Understanding CT Pixel Values in Medical Imaging: A Practical Guide to Hounsfield Units (HU)
Computed Tomography (CT) images encode tissue density using Hounsfield Units (HU), a standardized scale critical for radiology and medical AI. This guide explains how CT pixel values are converted to HU, why HU consistency matters for clinical interpretation and AI model training, and how HU-aware workflows enable reliable, scanner-agnostic CT analysis.