What is the significance of including distal tib-fib in collimation for lateral ankle X-ray?

Including the distal tib-fib in collimation for a lateral ankle X-ray is crucial for maintaining visibility of potential fractures. This region, which includes the lower part of the tibia and fibula, is frequently at risk during ankle injuries. By extending the collimation to encompass this area, the radiologist can better assess whether there are any fractures present not only in the ankle joint itself but also in the surrounding structures that could influence treatment decisions. Properly including the distal tib-fib ensures that all relevant anatomical details are captured, facilitating a comprehensive evaluation of the injury. This helps in confirming the pathology and deciding appropriate management steps, making this practice essential for an accurate diagnostic assessment.