title: [Definition of nodal volumes in breast cancer treatment and segmentation guidelines].
abstract: OBJECTIVE
  To assist in the determination of breast and nodal volumes in the setting of radiotherapy for breast cancer and establish segmentation guidelines. Materials and methods. Contrast metarial enhanced CT examinations were obtained in the treatment position in 25 patients to clearly define the target volumes. The clinical target volume (CTV) including the breast, internal mammary nodes, supraclavicular and subclavicular regions and axxilary region were segmented along with the brachial plexus and interpectoral nodes. The following critical organs were also segmented: heart, lungs, contralateral breast, thyroid, esophagus and humeral head.
  
  
  RESULTS
  A correlation between clinical and imaging findings and meeting between radiation oncologists and breast specialists resulted in a better definition of irradiation volumes for breast and nodes with establishement of segmentation guidelines and creation of an anatomical atlas.
  
  
  CONCLUSIONS
  A practical approach, based on anatomical criteria, is proposed to assist in the segmentation of breast and node volumes in the setting of breast cancer treatment along with a definition of irradiation volumes.
authors.affiliation: Département d'Oncologie Radiothérapie, Institut Curie, 26, rue d'Ulm, 75005 Paris. youlia.kirova@curie.net <youlia.kirova@curie.net>
authors.forename: Y M
authors.initials: YM
authors.lastname: Kirova
authors.forename: P
authors.initials: P
authors.lastname: Castro Pena
authors.forename: R
authors.initials: R
authors.lastname: Dendale
authors.forename: F
authors.initials: F
authors.lastname: Campana
authors.forename: M A
authors.initials: MA
authors.lastname: Bollet
authors.forename: N
authors.initials: N
authors.lastname: Fournier-Bidoz
authors.forename: A
authors.initials: A
authors.lastname: Fourquet
mesh_terms: D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy*; D003299:Cooperative Behavior; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015182:Lymphatic Irradiation / Q000379:methods*; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging* / Q000532:radiotherapy*; D010348:Patient Care Team; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*