem ( 126 ) for obtaining a direction ( 214 , 406 ) in which the value of the characteristic of the blur is maximal, based on the determined values on the individual lines of the plurality of lines ( 206 , 208 , 214 , 216 , 308 ), which lines extend in different directions.