Hounsfield Units Explained: CT Number Basics for Radiology Physics

Hounsfield units (HU) quantify tissue attenuation in CT, calculated from linear attenuation coefficients relative to water. This video explains HU calculation and clinical importance—high-yield for radiology physics exams, covering a core concept for board prep.

• Explains the definition and calculation of Hounsfield units from linear attenuation coefficients.
• Highlights clinical relevance for tissue differentiation and pathology detection on CT.
• Part of a radiology physics series aimed at board exam preparation; best supplemented with standard textbooks.

RadPigeon summaries are original and for information only. They are not clinical advice.