A phantom is an object used to evaluate the performance of a CT system. Various types of phantoms are available for different evaluation items. They are also used as calibration templates.
It's not a Rolls Royce Phantom.
You may create original phantoms or use commercially available phantoms. Phantom is available from the following manufacturers:
https://www.qrm.de/en/
https://www.phantomlab.com/
https://www.cirsinc.com/
https://www.pureimagingphantoms.com/
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