Selective CT for Anticoagulated Head Injured Patients

This study is evaluating whether selective CT scanning (scanning only when clinically appropriate) is safe for patients on blood thinners (anticoagulants) who come to the emergency room after a head injury. The goal is to reduce unnecessary scans while still catching serious injuries. You may be eligible if... - You are 16 years of age or older - You have had a head injury and are presenting to the emergency department - You have had a head CT scan in the emergency department - You are currently taking anticoagulant medications You may NOT be eligible if... - Your head injury happened more than 48 hours before arriving at the emergency department - You have a penetrating head injury - You have been previously enrolled in this study - You live outside the hospital's catchment area - You were transferred from another emergency department after imaging was already done - You leave the emergency department before completing your medical assessment Talk to your doctor to see if this trial is right for you.