Method for positioning a body region of a patient for a radiography acquisition by a radiography system, comprising the steps: a) providing an examination requirement for the body region; b) pre-positioning the body region in the radiography system for the radiography acquisition; c) pre-positioning an acquisition unit of the radiography system for the radiography acquisition; d) producing a three-dimensional positioning acquisition of the body region using a 3D camera system; e) producing a preview image from the positioning acquisition, wherein first, a patient model is generated from the positioning acquisition, and the preview image is produced from this patient model, and wherein the preview image depicts a representation as it would be made using the acquisition unit of the radiography system as intended in the pre-positioning adopted in step c) and constitutes a simulation of a subsequent radiography acquisition; f) outputting the preview image and/or positioning information based on the preview image, wherein an automatic analysis of the preview image is performed to ascertain whether it represents the body region correctly in accordance with the examination requirement for the radiography acquisition, characterised in that the output of the positioning information is implemented using a visual and/or audible indicator and contains information in the form of pictorial representations or voice commands on how the setpoint position appears and/or contains navigation information, and/or the output of the positioning information comprises displaying a change in a light field of the radiography system, wherein the brightness and/or colour of the light field changes as soon as correct positioning is achieved. a) providing an examination requirement for the body region; b) pre-positioning the body region in the radiography system for the radiography acquisition; c) pre-positioning an acquisition unit of the radiography system for the radiography acquisition; d) producing a three-dimensional positioning acquisition of the body region using a 3D camera system; e) producing a preview image from the positioning acquisition, wherein first, a patient model is generated from the positioning acquisition, and the preview image is produced from this patient model, and wherein the preview image depicts a representation as it would be made using the acquisition unit of the radiography system as intended in the pre-positioning adopted in step c) and constitutes a simulation of a subsequent radiography acquisition; f) outputting the preview image and/or positioning information based on the preview image, wherein an automatic analysis of the preview image is performed to ascertain whether it represents the body region correctly in accordance with the examination requirement for the radiography acquisition, characterised in that the output of the positioning information is implemented using a visual and/or audible indicator and contains information in the form of pictorial representations or voice commands on how the setpoint position appears and/or contains navigation information, and/or the output of the positioning information comprises displaying a change in a light field of the radiography system, wherein the brightness and/or colour of the light field changes as soon as correct positioning is achieved.