Contouring of the Pharyngeal Superior Constrictor Muscle (PSCM). A cooperative study of the Italian Association of Radiation Oncology (AIRO) Head and Neck Group.
Radiother Oncol
; 112(3): 337-42, 2014 Sep.
Article
em En
| MEDLINE
| ID: mdl-25005577
ABSTRACT
BACKGROUND AND PURPOSE:
Irradiation of the Pharyngeal Superior Constrictor Muscle (PSCM) seems to play a crucial role in radiation-related swallowing dysfunctions. Purpose of our study was to quantify operator-related variability in the contouring of PSCM on Computed Tomography (CT) scans and adherence with contours derived from MR images. MATERIALS ANDMETHODS:
Three sets of treatment planning CT and their corresponding MR images were selected. Contouring of the PSCM was performed using both a literature-based method, derived from literature review, and an optimized method, derived from Magnetic Resonance (MR) images thus obtaining "literature-based" and "optimized" contours. Each operator contoured the PSCM on CT scans according to both methods for three times in three different days. Inter- and intra-operator variability and adherence to a contour obtained from MR images (named "MR-derived" contour) were analyzed.RESULTS:
Thirty-four operators participated and 612 contours were obtained. Both intra- and inter-operator variability and adherence to the "MR-derived" contour were significantly different between the two methods (p⩽0.05). The "optimized" method showed a lower intra- and inter-operator variability and a higher adherence to the "MR-derived" contour.CONCLUSIONS:
The "optimized" method ameliorates both operator-related variability and adherence with MR images.Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Músculos Faríngeos
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Imageamento por Ressonância Magnética
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Tomografia Computadorizada por Raios X
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Radioterapia (Especialidade)
Tipo de estudo:
Clinical_trials
/
Guideline
/
Observational_studies
/
Risk_factors_studies
Limite:
Humans
País/Região como assunto:
Europa
Idioma:
En
Revista:
Radiother Oncol
Ano de publicação:
2014
Tipo de documento:
Article