Abstract: A non-spectral computed tomography scanner includes a radiation source configured to emit x-ray radiation, a detector array configured to detect x-ray radiation and generate non-spectral data, and a memory configured to store a spectral image module that includes computer executable instructions including a neural network trained to produce spectral volumetric image data. The neural network is trained with training spectral volumetric image data and training non-spectral data. The non-spectral computed tomography scanner further includes a processor configured to process the non-spectral data with the trained neural network to produce spectral volumetric image data.

Abstract: Described herein are techniques for making a multiplayer zirconia sintered body. The techniques sinter a dental article to form the zirconia sintered body. The dental article includes multiple layers containing dental ceramic materials such as, zirconia oxide particles, yttria, a pigment, etc. In some implementations, the dental article may be partially sintered and coated using an organic material.