Validation Study of 3 DI Measurments by Spiral CT

Abstract

In this study the accuracy of distance measurements on the three-dimensional (3 D) image based on spiral X-ray computerized tomography (CT) were examined by using three fresh human cadaves. Comparative measurements were taken of the mandible removed from the cadaver by using caliper and reconstruted 3 D image (volume rendering) from CT slices. As a result, the variation between caliper and 3 DI measurements averased 0.361mm and incongruellce was 0.558%. In some cases, this means variation was smaller than the measuremtnts of mandible by using caliper. It was concluded that direct measurements on reconstructed 3 DI from data of the spiral CT are applicable to the clinical case.