lots of Xray's put together by computer to give 3D image

6 densities in Hounsfield units (HU)

<aside> 💡 dont use lucency/opacity, only density

</aside>

CT windows are used to compact the gradient change (shortened window) and make subtle changes more easy to distinguish

IV contrast can be done in different phases (arterial vs venous)

IV and oral contrast can be done simultaneously

Describing changes

• Location (lateral, medial, proximal, distal)
• size
• density (hypodense (dark) vs hyperdense (light))
• structure (homogenous vs heterogenous)