This chapter, found in the headache section of the book, provides a succinct synopsis of a key study examining the use of computed tomography (CT) scans for minor head injury using the New Orleans criteria. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. The study showed that head CT scans for patients with minor head injury can be safely limited to those presenting with at least 1 of 7 specific clinical findings. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.