What does HU stand for?

What does HU stand for?

• A. Radiodensity unit
• B. Hyperdensity factor
• C. Hounsfield unit
• D. Hounsfield density

Answer: (C)

The main concept is that CT radiodensity is quantified on a standardized scale called the Hounsfield scale, with the abbreviation HU representing a Hounsfield unit. This unit is defined to make measurements of how much X-ray attenuation tissues produce comparable across scanners. Water is set to 0 HU, air to about -1000 HU, and dense bone can exceed +1000 HU. The term honors Sir Godfrey Hounsfield, the inventor of CT, which is why the label is Hounsfield unit. The other options don’t reflect the established terminology: they use vague or nonstandard phrases, whereas HU specifically stands for Hounsfield unit and is the standard name for this CT density measurement.

The main concept is that CT radiodensity is quantified on a standardized scale called the Hounsfield scale, with the abbreviation HU representing a Hounsfield unit. This unit is defined to make measurements of how much X-ray attenuation tissues produce comparable across scanners. Water is set to 0 HU, air to about -1000 HU, and dense bone can exceed +1000 HU. The term honors Sir Godfrey Hounsfield, the inventor of CT, which is why the label is Hounsfield unit. The other options don’t reflect the established terminology: they use vague or nonstandard phrases, whereas HU specifically stands for Hounsfield unit and is the standard name for this CT density measurement.