3D-conformal accelerated partial breast irradiation treatment planning: the value of surgical clips in the delineation of the lumpectomy cavity.
Radiat Oncol
; 4: 70, 2009 Dec 31.
Article
em En
| MEDLINE
| ID: mdl-20042124
ABSTRACT
BACKGROUND:
Accurate localisation of the lumpectomy cavity (LC) volume is one of the most critical points in 3D-conformal Partial breast irradiation (3D-APBI) treatment planning because the irradiated volume is restricted to a small breast volume. Here, we studied the role of the placement of surgical clips at the 4 cardinal points of the lumpectomy cavity in target delineation.METHODS:
Forty CT-based 3D-APBI plans were retrieved on which a total of 4 radiation oncologists, two trainee and two experienced physicians, outlined the lumpectomy cavity. The inter-observer variability of LC contouring was assessed when the CTV was defined as the delineation that encompassed both surgical clips and remodelled breast tissue.RESULTS:
The conformity index of tumour bed delineation was significantly improved by the placement of surgical clips within the LC (median at 0.65). Furthermore, a better conformity index of LC was observed according to the experience of the physicians (median CI = 0.55 for trainee physicians vs 0.65 for experienced physicians).CONCLUSIONS:
The placement of surgical clips improved the accuracy of lumpectomy cavity delineation in 3D-APBI. However, a learning curve is needed to improve the conformity index of the lumpectomy cavity.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Instrumentos Cirúrgicos
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Planejamento da Radioterapia Assistida por Computador
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Neoplasias da Mama
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Mastectomia Segmentar
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article