Computed Tomography (CT) and CT Arthrography

The role of computed tomography (CT) has increased tremendously due to technical developments which have allowed isotropic voxel acquisition, permitting high-quality multiplanar reformation and three-dimensional reconstruction of knee anatomy. In addition, dual-energy CT technology enables CT to perform specific detection of certain materials and improve reduction of metal artifacts. CT is widely available and fast to perform; therefore, the study is particularly useful in the evaluation of patients with acute trauma. CT remains essential when magnetic resonance imaging is contraindicated. The appropriate examination protocol will depend upon the suspected pathology and the equipment available. This chapter reviews the development in CT scanners, highlights the current relevant technologies, and presents examples of clinical applications.