X-ray Detectors in Medical Imaging -- Modelling spectroscopic performance of pixelated semiconductor detectors through Monte-Carlo simulation -- Status of DEXA Instrumentation Using Direct and Indirect Detectors -- CZT Detectors for Nuclear Medicine -- Positron Emission Tomography (PET) Imaging Based on Sub-Millimeter Pixelated CdZnTe Detectors -- Medical Photon-Counting CT - Status and Clinical Applications Review -- Multi-material decomposition (m-MD) based spectral imaging in photon-counting CT -- X-ray Multispectral CT Imaging by Projection Sequences Blind Separation based on Basis-effect or Basis-material decomposition -- Direct Iterative Basis Image Reconstruction Based on MAP-EM Algorithm for Spectral CT -- Linearly Polarized X-ray Fluorescence Computed Tomography with a Photon Counting Detector -- Detector shift iteration method for improving spatial resolution and suppressing pixel value distortion in direct and indirect X-ray detectors -- A new method of estimating incident x-ray spectra with photon counting detectors using a limited number of energy bins with dedicated clinical x-ray imaging systems.