A method for repositioning a mobile imaging system includes:a) capturing an image recording of at least one optical marker as a reference variable which is disposed close to an examination and/or treatment area of an object,b) capturing the image recording direction as a further reference variable,c) wherein the capturing mobile imaging system is in a predefined position and/or alignment suitable for image recording,d) detecting a changed and/or non-capturable position of the at least one optical marker and/or a changed and/or non-capturable image recording direction, ande) repositioning the mobile imaging system using a comparison of the reference variables from a) and b) with the respectively corresponding reference variables from d). An image capturing unit and an optical marker are also provided.
