Active Breathing Coordinator in adjuvant three-dimensional conformal radiotherapy of early stage breast cancer: a feasibility study

  • Massaccesi M
  • Caravatta L
  • Cilla S
 et al. 
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AIMS: To investigate the technical feasibility of utilizing the Active Breathing Coordinator for planning of postoperative three-dimensional conformal radiation therapy in patients with early stage breast cancer undergoing breast conservation therapy. METHODS: Patients with early stage breast cancer for whom adjuvant radiotherapy after breast-conserving surgery was planned were consecutively enrolled. Five sessions of simulation with the Active Breathing Coordinator were planned for each patient. Computed tomography for simulation was not acquired until a good level of compliance with the procedure was achieved by the patient. Patients who did not show a satisfactory level of compliance after the planned fifth session were defined as noncompliant. Two simulation computed tomography scans were acquired: the first without the Active Breathing Coordinator during free breathing, the second with the Active Breathing Coordinator. Forward intensity-modulated treatment plans were calculated. Mean lung dose (MLDipsilateral) and V30 (V30lung) for the ipsilateral lung and V30 for the heart (V30heart), were evaluated. RESULTS: Twenty consecutive patients were enrolled (6 with left-sided breast cancer and 14 with right-sided breast cancer). Eighteen of the patients completed the simulation computed tomography with the Active Breathing Coordinator after 1-5 sessions (median, 3). In 16 of the 18 patients, a reduction of V301ung was observed with the Active Breathing Coordinator. In 15 of the 18 patients, a reduction of MLDipsiateral was also observed. In 5 of the 6 patients with left-sided breast cancer, a reduction of V30heart was noted. CONCLUSIONS: Routine application of the Active Breathing Coordinator in clinical practice is feasible, even though it requires an increased workload. Dosimetric results are encouraging in terms of a better sparing of the ipsilateral lung and the heart.

Author-supplied keywords

  • *Mastectomy, Segmental
  • *Radiotherapy Planning, Computer-Assisted
  • *Radiotherapy, Conformal/methods
  • *Respiration
  • Adult
  • Aged
  • Aged, 80 and over
  • Breast Neoplasms/*pathology/*radiotherapy
  • Feasibility Studies
  • Female
  • Humans
  • Inhalation
  • Middle Aged
  • Neoplasm Staging
  • Radiotherapy Dosage
  • Radiotherapy, Adjuvant

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  • M Massaccesi

  • L Caravatta

  • S Cilla

  • C Digesu

  • F Deodato

  • G Macchia

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