@incollection{Gazis19, author = {Evangelos Gazis}, title = {The Ionizing Radiation Interaction with Matter, the X-ray Computed Tomography Imaging, the Nuclear Medicine SPECT, PET and PET-CT Tomography Imaging}, booktitle = {Medical Imaging}, publisher = {IntechOpen}, address = {Rijeka}, year = {2019}, editor = {Yongxia Zhou}, chapter = {3}, doi = {10.5772/intechopen.84356}, url = {https://doi.org/10.5772/intechopen.84356} }