Type of Document	Master's Thesis
Author	Ramesh, Visvanathan
URN	etd-02062013-040221
Title	Model for precise detection of bone edges
Degree	Master of Science
Department	Electrical Engineering
Advisory Committee	Advisor Name Title Barber, Donald L. Committee Chair Ehrich, Robert W. Committee Chair Tront, Joseph G. Committee Member Yu, Kai Bor Committee Member
Keywords	X-ray spectroscopy
Date of Defense	1987-02-04
Availability	restricted
Abstract A mathematical model which is used to detect bone edges accurately is described in this thesis. This model is derived by assuming the X-ray source to be a square region. It is shown that for an ideal X-ray source (point source), the bone edge lies exactly at the location of maximum first derivative of the imaged object’s transmission function. However, for the non-ideal case, it is shown that the bone edge does not lie at the maximum first derivative location. Also, it is shown that an offset can be calculated from the edge parameters. The Marr- Hildreth edge detector is used to detect the initial estimates for edge location. Precise estimates are obtained by using the facet model. The offset is then cal- V culated and applied to these estimates.
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