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I'm looking for the contactless methods to collect the information of the body construction especially skeletal structure to calculate in the computer model . Are there physical methods to inspect internal side of the body other than X-ray and no any exposure of radiation ? For example, echo , MRI and so on .

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It depends what you consider "radiation". Ultrasound doesn't involve radition. MRI involves radiowaves, which are electro-magnetic radiation (but not ionizing radiation). Proton Imaging and Neutron Imaging do not directly involve electro-magnetic radiation, but the term ionizing radiation is usually defined to include particles that cause ionization regardless of whether the particles are photons (electro-magnetic radiation).

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