Results 181 to 190 of about 4,028 (215)

Computer-aided automated landmarking of cephalograms [PDF]

Journal of Orofacial Orthopedics / Fortschritte der Kieferorthop�die, 1998
The computer-aided method presented is able to interpret and measure radiological structures automatically and reproducibly on a large number of randomly selected lateral head films of different film quality. For example the hard and soft tissue expression of the profile is used to discuss method, application and disadvantages.
Ulrike Ehmer, Holger A. Brinkhaus, N. Meier, Friedhelm Bollmann, Thomas Stamm   +4 more
openaire   +2 more sources

Some of the next articles are maybe not open access.

Related searches:

Automatic landmarking of cephalograms

Computers and Biomedical Research, 1989
This paper presents an algorithm for automatically locating certain characteristic anatomical points called landmarks on cephalograms (skull X-rays). These landmarks are used by orthodontists in diagnosis and treatment planning. The algorithm uses digital image processing and feature recognition techniques to locate the landmarks.
D. F. Fay, S. Parthasarathy, S. T. Nugent, P. G. Gregson   +3 more
openaire   +3 more sources

Comparison of measurements from photographed lateral cephalograms and scanned cephalograms

American Journal of Orthodontics and Dentofacial Orthopedics, 2007
In this study, we investigated whether a digital photograph of a lateral cephalometric radiograph can produce measurements as accurate as those from a digital image created with a flatbed scanner.Twenty pretreatment lateral cephalograms were randomly selected from the patient files at Chesterfield Royal Hospital. Each radiograph was photographed with a
Jonathan Sandler, Caroline McCarthy, Anwar Ali Shah, Jill Collins   +3 more
openaire   +3 more sources

Characteristics of digital cephalograms and film/screen cephalograms: a comparative study [PDF]

American Journal of Orthodontics and Dentofacial Orthopedics, 2002
observers for the indirect and 1 observer for the direct DIs identified 17 and 22 landmarks, respectively, on the computer monitor. X and y coordinates were recorded, and cephalometric measurements were calculated. Statistical analysis included paired-sample t tests and ANOVA models.
openaire   +1 more source

Landmark errors on posteroanterior cephalograms

American Journal of Orthodontics and Dentofacial Orthopedics, 2016
It is important to reduce the method errors when evaluating posteroanterior cephalograms to see either small deviations from normal or transverse changes caused by orthodontic treatment. The aim of this study was to determine horizontal and vertical intraexaminer and interexaminer agreement in localization of landmarks in posteroanterior cephalograms ...
Feyza Ulkur, Fulya Ozdemir, Derya Germec-Cakan, E. Cigdem Kaspar   +3 more
openaire   +3 more sources

Knowledge-Based Landmarking of Cephalograms

Computers and Biomedical Research, 1985
Orthodontists have defined a certain number of characteristic points, or landmarks, on X-ray images of the human skull which are used to study growth or as a diagnostic aid. This work presents the first step toward an automatic extraction of these points. They are defined with respect to particular lines which are retrieved first. The original image is
A D Léy-Mandel, John K. Tsotsos, Anastasios N. Venetsanopoulos   +2 more
openaire   +3 more sources

Feature subimage extraction for cephalogram landmarking [PDF]

Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286), 2002
The significant features corresponding to skull structures on cephalograms are clinically useful for cephalometric diagnosis and superimposition. Accordingly the specific anatomical landmarks need to be firstly located for cephalometric measurements. In this paper, a novel method combining the multilayer perceptron and genetic algorithm is proposed to ...
Yen Ting Chen, Kuo-Sheng Cheng, Jia-Kuang Liu   +2 more
openaire   +1 more source

Development of the 3D-cephalogram: A technical note

Journal of Cranio-Maxillo-Facial Surgery, 2007
The authors developed the 3D-cephalogram via combination of 3D-CT and cephalometric analysis.The 3D-cephalogram can directly express cephalometric data on the surface of skeletal structures in a manner similar to a conventional cephalogram.This analysis revealed complex facial asymmetries in particular, on either side of the mandible.
Masaaki Kosaka, Yu Miyasato, Hiroshi Kamiishi   +2 more
exaly   +4 more sources

Landmarking of cephalograms using a microcomputer system

Computers and Biomedical Research, 1990
Landmarks, or certain characteristic reference points, on cephalograms are used as a diagnostic aid employed in treatment planning by orthodontists. This work presents an algorithm for recognizing some anatomical features and locating landmarks on lateral skull X rays (cephalograms) using digital image processing and feature recognition techniques.
D. F. Fay, P. H. Gregson, G. M. Jenson, W. Tong, S. T. Nugent   +4 more
openaire   +3 more sources

Landmark identification errors on cone-beam computed tomography-derived cephalograms and conventional digital cephalograms

American Journal of Orthodontics and Dentofacial Orthopedics, 2011
In this study, we investigated the landmark identification errors on cone-beam computed tomography (CBCT)-derived cephalograms and conventional digital cephalograms.Twenty patients who had both a CBCT-derived cephalogram and a conventional digital cephalogram were recruited.
Fu-Chang Hu, Chung-Chen Yao, Yi-Jane Chen, Eddie Hsiang-Hua Lai, Chen Mf, Zwei-Chieng Chang   +5 more
openaire   +3 more sources