Mostafa Analoui & Joseph D. Bronzino 
Medical Imaging [PDF ebook] 
Principles and Practices

The discovery of x-ray, as a landmark event, enabled us to see the ’invisible, ’ opening a new era in medical diagnostics. More importantly, it offered a unique undestanding around the interaction of electromagnetic signal with human tissue and the utility of its selective absorption, scattering, diffusion, and reflection as a tool for understanding