Cone Beam Computer Tomography (CBCT) or a CT machine are necessary hardware to takes images of the patient for further processing through virtual implant placement software. There are many companies offering CBCT scanners on the market today and acquisition costs are declining.
Important hardware factors to consider are the field of view (FOV) and slice thickness produced by either the CBCT or CT scanner. In general a hospital grade CT scanner will produce thinner slices (0.2mm) and has a greater FOV (size of the image taken). A CBCT scanner generates thicker slices (0.5mm and up) and a smaller FOV. Slice thickness of more than 1mm  is detrimental and results in a data set unusable for virtual implant planning. Thinner slices are more desirable because more diagnostic information can be extracted but thinner slices increase the size of the data set (computer memory) considerably. Larger data sets demand greater computing power to manipulate and render the images with the implant placement software. An independent and in depth introduction relating to CBCT hardware and software requirements can be found on Dr. Aaron Molens website.

CBCT scanners

i-CAT® by Imaging Sciences International

PreXion 3D by PreXion Inc.

GALILEOS by Sirona