CT Value

CT Value, also known as computed tomography value, is a numerical measurement used in computed tomography (CT) imaging to quantify the radiodensity of tissues within the body. It is a crucial parameter that helps in distinguishing between different types of tissues based on their ability to attenuate X-rays.

The CT Value is expressed in Hounsfield units (HU), named after Sir Godfrey Hounsfield, the inventor of the CT scanner. The scale ranges from -1000 HU (representing air) to +1000 HU (representing dense bone). Different tissues and substances in the body have characteristic CT values that allow radiologists to identify and differentiate them on CT images.

The CT Value of a particular tissue is determined by the attenuation of X-rays as they pass through the tissue. Tissues with higher density, such as bone, will have higher CT values, while tissues with lower density, such as air-filled spaces, will have lower CT values. This information is essential for accurate diagnosis and treatment planning in various medical conditions.