Friday, April 15, 2016

Hassan S Salehi Publishes Research Article

Hassan S Salehi Publishes Research Article in Elsevier Journal of Oral Surgery Oral Medicine Oral Pathology and Oral Radiology

OCT and the corresponding CBCT image, contour plot for the OCT image, and histogram of the OCT image for air, water, fatty tissue, trabecular bone, cortical bone, and enamel.

Hassan S. Salehi, PhD, visiting assistant professor of electrical and computer engineering at the University of Hartford has published a research article in Elsevier Journal of Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, April 2016. This research work was done in collaboration with the Stony Brook University School of Dental and the University of Connecticut (UCONN) School of Dental Medicine.

This paper, "Tissue characterization using optical coherence tomography and cone beam computed tomography: A comparative pilot study," reports the imaging of four types of tissues ex vivo, i.e., human enamel, human cortical bone, human trabecular bone, fatty tissue plus water and air using optical coherence tomography (OCT). Furthermore, a method for qualitative and quantitative analysis of the human specimens was developed utilizing image processing techniques. The same types of tissues were also imaged using cone beam computed tomography (CBCT) and grayscale values were measured. The qualitative indices (intensity profile, contour plot and histogram) for OCT images were able to provide information regarding surface characteristics as well as changes in tissue properties at different interfaces. The quantitative index (pixel intensity values) was also able to render information regarding the distribution and density of the pixels in different samples. A similar pattern was observed in the pixel intensity values and grayscale values in both imaging modalities. Within the limitations of this ex vivo pilot study, it was concluded that OCT can reliably differentiate between a range of hard and soft tissues.

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