Reproducibility of lateral cephalometric landmarks on conventional radiographs and spatial frequency-processed digital images / 대한구강악안면방사선학회지
Korean Journal of Oral and Maxillofacial Radiology
;
: 213-220, 2002.
Artigo
em Inglês
| WPRIM
| ID: wpr-73394
ABSTRACT
PURPOSE:
Computed radiography (CR) has been used in cephalometric radiography and many studies have been carried out to improve image quality using various digital enhancement and filtering techniques. During CR image acquisition, the frequency rank and type affect to the image quality. The aim of this study was to compare the diagnostic quality of conventional cephalometric radiographs to those of computed radiography. MATERIALS ANDMETHODS:
The diagnostic quality of conventional cephalometric radiographs (M0) and their digital image counterparts were compared, and at the same time, six modalities (M1-M6) of spatial frequency-processed digital images were compared by evaluating the reproducibility of 23 cephalometric landmark locations. Reproducibility was defined as an observer's deviation (in mm) from the mean between all observers. RESULTS ANDCONCLUSION:
In comparison with the conventional cephalometric radiograph (M0), M1 showed statistically significant differences in 8 locations, M2 in 9, M3 12, M4 in 7, M5 in 12, and M6 showed significant differences in 14 of 23 landmark locations (p<0.05). The number of reproducible landmarks that each modality possesses were 7 in M6, 6 in M5, 5 in M3, 4 in M4, 3 in M2, 2 in M1, and 1 location in M0. The image modality that observers selected as having the best image quality was M5.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Radiografia
/
Intensificação de Imagem Radiográfica
/
Cefalometria
/
Reprodutibilidade dos Testes
Tipo de estudo:
Estudo diagnóstico
Idioma:
Inglês
Revista:
Korean Journal of Oral and Maxillofacial Radiology
Ano de publicação:
2002
Tipo de documento:
Artigo
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