A method of creating and simultaneously displaying medical scan images, from each of: (i) a first medical scan dataset, obtained by scanning a 3-dimensional (3-D) object with a first scanning modality; and (ii) a second medical scan dataset, obtained by scanning the 3-dimensional (3-D) object with a second scanning modality; wherein the first and second medical scan datasets are 3-dimensional (3-D) datasets; and wherein at least the first medical scan dataset is a multi-volume dataset, comprising at least a first volume and a second volume; the method comprising: deriving a first image from a volume reconstruction of the first volume of the first medical scan dataset, whereby the view orientation is automatically adjusted so that the first image lies in a first plane, the first plane corresponding to an acquisition plane of the first volume of the first medical scan dataset; obtaining a second image from a volume reconstruction of the second medical scan dataset, whereby the view orientation is automatically adjusted so that the second image lies in the first plane; and displaying the first image and the second image simultaneously, wherein the method further comprises, in response to the user selecting to display a further image from the second volume of the first medical scan dataset: deriving a third image from a volume reconstruction of the second volume of the first dataset, whereby the view orientation is automatically adjusted so that the third image lies in a second plane, the second plane corresponding to an acquisition plane of the second volume of the first medical scan dataset; obtaining a fourth image from a volume reconstruction of the second dataset, whereby the view orientation is automatically adjusted so that the fourth image lies in the second plane; and displaying the third image and the fourth image simultaneously. (i) a first medical scan dataset, obtained by scanning a 3-dimensional (3-D) object with a first scanning modality; and (ii) a second medical scan dataset, obtained by scanning the 3-dimensional (3-D) object with a second scanning modality; deriving a first image from a volume reconstruction of the first volume of the first medical scan dataset, whereby the view orientation is automatically adjusted so that the first image lies in a first plane, the first plane corresponding to an acquisition plane of the first volume of the first medical scan dataset; obtaining a second image from a volume reconstruction of the second medical scan dataset, whereby the view orientation is automatically adjusted so that the second image lies in the first plane; and displaying the first image and the second image simultaneously, wherein the method further comprises, in response to the user selecting to display a further image from the second volume of the first medical scan dataset: deriving a third image from a volume reconstruction of the second volume of the first dataset, whereby the view orientation is automatically adjusted so that the third image lies in a second plane, the second plane corresponding to an acquisition plane of the second volume of the first medical scan dataset; obtaining a fourth image from a volume reconstruction of the second dataset, whereby the view orientation is automatically adjusted so that the fourth image lies in the second plane; and displaying the third image and the fourth image simultaneously. deriving a third image from a volume reconstruction of the second volume of the first dataset, whereby the view orientation is automatically adjusted so that the third image lies in a second plane, the second plane corresponding to an acquisition plane of the second volume of the first medical scan dataset; obtaining a fourth image from a volume reconstruction of the second dataset, whereby the view orientation is automatically adjusted so that the fourth image lies in the second plane; and displaying the third image and the fourth image simultaneously.