: The scanner measures how much an X-ray beam is attenuated (weakened) as it passes through different tissues. Beer-Lambert Law : This physical law (

) governs the intensity variation of the beam based on the material's linear attenuation coefficient (

This report summarizes the fundamental principles of (TDM), also known as CT scanning, as detailed in various academic and professional resources including course materials from Urofrance and the Collège des Enseignants de Radiologie de France (CERF) . 1. Fundamental Principles

: The X-ray source and electronic detector array rotate around the patient to take measurements from many angles. 2. Image Formation & Reconstruction

: A common algorithm used to solve for attenuation coefficients in each anatomical slice.