Results 171 to 180 of about 4,801 (212)

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

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.
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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.
Zwei-Chieng, Chang, Fu-Chang, Hu, Eddie, Lai, Chung-Chen, Yao, Mu-Hsiung, Chen, Yi-Jane, Chen   +5 more
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Extracting structure-tokens of cephalograms

1995 IEEE International Conference on Systems, Man and Cybernetics. Intelligent Systems for the 21st Century, 2002
Presents an algorithm and representation scheme for extracting structure tokens of cephalograms directly from X-ray images. The method is based on a principle of visual perception, i.e., edge partitioning and grouping which simulates human visual process on edge perception in certain aspects.
null QiGang Gao, R.X. Wang
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Automatic Landmarking of Cephalograms by Cellular Neural Networks

2005
Cephalometric analysis is a time consuming measurement process by which experienced orthodontist identify on lateral craniofacial X-rays landmarks that are needed for diagnosis and treatment planning and evaluation. High speed and accuracy in detection of craniofacial landmarks are widely demanded.
GIORDANO D, LEONARDI, Rosalia Maria, MAIORANA F, CRISTALDI G, DISTEFANO M.   +4 more
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Automatic Analysis Of Landmarks In Cephalograms

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991, 2005
Landmarks on the cephalograms are those representing the actual anatomic structures of the skull. These points are used by orthodontists for diagnosis and treatment planning. In this study, a microcomputer system with a desk-top scanner was employed for locating the landmarks of X-ray cephalogram automatidy.
null Kuo-sheng Cheng, null Yen-ting Chen, null Jia-kuang Liu   +2 more
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Predicting vertical dimension with cephalograms, for edentulous patients

Gerodontology, 2005
Objectives:  To provide information on vertical dimension (VD), occlusal plane (OP), and size of future occlusal rims, through lateral Rx and cephalometric tracings that analyse and compare hard and soft tissue. To show that these measures are compatible with methods routinely used to prescribe for full.Design:  Ten patients age range 53–81. Lateral Rx,
D, Brzoza, N, Barrera, G, Contasti, A, Hernández   +3 more
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Feature subimage extraction for cephalogram landmarking

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 ...
null Yen-ting Chen, null Kuo-sheng Cheng, null Jia-kuang Liu   +2 more
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Identification of a landmark in a roentgenographic cephalogram by employing the wavelet neurons [PDF]

This paper describes an identification method of a landmark in a roentgenographic cephalogram by employingthe input-correlated wavelet neurons. For the purpose of improvement of identification precision,a novel pattern matching method, named “wavelet ...
ヤマカワ, タケシ, Yamakawa, Takeshi, カワノ, ヒデアキ, Kawano, Hideaki, 河野, 英昭, 山川, 烈   +5 more
exaly   +2 more sources

Mandibular remodeling measured on cephalograms: 2.

American Journal of Orthodontics and Dentofacial Orthopedics, 1992
This study quantifies the differences in the perceived pattern of mandibular remodeling when two different methods are used to superimpose roentgenographic images of the mandible. Lateral cephalograms for a group of subjects with metallic implants of the Bjork type were superimposed twice; first on the metallic implants and then independently on ...
Sheldon Baumrind, Yocheved Ben-Bassat, Edward L. Korn, Luis Alberto Bravo, Sean Curry   +4 more
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THE INTERPRETATION OF EN-CEPHALOGRAMS

The Journal of Nervous and Mental Disease, 1937
R. N. Dejong, R. W. Waggoner
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