Evaluation and comparison of Gray scale value measurements of normal bone, odontogenic cysts and odontogenic tumors of maxillofacial region using cone beam computer tomography images: a cross sectional study

Evaluation of GSV of odontogenic cysts and tumors in CBCT

Abstract

Purposes: Studies on gray scale value (GSV) done over the past decade showed that there is linear relationship between GSV in CBCT and HU in CT. In our study, we evaluated and compared the GSV of 30 odontogenic cysts, 30 odontogenic tumors and 30 normal (cancellous and cortical) bone.

Materials and methods: GSV at the epicentre of the odontogenic cysts and tumors, maximum and minimum GSV within the lesions and normal (cortical and cancellous) bones were evaluated and compared.

Results: The median GSV of odontogenic cysts and tumors ranged from -66 to +60 and -89 to +679 respectively at epicentre and found to have very high significance (p=0) between the GSV of odontogenic cysts, odontogenic tumors and normal bone values.

Conclusion: GSV in CBCT can be considered as investigative tool for the diagnosis of odontogenic cysts and tumors.