CT Numbers, also called Hounsfield units are scaled in cortical bone at which of the following numbers?

Hounsfield units (HU), or CT numbers, are a quantitative measure used in computed tomography (CT) to indicate the radiodensity of different substances. The scale is centered around water, which is assigned a value of 0 Hounsfield units. Air has a negative value, while various types of tissue, fluids, and materials have positive values reflecting their density relative to water.

Cortical bone, being a dense material, typically registers a significantly high Hounsfield unit value in CT imaging. The precise value can vary depending on the specific density of the bone, the patient's physiology, and other factors, but a common standard is approximately +1000 Hounsfield units for cortical bone. This high number reflects its high density compared to less dense materials like soft tissue or fat, which register lower values on the scale.

Therefore, recognizing that cortical bone has a Hounsfield unit value around +1000 is essential for differentiating it from less dense tissues and for accurate imaging interpretation in dental and medical contexts. This standard classification allows practitioners to effectively assess bone quality and make informed decisions about treatment planning and diagnosis.