Philips DICOM Viewer is used to view DICOM files, but lacks features to create 3D images from the loaded images. As far as I know, DICOM files required advanced applications in order to manipulate them. Also, the machine that creates these DICOM/MRI files need to support the 3D creation to export directly to the desired files. You can't put many images into one file and create 3D files, this is the job of the dedicated application that works with the machine that scans the human body.
Contact the seller of the MRI device and ask about this possibility, because there could be a simple option available within the software you use to scan the body and create the scanning.