In computed tomography, the bone window is primarily used to visualize which tissue?

In computed tomography, the bone window is primarily used to visualize which tissue?

• A. Bone
• B. Soft tissue
• C. Air
• D. Water

Answer: (A)

Windowing in CT maps density values to grayscale in a way that highlights specific tissues. The bone window uses a high window level with a narrow width, which expands the display range for high-density structures and compresses mid- to low-density areas. This makes cortical and trabecular bone appear very bright with sharp edges, while soft tissues stay relatively subdued. Since bone has the highest attenuation among common tissues (cortical bone around +1000 HU, water 0 HU, air -1000 HU, soft tissue roughly +20 to +70 HU), the bone window is optimized to visualize bone anatomy and pathology such as fractures and cortical integrity. Other windows are tailored for soft tissue or air-filled spaces, so they don’t emphasize bone as effectively.

Windowing in CT maps density values to grayscale in a way that highlights specific tissues. The bone window uses a high window level with a narrow width, which expands the display range for high-density structures and compresses mid- to low-density areas. This makes cortical and trabecular bone appear very bright with sharp edges, while soft tissues stay relatively subdued. Since bone has the highest attenuation among common tissues (cortical bone around +1000 HU, water 0 HU, air -1000 HU, soft tissue roughly +20 to +70 HU), the bone window is optimized to visualize bone anatomy and pathology such as fractures and cortical integrity. Other windows are tailored for soft tissue or air-filled spaces, so they don’t emphasize bone as effectively.