A patient marker: - wherein, the marker is configured to be placed on or inside a patient; - wherein, the marker comprises a specific structure; - wherein, when the marker is placed on or inside the patient, and the patient is positioned at least partially within an image acquisition unit of an imaging system, wherein the marker is compatible with both the image acquisition unit when it is an X-ray unit and with the image acquisition unit when it is an MRI unit, and wherein the marker is configured such that an image acquired by the imaging system comprises image data of the specific structure of the marker; - wherein, the marker is configured such that image data of the specific structure of the marker comprises information useable to identify the marker when the image acquisition unit is the X-ray unit and the marker is configured such that image data of the specific structure of the marker comprises information useable to identify the marker when the image acquisition unit is the MRI unit; and - wherein, the marker is configured such that image data of the specific structure of the marker comprises information useable to define at least one parameter relating to an examination of the patient comprising information useable to set a scanning protocol and/or parameter setting of the image acquisition unit when the image acquisition unit is the X-ray unit and the marker is configured such that image data of the specific structure of the marker comprises information useable to define at least one parameter relating to an examination of the patient comprising information useable to set a scanning protocol and/or parameter setting of the image acquisition unit when the image acquisition unit is the MRI unit. - wherein, the marker is configured to be placed on or inside a patient; - wherein, the marker comprises a specific structure; - wherein, when the marker is placed on or inside the patient, and the patient is positioned at least partially within an image acquisition unit of an imaging system, wherein the marker is compatible with both the image acquisition unit when it is an X-ray unit and with the image acquisition unit when it is an MRI unit, and wherein the marker is configured such that an image acquired by the imaging system comprises image data of the specific structure of the marker; - wherein, the marker is configured such that image data of the specific structure of the marker comprises information useable to identify the marker when the image acquisition unit is the X-ray unit and the marker is configured such that image data of the specific structure of the marker comprises information useable to identify the marker when the image acquisition unit is the MRI unit; and - wherein, the marker is configured such that image data of the specific structure of the marker comprises information useable to define at least one parameter relating to an examination of the patient comprising information useable to set a scanning protocol and/or parameter setting of the image acquisition unit when the image acquisition unit is the X-ray unit and the marker is configured such that image data of the specific structure of the marker comprises information useable to define at least one parameter relating to an examination of the patient comprising information useable to set a scanning protocol and/or parameter setting of the image acquisition unit when the image acquisition unit is the MRI unit.