Determines which minor head injury patients need head CT imaging.
Canadian CT Head Rule Calculator
Clinical decision support for CT imaging in eligible patients with minor head injury.
Patient Assessment
Complete all fields to determine whether the Canadian CT Head Rule indicates CT imaging.
About the Canadian CT Head Rule
The Canadian CT Head Rule helps identify eligible patients with minor head injury who may require CT imaging. It contains five high-risk criteria for neurosurgical intervention and two medium-risk criteria for clinically important brain injury on CT.
This calculator is clinical decision support only and does not replace clinical judgement, local imaging pathways, observation, or emergency assessment.
References
Stiell IG, Wells GA, Vandemheen K, et al. The Canadian CT Head Rule for patients with minor head injury. Lancet. 2001;357(9266):1391–1396.
Stiell IG, Clement CM, Rowe BH, et al. Comparison of the Canadian CT Head Rule and the New Orleans Criteria in patients with minor head injury. JAMA. 2005;294(12):1511–1518.
