An automatic recognition of the frontal sinus in x-ray images of skull.

Tabor, Zbisław; Karpisz, Dariusz; Wojnar, Leszek; Kowalski, Piotr · IEEE Trans Biomed Eng · 2009

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Abstract

In the present paper, a procedure is developed for fully automatic recognition of the frontal sinus in cranial radiographs. An X-ray image of a whole skull is required at the input of the procedure, which consists of three subsequent steps: the selection of a rectangular region of interest, containing the sinus; detection of the line of brow ridges; and fronto-nasal suture, detection of the borders of the frontal sinus. The recognition algorithm is based on a method of connectivity-preserving thresholding, introduced in the present study, and on watersheds from markers. Totally, 50 X-ray images have been analyzed. The frontal sinus borders were recognized correctly in 41 cases.

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