How accurate is CT morphometry of airway? Phantom and clinical validation study.
Eur J Radiol
; 80(3): e524-30, 2011 Dec.
Article
em En
| MEDLINE
| ID: mdl-21273019
ABSTRACT
OBJECTIVE:
To assess the reliability of CT airway measurement using phantom and to evaluate its reproducibility using clinical chest CT images. MATERIALS ANDMETHODS:
The phantom consisted of six tubes with different diameters and wall thicknesses was used. The wall area ratio (%WA) and wall thickness ratio (%WT) were calculated and the difference from the actual value (error ratio) was assessed. In vivo validation was performed with MDCT data of consecutive 10 patients and inter- and intra-rater agreements of the measurement were evaluated.RESULTS:
The error ratio of %WA and %WT increased for the phantom tube with a 1mm or thinner wall thickness. The FOV size has an influence on the airway measurement especially for the tube with 1mm wall thickness. Inter-rater reliabilities between two observers for %WA and %WT were excellent and good intra-class correlation coefficient for %WA and %WT were obtained as 0.825 and 0.811, respectively. Intra-rater reliabilities of measurement also showed good intra-class correlation coefficient for %WA and %WT as 0.822 and 0.800, respectively.CONCLUSION:
Although the phantom study showed there is a tendency to overestimate the wall area of an airway with a thickness 1mm or less, the software has a potential to be used in assessing longitudinal observation of the same patient, as well as, comparison among different patients due to good intra- and inter-rater reliability.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Interpretação de Imagem Radiográfica Assistida por Computador
/
Tomografia Computadorizada por Raios X
/
Pulmão
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Limite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Eur J Radiol
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Japão