title: An automatic recognition of the frontal sinus in x-ray images of skull.
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.
authors.affiliation: Institute of Applied Computer Science, Cracow 30-059, Poland. ztabor@pk.edu.pl
authors.forename: Zbisław
authors.initials: Z
authors.lastname: Tabor
authors.forename: Dariusz
authors.initials: D
authors.lastname: Karpisz
authors.forename: Leszek
authors.initials: L
authors.lastname: Wojnar
authors.forename: Piotr
authors.initials: P
authors.lastname: Kowalski
mesh_terms: D000465:Algorithms; D005626:Frontal Sinus / Q000000981:diagnostic imaging*; D010363:Pattern Recognition, Automated / Q000379:methods*; D011859:Radiography; D012886:Skull / Q000000981:diagnostic imaging*