: The X-ray source and electronic detector array rotate around the patient to take measurements from many angles. 2. Image Formation & Reconstruction
: A scale used to quantify tissue density, where water is 0 HU and air is -1,000 HU. 3. Technological Evolutions
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 geometric principle used to reconstruct a 2D object from its measured projections.
: The scanner measures how much an X-ray beam is attenuated (weakened) as it passes through different tissues. Beer-Lambert Law : This physical law (
The technology has evolved through several "generations" to improve speed and quality:
: A common algorithm used to solve for attenuation coefficients in each anatomical slice.