1. A medical imaging device ( 19 ) for providing an image representation ( 9 ) supporting positioning of an intervention device ( 3 , 4 ) in a region of interest during an intervention procedure, the medical imaging device being adapted for performing the following steps: (i) acquiring (S 1 ) a pre-live anatomy image ( 1 ) including the region of interest; (ii) acquiring (S 2 ) a live anatomy image ( 2 ) including the region of interest using a live image acquisition device ( 10 ) comprising an adjustable collimator device ( 13 ) with the collimator device being in previously set settings; (iii) identifying (S 3 ) a location ( 5 ) of the intervention device within the live anatomy image; (iv) adjusting (S 4 ) settings of the collimator device based on the identified location of the intervention device for subsequently acquiring a further live anatomy image including the region of interest using the live image acquisition device with the collimator device being in the adjusted settings; (v) providing (S 5 ) the image representation by merging information from the live anatomy image into the pre-live anatomy image.