The UK HeartSpare Study (Stage II): Multicentre Evaluation of a Voluntary Breath-hold Technique in Patients Receiving Breast Radiotherapy.
Clin Oncol (R Coll Radiol)
; 29(3): e51-e56, 2017 03.
Article
em En
| MEDLINE
| ID: mdl-27890346
ABSTRACT
AIMS:
To evaluate the feasibility and heart-sparing ability of the voluntary breath-hold (VBH) technique in a multicentre setting. MATERIALS ANDMETHODS:
Patients were recruited from 10 UK centres. Following surgery for early left breast cancer, patients with any heart inside the 50% isodose from a standard free-breathing tangential field treatment plan underwent a second planning computed tomography (CT) scan using the VBH technique. A separate treatment plan was prepared on the VBH CT scan and used for treatment. The mean heart, left anterior descending coronary artery (LAD) and lung doses were calculated. Daily electronic portal imaging (EPI) was carried out and scanning/treatment times were recorded. The primary end point was the percentage of patients achieving a reduction in mean heart dose with VBH. Population systematic (Σ) and random errors (σ) were estimated. Within-patient comparisons between techniques used Wilcoxon signed-rank tests.RESULTS:
In total, 101 patients were recruited during 2014. Primary end point data were available for 93 patients, 88 (95%) of whom achieved a reduction in mean heart dose with VBH. Mean cardiac doses (Gy) for free-breathing and VBH techniques, respectively, were heart 1.8 and 1.1, LAD 12.1 and 5.4, maximum LAD 35.4 and 24.1 (all P<0.001). Population EPI-based displacement data showed Σ =+1.3-1.9 mm and σ=1.4-1.8 mm. Median CT and treatment session times were 21 and 22 min, respectively.CONCLUSIONS:
The VBH technique is confirmed as effective in sparing heart tissue and is feasible in a multicentre setting.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
/
Órgãos em Risco
/
Suspensão da Respiração
Tipo de estudo:
Clinical_trials
/
Etiology_studies
Limite:
Aged
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
Clin Oncol (R Coll Radiol)
Assunto da revista:
NEOPLASIAS
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Reino Unido