ABSTRACT
Single photon emission computed tomography [SPECT] often yields unique diagnostic information not available on planar bone scintigraphy. This study was done to assess the validity of single photon emission computed tomography in detecting early bone invasion and degree of invasion in the maxillofacial region by malignant tumours. 25 patients of both sexes and different ages having criteria of bone invasion were selected from National Cancer Institute and examined by routine radiography and SPECT examination for invasion and degree of invasion. The results revealed that there was no significant correlation between SPECT examination and hone invasion and the sensitivity was found to be 100%, specificity 25%, PVP 57.5%, PVN 100% and accuracy 88%