Liquid embolisation material reduces the delivered radiation dose: a physical experiment.
Acta Neurochir (Wien)
; 150(2): 161-4; discussion 164, 2008 Feb.
Article
em En
| MEDLINE
| ID: mdl-18213438
OBJECTIVE: To test a new hypothesis that the glue/contrast admixture used for embolisation reduces the dose delivered to AVMs using an experimental model. METHOD: A model was created using a block of "solid water" (6 x 5 x 2 cm) with twelve wells of different depths. Different concentrations of the glue admixture (Enbucrilate + Lipiodol) were used. The model was irradiated using a 5MV beam with a clinical LINAC system and the dose was checked upstream and downstream. Dose was measured using Kodak XV film, a Vidar 16 bit film scanner and software for therapeutic film dosimetry measurements (RIT software). RESULTS: The radiation dose varied with the distance beyond the glue solid water interface. For distances of 0, 2 and 5 mm to the film, the mean reduction was 13.65% (SD = 2.94), 6.87% (SD = 1.95) and 1.75% (SD = 1.14), respectively. There was also correlation with the Lipiodol concentration in the mixture. The maximum reductions for 80, 50 and 20% Lipiodol concentrations were 16.1% (SD = 1.32), 14.85% (SD = 0.98) and 10% (SD = 1.21), respectively. There was no correlation between the glue depth and the dose delivered. CONCLUSION: The hypothesis that the glue mixture used for embolisation reduces the radiation dose delivered was experimentally confirmed with this study.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Malformações Arteriovenosas
/
Doses de Radiação
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Óleo Iodado
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Meios de Contraste
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Embolização Terapêutica
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Embucrilato
Limite:
Humans
Idioma:
En
Revista:
Acta Neurochir (Wien)
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Áustria