The potential application of silver and positron emission tomography for in vivo dosimetry during radiotherapy.
Phys Med Biol
; 53(2): 353-60, 2008 Jan 21.
Article
en En
| MEDLINE
| ID: mdl-18184991
ABSTRACT
The possible use of silver as a material for in vivo dosimetry in radiotherapy was investigated. The investigation was carried out using a positron emission tomography (PET) scanner, two clinical accelerators and a phantom with silver implants. The phantom was irradiated several times to doses between 6 and 45 Gy. The resulting activity of positron-emitting isotopes produced in the silver by photonuclear processes was measured. It was found that the two therapeutic beams with energies of 15 MV and 18 MV would produce approximately 8344 and 7013 atoms of the radioactive isotope (106)Ag per Gy of absorbed dose per gram of silver. This demonstrates that it is possible to derive absorbed doses from the radioactivity induced in silver by radiation when measured with the PET scanner. Even though the physical basis for this method is found to be sound, its application, for instance to perform quality assurance of stereotactic radiotherapy, needs further study.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Radiometría
/
Plata
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Planificación de la Radioterapia Asistida por Computador
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Radioterapia Conformacional
/
Tomografía de Emisión de Positrones
Tipo de estudio:
Diagnostic_studies
/
Evaluation_studies
Límite:
Humans
Idioma:
En
Revista:
Phys Med Biol
Año:
2008
Tipo del documento:
Article
País de afiliación:
Dinamarca