Why can’t we just put the mummies through a CT or MRI scanner? If the ink used in the writing found here or other components deeper inside the artifact have di

Why can’t we just put the mummies through a CT or MRI scanner? If the ink used in the writing found here or other components deeper inside the artifact have different densities, a CT scan could detect that and pose no harm to the specimen. Assuming no metal is used in the mummies, MRI or MR spectroscopy could potentially give more insight into chemical composition and differentiate isodense parts.