Lateral digital photography with computer-aided goniometry versus standard goniometry for recording finger joint...

This study compares the accuracy of computer-aided goniometry with standard goniometry. 109 finger joint angles at the extremes of flexion and extension were measured by a senior hand therapist using standard goniometry. Lateral digital photographs were then taken of the hands and the same angles were read from these by computer. There was good correlation (r(2)=0.975) between the results. Computer goniometry averaged 1 degrees (95%Cl=0 degrees -+2 degrees ) more than the standard goniometry. We feel that computer goniometry of finger joints is accurate and compares well with standard goniometry.